Which 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

_____ 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.

Which of the following switches are used extensively as the switching element for motor controllers

A single-break switch, in opening, breaks each pole of the circuit at only one point.

Which one of the following switch will have higher life time:

Which one the following switch is used in Transformer Tap Changing:

Switches can be operated by:

Which of the following switches are used for motor-starting, control, and instrument switching applications

A good switch is to maintain a good ____ contact in the closed position.

The contact surfaces of the switches are frequently _____ plated to prevent oxidation and reduce contact resistance

Mercury Contact Switch operates by the flow of mercury and contact with stationary contact element:

A Double throw switches make a closed circuit only when the switch is thrown in one position.

The number of switch blades or contacts for a solid neutral switch is one less than the number of conductors of the circuit

Which of the following protection device is usually employed with switch circuit:

Which 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.

Test 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.

For High Capacity Fused Switches which of the following type of fuse is used:

The motor circuit switches shall have the capacity to interrupt overload current of ___ times the rated current in case of AC Motors

Which one of the following is service switch:

Wiring switches are employed in interior-wiring installations for the control of branch circuits and individual lamps or appliances