7/28/2019 Module 3B

1/1

(NEETS) MODULE 3 CIRCUIT PROTECTION DEVICES ASSIGNMENT 2

1

1. Circuit control devices should NOT be used for which ofthe following reasons?

A. To adjust the power level of a device *B. To remove power from a malfunctioning deviceC. To apply power to a device when work is completed

on itD. To select the function or circuit desired within a

device

2. Which of the following are types of circuit controldevices?

A. Relays C. SolenoidsB. Switches D. All of the above *

3. Which of the following is a manual switch?

A. A light switch * C. A thermostatB. A limit switch D. A distributor

4. Which of the following is an automatic switch?

A. An ignition switch on a motor vehicle *B. A switch that turns on a light in a refrigeratorC. A channel selector on a televisionD. A dial or push button on a telephone

5. Control or selection of one or more circuits is a functionof which of the following switches?

A. A manual switchB. An automatic switchC. A multicontact switch *D. A single contact switch

6. A switch actuator is described by which of the followingterms?

A. Momentary C. Toggle *B. Two-position D. Four-position

7. What is the maximum number of different single-pole,single throw switch positions possible?

A. One C. ThreeB. Two D. Four

8. What is the maximum number of different single-pole,double throw switch positions possible?A. One C. Three *B. Two D. Four

9. Control of a circuit requiring a temporary actuationsignal is provided by which of the following switches?A. Momentary * C. Locked-outB. Locked-in D. Rotary

10. To guard against the accidental actuation of a circuit,which of the following types of switches are used?

A. Momentary C. Locked-out *B. Locked-in D. Rotary

11. To guard against the accidental turning off of a circuit,which of the following types of switches are used?

A. Momentary B. Locked-in *C. Locked-out D. Rotary

12. What is the common name for an accurate snap-actingswitch?

A. Maxiswitch C. MiniswitchB. Multiswitch D. Microswitch *

13. Designation of switch current rating is based on whichof the following current values?

A. Maximum * C. Nominal

B. Minimum D. Average

14. Designation of switch voltage rating is based on whichof the following voltage values?A. Maximum * C. NominalB. Minimum D. Average

15. Checking a switch with the circuit power NOT applied isaccomplished by using which of the following meters?

A. Wattmeter C. Temperature meterB. Frequency meter D. Ohmmeter *

16. Checking a switch with the power applied isaccomplished by using which of the following meters?

A. Megger C. WattmeterB. Ohmmeter D. Voltmeter *

17. When you perform preventive maintenance on a switch,which of the following items should be checked?

A. The terminals for corrosionB. The physical condition of the switchC. The switch operation for smooth and correct

operationD. All of the above *

18. A solenoid is based upon which of the followingprinciples?

A. A bimetallic strip bends when it is heatedB. A thermocouple produces a current when heatedC. A coil attracts a soft iron core when current flows in

the coil *D. A soft iron core moving in a magnetic field creates a

current

19. A solenoid is commonly used in which of the followingdevices?

A. A fuel quantity indicating systemB. A shipboard lighting systemC. A sound-powered telephone systemD. A starter for a motor vehicle *

20. If a solenoid is not operating properly, which of thefollowing items need NOT be checked?

A. Coil C. PlungerB. Armature * D. Energizing voltage

21. If a relay is hermetically sealed with an opaque cover,which of the following methods should be used todetermine whether the relay is operating?

A. Shake the relay and listen for loose partsB. Place your finger on the cover and feel the relay

contact movement *C. Remove the cover and visually observe the relay

contacts when the relay is activatedD. Activate the relay and observe whether a metal

object is attracted by the magnetic field

22. If a relay is NOT operating properly, which of thefollowing items need NOT be checked?

A. The armature resistanceB. The terminal leadsC. The contact surfacesD. The contact spacing *

23. What should be used to clean the contacts of a relay?

A. Sandpaper C. A jelwelers fileB. Emery cloth D. A burnishing tool *

24. What should be used to adjust contact clearances on arelay?A. A point bender *B. A burnishing toolC. A pair of pliersD. A pair of hemostats