26311-11 Motor Controls

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

C108J

C108H

C108G

C108K

Question 1 of 20

In the figure above, symbol E represents a ________.

temperature switch

foot switch

float switch

pressure switch

Question 2 of 20

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

overload contact

reset terminal

load terminal

melting-alloy heater assembly

Question 3 of 20

4. 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?

2.25A

1.75A

1.15A

3.25A

Question 4 of 20

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

1A, 2, 3, 10

1, 1E

1E, 15

1A, 1B, 9

Question 5 of 20

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

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

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

the entire overload relay must be replaced

Question 6 of 20

In the figure above, symbol F represents a ________.

temperature switch

float switch

foot switch

pressure switch

Question 7 of 20

8. 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?

200%

300%

125%

250%

Question 8 of 20

In the figure above, symbol A represents a ________.

temperature switch

pressure switch

foot switch

float switch

Question 9 of 20

10. Jogging is also referred to as ________.

throttling

inching

plugging

stepping

Question 10 of 20

11. NEC Article 430, Part VII covers ________.

motor controllers

motor and controller circuit overload protection

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

motor circuits involving special equipment and hazardous locations

Question 11 of 20

12. 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 ________.

three or more pushbutton stations

four or more pushbutton stations

two or more pushbutton stations

five or more pushbutton stations

Question 12 of 20

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

NEMA-rated contactors/motor starters

Definite-purpose contactors/motor starters

Lighting contactors

IEC-rated contactors/motor starters

Question 13 of 20

14.

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

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

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

provide memory for the Start switch

provide memory for the float switch

Question 14 of 20

15.

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

overload contacts

load terminals

melting-alloy heater assemblies

reset terminals

Question 15 of 20

16. Which of the following describes a retroreflective scan?

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

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

Question 16 of 20

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

dropout voltage

seal-in voltage

transition voltage

pickup voltage

Question 17 of 20

18. 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 18 of 20

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

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

is a double-break type

has three N.O. (normally open) contacts

is a single-throw type

Question 19 of 20

20.

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

OR function

NOR function

NAND function

AND function

Question 20 of 20

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