Programmable Logic Controllers 5th Edition by Petruzella - Test Bank

Programmable Logic Controllers 5th Edition by Petruzella – Test Bank

 

Instant Download – Complete Test Bank With Answers

 

 

Sample Questions Are Posted Below

 

 

 

1. For the timer relay contact shown, when the relay coil is energized, there is a time delay before the contact closes.

 

 

 

 

 

 

 

TRUE

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe the operation of mechanical timers

 

Section: 07.01 Mechanical Timing Relays

 

Subtopic: Mechanical Timers

 

Topic: Programming Timers

 

Units: NA

 

2. For the timer relay contact shown, when the relay coil is de-energized, there is a time delay before the contact opens.

 

 

 

 

 

 

 

 

 

 

TRUE

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe the operation of mechanical timers

 

Section: 07.01 Mechanical Timing Relays

 

Subtopic: Mechanical Timers

 

Topic: Programming Timers

 

Units: NA

 

3. For the timer relay contact shown, when the relay coil is de-energized, there is a time delay before the contact closes.

 

 

 

 

 

 

 

 

TRUE

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe the operation of mechanical timers

 

Section: 07.01 Mechanical Timing Relays

 

Subtopic: Mechanical Timers

 

Topic: Programming Timers

 

Units: NA

 

4. For the timer relay contact shown, when the relay coil is energized, there is a time delay before the contact opens.

 

 

 

 

 

 

 

 

TRUE

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe the operation of mechanical timers

 

Section: 07.01 Mechanical Timing Relays

 

Subtopic: Mechanical Timers

 

Topic: Programming Timers

 

Units: NA

 

5. PLC timers are input instructions that provide the same functions as mechanical timing relays.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.02 Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

6. Timer instructions are found on all PLCs manufactured today.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.02 Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

7. The retentive timer reset (RES) instruction is always given the same address as the timer it resets.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

8. An alarm is to be switched on whenever a piping system has sustained a cumulative overpressure of 60 seconds. The most directly applicable timer to use would be the on-delay nonretentive timer.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

9. A lamp is to be switched off 10 seconds after a switch has been switched from its on to off position. The most directly applicable timer to use would be the off-delay nonretentive timer.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

10. When a time-delay period longer than the maximum preset time allowed for a single timer is required, the problem can be solved by programming two or more timers together.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.06 Cascading Timers

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

11. Normally, the reset input to a timer will override the control input of the timer.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

12. A retentive timer must be completely timed out to be reset.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

13. Retentive timers lose the accumulated time every time the rung condition becomes false.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

14. The instantaneous contacts of a timer have no time-delay period associated with them.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe the operation of mechanical timers

 

Section: 07.01 Mechanical Timing Relays

 

Subtopic: Mechanical Timers

 

Topic: Programming Timers

 

Units: NA

 

15. The accumulated time of a TOF timer is reset by causing the rung to go true momentarily.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

16. A RES (reset) instruction must be used to zero the accumulated value in an RTO timer.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

17. A timer’s delay time equals the value in the ACC multiplied by the time base.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

18. Timers can be retentive or nonretentive.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.02 Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

19. An RTO timer retains the present accumulated value when the rung goes false.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

20. A TOF timer starts to accumulate time when the rung becomes true.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

21. A TOF timer starts to accumulate time when the rung makes a true to false transition.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

22. Certain contacts of a mechanical timing relay are designed to operate at a preset time interval:

 

 

 

A.

 

after the coil is energized.

 

 

B.

after the coil is de-energized.

 

 

C.

after power is applied to the circuit.

 

 

D.

after the coil is energized or de-energized.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe the operation of mechanical timers

 

Section: 07.01 Mechanical Timing Relays

 

Subtopic: Mechanical Timers

 

Topic: Programming Timers

 

Units: NA

 

23. The relay contact drawn is designed to operate so that:

 

 

 

 

 

 

 

A.

 

when the relay coil is energized, there is a time delay in closing.

 

 

B.

 

when the relay coil is energized, there is a time delay in opening.

 

 

C.

 

when the relay coil is de-energized, there is a time delay before the contact opens.

 

 

D.

 

when the relay coil is de-energized, there is a time delay before the contact closes.

 

 

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe the operation of mechanical timers

 

Section: 07.01 Mechanical Timing Relays

 

Subtopic: Mechanical Timers

 

Topic: Programming Timers

 

Units: NA

 

24. In the hardwired circuit shown, the light will stay on:

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

as long as S1 is closed.

 

 

B.

 

for 5 s after coil TD is energized.

 

 

C.

 

for 5 s after coil TD is de-energized.

 

 

D.

as long as S1 is closed and for 5 s after coil TD is de-energized.

 

 

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe the operation of mechanical timers

 

Section: 07.01 Mechanical Timing Relays

 

Subtopic: Mechanical Timers

 

Topic: Programming Timers

 

Units: NA

 

25. Which one of the following timer parameters determines the time duration for the timing circuit?

 

 

 

A.

 

Accumulated time.

 

 

B.

 

Preset time.

 

 

C.

 

Timer address.

 

 

D.

 

Time base.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.02 Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

26. Which one of the following timer parameters represents the value that increments as the timer is timing?

 

 

 

A.

Accumulated time.

 

 

B.

Preset time.

 

 

C.

Timer address.

 

 

D.

Time base.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.02 Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

27. Which one of the following timer parameters determines the accuracy of the timer?

 

 

 

A.

 

Accumulated time.

 

 

B.

 

Preset time.

 

 

C.

 

Timer address.

 

 

D.

 

Time base.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.02 Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

28. The timer file for SLC 500 controllers is:

 

 

 

A.

T1

 

 

B.

T2

 

 

C.

T3

 

 

D.

T4

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

29. For the on-delay timer instruction shown the timer number is:

 

 

 

 

 

 

 

 

 

A.

 

0

 

 

B.

 

200

 

 

C.

 

T4:3

 

 

D.

 

0.1

 

 

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

30. The on-delay timed period for the timer shown would be:

 

 

 

 

 

 

 

 

 

A.

 

3 seconds

 

 

B.

 

4 seconds

 

 

C.

 

20 seconds

 

 

D.

 

200 seconds

 

 

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

31. For the timer program shown, output B is switched ON when:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

power is applied.

 

 

B.

input A is closed.

 

 

C.

the timer is accumulating time.

 

 

D.

the accumulated value equals the preset value.

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

32. For the timer program shown, output C is switched ON when:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

power is applied.

 

 

B.

input A is closed.

 

 

C.

the timer is accumulating time.

 

 

D.

the accumulated value equals the preset value.

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

33. For the timer program shown, output D is switched ON when:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

power is applied.

 

 

B.

input A is closed.

 

 

C.

the timer is accumulating time.

 

 

D.

the accumulated value equals the preset value.

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

34. For the timer circuit shown, the timer accumulated value will reset to zero whenever:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

input A switch is opened.

 

 

B.

input A switch is closed.

 

 

C.

the DN bit is set to 1.

 

 

D.

the EN bit is set to 1.

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

35. For the timer table shown, bit level addressing is used for:

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

EN, TT, PRE, and ACC

 

 

B.

 

EN, TT, and DN

 

 

C.

 

PRE, ACC, TT, and EN

 

 

D.

PRE and ACC

 

 

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

36. For the hardwired timer circuit shown, contact TD-1 is the ____ contact and TD-2 is the ____ contact.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

ON, OFF

 

 

B.

 

OFF, ON

 

 

C.

 

instantaneous, timed

 

 

D.

timed, instantaneous

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe the operation of mechanical timers

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: Mechanical Timers

 

Topic: Programming Timers

 

Units: NA

 

37. For the programmed timer circuit shown the ____ bit of the timer functions similar to an instantaneous contact.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

DN

 

 

B.

EN

 

 

C.

PB1

 

 

D.

PB2

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

38. For the programmed timer circuit shown, the ____ bit of the timer functions similar to a timed contact.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

DN

 

 

B.

 

EN

 

 

C.

PB1

 

 

D.

PB2

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

39. The on-delay timer (TON) starts timing when the timer’s:

 

 

 

A.

 

ladder rung switches from false to true.

 

 

B.

 

ladder rung switches from true to false.

 

 

C.

 

accumulated value equals its preset value.

 

 

D.

 

accumulated value is greater than its preset value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40. The off-delay timer (TOF) starts timing when the timer’s:

 

 

 

A.

ladder rung switches from false to true.

 

 

B.

ladder rung switches from true to false.

 

 

C.

accumulated value equals its preset value.

 

 

D.

accumulated value is greater than its preset value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual Bloom’s: Verb 2. Understand Chapter: 07 Programming Timers Difficulty: Medium

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

Section: 07.03 On-Delay Timer Instructions Subtopic: PLC Programs with Timers

Topic: Programming Timers

Units: NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual Bloom’s: Verb 2. Understand Chapter: 07 Programming Timers Difficulty: Medium

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

Section: 07.04 Off- Delay Timer Instruction

Subtopic: PLC Timer Instructions

Topic: Programming Timers

Units: NA

 

41. For the programmed timer circuit shown, the pilot light should come on:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

as soon as the switch is closed.

 

 

B.

 

before the switch is closed.

 

 

C.

 

for 15 seconds after the switch is opened.

 

 

D.

as soon as the switch is closed and for 15 seconds after the switch is opened.

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

42. For the programmed timer circuit shown, when the switch is initially closed motor(s) _____ start(s) immediately.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

M1

 

 

B.

M2

 

 

C.

M3

 

 

D.

all of these

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

43. For the programmed timer circuit shown, assume the switch is closed for 5 seconds and than opened. After 12 seconds have elapsed motor(s) ____ will still be operating.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

M1, M2, M3

 

 

B.

M2, M3

 

 

C.

M3

 

 

D.

none of these

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 4. Analyze

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

44. The main difference between a TON and TOF timer is that the:

 

 

 

A.

 

TON timer can maintain its accumulated time on loss of power or logic continuity.

 

 

B.

 

TOF timer can maintain its accumulated time on loss of power or logic continuity.

 

 

C.

 

TOF timer begins timing when logic continuity to the timing rung is lost.

 

 

D.

 

TON timer begins timing when logic continuity to the timing rung is lost.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

45. The operation of a PLC retentive timer is similar to that of an:

 

 

 

A.

electromagnetic pneumatic timer.

 

 

B.

electromechanical motor-driven timer.

 

 

C.

off-delay timer.

 

 

D.

on-delay timer.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

46. The main difference between a PLC retentive and nonretentive timer is that the:

 

 

 

A.

 

retentive timer can be programmed for much longer time delay periods.

 

 

B.

 

nonretentive timer can be programmed for much longer time delay periods.

 

 

C.

 

retentive timer maintains the current time should power be removed from the device or when the timer rung goes false.

 

D.

 

nonretentive timer maintains the current time should power be removed from the device or when the timer rung goes false.

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

47. Unlike the TON timer, the RTO timer requires a(n):

 

 

 

A.

timer reset instruction.

 

 

B.

input condition instruction.

 

 

C.

internal relay instruction.

 

 

D.

instantaneous contact instruction.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

48. When addressing an RES instruction, it must be addressed to:

 

 

 

A.

 

a TOF instruction.

 

 

B.

 

a TON instruction.

 

 

C.

 

any address other than that of the RTO instruction.

 

 

D.

 

the same address as that of the RTO instruction.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

49. The type of timer program shown is a:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

retentive on-delay.

 

 

B.

retentive off-delay.

 

 

C.

nonretentive off-delay

 

 

D.

nonretentive on-delay.

 

 

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

50. For the program shown, the timer starts timing when:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

PB1 is closed.

 

 

B.

PB2 is closed.

 

 

C.

both PB1 and PB2 are closed.

 

 

D.

either PB1 or PB2 is closed.

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

51. For the program shown, the timer accumulated time is set to zero anytime:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

 

PB1 is closed.

 

 

B.

PB2 is closed.

 

 

C.

PB1 is open.

 

 

D.

PB2 is open.

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

52. To reset a retentive timer, the:

 

 

 

A.

 

AC time must be greater than the PR time.

 

 

B.

 

PR time must be greater than the AC time.

 

 

C.

 

AC time must equal the PR time.

 

 

D.

 

none of these.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

53. The interconnecting of timers is commonly called:

 

 

 

A.

grouping.

 

 

B.

programming.

 

 

C.

sequencing.

 

 

D.

cascading.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.06 Cascading Timers

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

54. For the programmed timers shown, the output of timer T4:5:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.

turns on after a 10-s time delay and remains on.

 

 

B.

turns off after a 2-s time delay and remains off.

 

 

C.

turns on after a 3-s time delay and remains on.

 

 

D.

is pulsed on and off at 1-s intervals.

 

 

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.06 Cascading Timers

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

55. Which instruction can best be used to turn an output coil on or off after the rung has been false for a desired time?

 

 

 

A.

 

RTO

 

 

B.

 

TON

 

 

C.

 

ON OFF

 

 

D.

 

TOF

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

56. The amount of time for which a timer is programmed is called the

 

 

 

A.

preset.

 

 

B.

desired time.

 

 

C.

set point.

 

 

D.

lapsed time.

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.04 Off-Delay Timer Instruction

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

57. When the timing of a device is not reset on a loss of power, the timing is said to be:

 

 

 

A.

 

continuous

 

 

B.

 

holding

 

 

C.

 

retentive

 

 

D.

 

saved

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

58. RES instructions are used with:

 

 

 

A.

TOF timers

 

 

B.

TON timers

 

 

C.

RTO timers

 

 

D.

all of these

 

 

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.05 Retentive Timer

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

59. One of the advantages of using a PLC for timing circuit applications is the entire timing function occurs inside the controller.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 1. Remember

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.02 Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

60. The accuracy and repeatability of PLC timers are not as good as that of mechanical and electronic timing relays.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 5. Interpreting

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.02 Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

61. The intervals that timers time out at are referred to as the time base.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.02 Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

62. The only way to reset a TON instruction is to use a Reset (RES) instruction.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

63. Cascading timers provide a method to extend the timing range.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.06 Cascading Timers

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

64. Reciprocating timers are used in situations where a constant cycling of an output is required.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 2. Conceptual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.06 Cascading Timers

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

65. A typical application for a PLC circuit combining both cascading and reciprocating functions would be the control of traffic signals.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 3. Procedural

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Create and understand the operation of PLC programs with timer instructions

 

Section: 07.06 Cascading Timers

 

Subtopic: PLC Programs with Timers

 

Topic: Programming Timers

 

Units: NA

 

66. The preset time of a TON timer instruction represents the amount of time that has elapsed from when the instruction became true.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

67. A retentive on-relay timer is capable retaining the accumulated value in the event of a power loss to the controller.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Medium

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

68. The Enable bit of a TON timer will be true (1) immediately upon the beginning of the timing cycle.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

69. For ControlLogix controllers the time base is fixed at 1 second.

 

 

 

FALSE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA

 

70. The loss of logic continuity to either a TON or TOF timer causes the timer instruction to reset.

 

 

 

TRUE

 

Accessibility: Keyboard Navigation

 

Bloom’s: Object 1. Factual

 

Bloom’s: Verb 2. Understand

 

Chapter: 07 Programming Timers

 

Difficulty: Easy

 

Gradable: automatic

 

Learning Objective: Describe PLC timer instructions

 

Section: 07.03 On-Delay Timer Instructions

 

Subtopic: PLC Timer Instructions

 

Topic: Programming Timers

 

Units: NA