13) What should be the resistance between a water heater's body and the connecting cable as per ISI ?

Answer is:

Not less than 0.5 mega ohms

Electrical Appliances MCQ - Electrician (Set-1) with Answers

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Related Electrical Appliances MCQ - Electrician (Set-1) with Answers

14) Why it is not possible to do the troubleshooting in electrical equipments having short-circuit, with the operating voltage ?

The high short-circuit current could destroy the measuring instrument

The over current protection connected on the supply side will operate and disconnect the supply

Dangerous electric arcs may be produced because of high short-circuit voltage

The high short-circuit current may overload the supply source

Answer is:

The high short-circuit current could destroy the measuring instrument

15) Sweep of ceiling fan refers to :

Answer is:

double the distance from centre of motor to tip of the blade

Explanation:

Ceiling fans are measured by the full size of their blade span (also called blade sweep), which is the diameter of the circle that you see when the fan blades are in motion. Or, in other words, fan blade span reaches from the tip of one fan blade to the tip of the blade directly across, also Sweep of ceiling fan refers to double the distance from centre of motor to tip of the blade.

16) If a table fan does not respond to the operation of the speed selector switch, the problem may be that the :

Answer is:

regulator is short-circuit

17) If a table fan running smoothly starts giving up smoke, the reason is :

Answer is:

short-circuited winding

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