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Switches Quiz Questions Answers
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Question 1 of 20
1. Question
1 pointsWhich of the following enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose directed water
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Question 2 of 20
2. Question
1 points_____ are small-capacity switches in which the circuit is made or broken with a quick motion independent of the speed of operation of the switch by the operator.
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Question 3 of 20
3. Question
1 pointsWhich of the following switches are used extensively as the switching element for motor controllers
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Question 4 of 20
4. Question
1 pointsA single-break switch, in opening, breaks each pole of the circuit at only one point.
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Question 5 of 20
5. Question
1 pointsWhich one of the following switch will have higher life time:
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Double Breaking Switch breaks the circuit in two places doubles the quenching effect of the switch in suppressing the arc. This reduction in the arcing at the contacts prolongs the life of the contacts
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Question 6 of 20
6. Question
1 pointsWhich one the following switch is used in Transformer Tap Changing:
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Question 7 of 20
7. Question
1 pointsSwitches can be operated by:
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Question 8 of 20
8. Question
1 pointsWhich of the following switches are used for motor-starting, control, and instrument switching applications
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Question 9 of 20
9. Question
1 pointsA good switch is to maintain a good ____ contact in the closed position.
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Question 10 of 20
10. Question
1 pointsThe contact surfaces of the switches are frequently _____ plated to prevent oxidation and reduce contact resistance
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Question 11 of 20
11. Question
1 pointsMercury Contact Switch operates by the flow of mercury and contact with stationary contact element:
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Question 12 of 20
12. Question
1 pointsA Double throw switches make a closed circuit only when the switch is thrown in one position.
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Question 13 of 20
13. Question
1 pointsThe number of switch blades or contacts for a solid neutral switch is one less than the number of conductors of the circuit
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Question 14 of 20
14. Question
1 pointsWhich of the following protection device is usually employed with switch circuit:
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Question 15 of 20
15. Question
1 pointsWhich of the following switches are usually employed in the heaviest-duty service with respect to both frequency of operation and current capacity for handling heavy overloads.
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Question 16 of 20
16. Question
1 pointsTest for good blade contact can be made by trying to insert a ‘‘feeler,’’ a leaf of very thin steel, mica, or paper, between the jaws and the blade at the corners and sides.
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Question 17 of 20
17. Question
1 pointsFor High Capacity Fused Switches which of the following type of fuse is used:
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Question 18 of 20
18. Question
1 pointsThe motor circuit switches shall have the capacity to interrupt overload current of ___ times the rated current in case of AC Motors
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Question 19 of 20
19. Question
1 pointsWhich one of the following is service switch:
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Question 20 of 20
20. Question
1 pointsWiring switches are employed in interior-wiring installations for the control of branch circuits and individual lamps or appliances
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