26311-11 Motor Controls

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

1, 1E

1A, 2, 3, 10

1A, 1B, 9

1E, 15

Question 1 of 20

In the figure above, symbol A represents a ________.

float switch

temperature switch

foot switch

pressure switch

Question 2 of 20

3. 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

five or more pushbutton stations

four or more pushbutton stations

three or more pushbutton stations

Question 3 of 20

4. 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 4 of 20

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

overload contacts

melting-alloy heater assemblies

load terminals

reset terminals

Question 5 of 20

6. 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?

3.25A

2.25A

1.75A

1.15A

Question 6 of 20

7. 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

Lighting contactors

Definite-purpose contactors/motor starters

IEC-rated contactors/motor starters

Question 7 of 20

8. Which of the following describes a retroreflective scan?

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 receiver responds only to depolarized light reflected from a corner cube reflector or polarized sensitive tape

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

Question 8 of 20

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

is a double-break type

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

is a single-throw type

has three N.O. (normally open) contacts

Question 9 of 20

10.

In the figure above, symbol F represents a ________.

pressure switch

temperature switch

foot switch

float switch

Question 10 of 20

11.

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

NAND function

AND function

OR function

NOR function

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 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 12 of 20

13.

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

load terminal

overload contact

reset terminal

melting-alloy heater assembly

Question 13 of 20

14. NEC Article 430, Part VII covers ________.

motor and controller circuit overload protection

motor circuits involving special equipment and hazardous locations

motor controllers

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

Question 14 of 20

15.

In the figure above, symbol E represents a ________.

float switch

temperature switch

pressure switch

foot switch

Question 15 of 20

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

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

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

Question 16 of 20

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

contact arc suppression

overvoltage protection

speed regulation

sequencing and automatic operation within certain parameters

Question 17 of 20

18. Jogging is also referred to as ________.

inching

stepping

plugging

throttling

Question 18 of 20

19.

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

C108G

C108J

C108H

C108K

Question 19 of 20

20. 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 20 of 20

TAP Services

Mailing List

Quick Nav

TAP Services

	FOLLOW US ON SOCIAL MEDIA

TAP Services

Mailing List

Quick Nav

Get Social

TAP Services