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1. Pilot devices are used in motor control circuits to provide ________.

speed regulation

sequencing and automatic operation within certain parameters

contact arc suppression

overvoltage protection

Question 1 of 20

2. The minimum allowable coil control voltage needed to keep an electromechanical device energized is called the ________.

seal-in voltage

pickup voltage

transition voltage

dropout voltage

Question 2 of 20

In the figure above, symbol E represents a ________.

foot switch

float switch

pressure switch

temperature switch

Question 3 of 20

4. Which of the following are primarily designed for use with inductive motor loads and to withstand the interrupt current of a locked rotor?

IEC-rated contactors/motor starters

Lighting contactors

Definite-purpose contactors/motor starters

NEMA-rated contactors/motor starters

Question 4 of 20

5. Jogging is also referred to as ________.

stepping

inching

throttling

plugging

Question 5 of 20

6. All of the Start buttons must be connected in parallel with the auxiliary contactor and all of the Stop buttons must be connected in series when installing ________.

two or more pushbutton stations

four or more pushbutton stations

five or more pushbutton stations

three or more pushbutton stations

Question 6 of 20

7. Most transient suppression modules consist of an RC circuit that is designed to suppress coil voltage transients to approximately what percentage of the peak coil supply voltage?

250%

125%

300%

200%

Question 7 of 20

8. The nameplate on a motor indicates that the motor has an FLC of 15A and a service factor (SF) of 1.15. How much additional current can this motor safely handle for intermittent power demands?

1.75A

1.15A

3.25A

2.25A

Question 8 of 20

9. NEC Article 430, Part VII covers ________.

motor and controller circuit overload protection

the criteria for selecting the type of enclosure to use for controllers in classified locations

motor controllers

motor circuits involving special equipment and hazardous locations

Question 9 of 20

10.

In the figure above, which of the following terminals of junction box JB108 connect to the local control station HS108?

1A, 2, 3, 10

1A, 1B, 9

1E, 15

1, 1E

Question 10 of 20

11. A relay designated as a 3PDT-SB relay ________.

is a double-break type

is a single-throw type

has three N.O. (normally open) contacts

has three N.O. (normally open) and three N.C. (normally closed) contacts

Question 11 of 20

12.

In the figure above, the purpose of the M1 normally closed contacts shown in the control circuit is to ________.

prevent the fill pump from operating when the drain pump is operating

provide memory for the float switch

prevent the drain pump from operating when the fill pump is operating

provide memory for the Start switch

Question 12 of 20

13.

In the figure above, the belt runoff switch ZS108A is connected to junction box JB108 by cable ________.

C108K

C108G

C108H

C108J

Question 13 of 20

14.

In the figure above, the components marked 2 are ________.

reset terminals

overload contacts

melting-alloy heater assemblies

load terminals

Question 14 of 20

15. Which of the following describes a retroreflective scan?

The scanning method in which the receiver responds only to depolarized light reflected from a corner cube reflector or polarized sensitive tape

The scanning method in which a target is detected as it passes between a photoelectric sensor and a reflector

The scanning method in which the light beam transmitted from the transmitter is reflected back to the receiver by the target to be detected

The scanning method in which the target to be detected passes between the transmitter and receiver, interrupting the light beam

Question 15 of 20

16.

The relay logic and truth table shown in the figure above, represents a(n) ________.

NOR function

OR function

NAND function

AND function

Question 16 of 20

17. If the heater in a fixed IEC bimetallic overload relay fails, ________.

the heater must be replaced with a heater of the same size

the entire overload relay must be replaced

the heater can be replaced with a heater of the same size or one that is slightly smaller

it and all the other heaters in the overload relay must be replaced

Question 17 of 20

18.

In the figure above, the component marked 1 is a(n) ________.

overload contact

melting-alloy heater assembly

reset terminal

load terminal

Question 18 of 20

19.

In the figure above, symbol F represents a ________.

float switch

temperature switch

foot switch

pressure switch

Question 19 of 20

20.

In the figure above, symbol A represents a ________.

foot switch

float switch

temperature switch

pressure switch

Question 20 of 20

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