COMMERCIAL WIRING 2 - Practice Mode

1) Which system of wiring enables the appliances connected to the system to have same voltage?

Ring main system Raising main system Distribution board system Tree system

Correct Answer: Distribution board system

2) How many earths are to be provided along with the vertical run of raising mains in commercial building wiring?

1 2 3 4

Correct Answer: 2

3) Which load is to be given separate lines as essential in commercial wiring?

Stair case and garden Verandah and portico Common walking area Lift and water supply

Correct Answer: Lift and water supply

4) Which is the purpose of layout diagram used for building installation?

To locate the position of electrical points in each used in the building To calculate the total connected load To estimate the labour cost for wiring To estimate the material cost for wiring installation

Correct Answer: To locate the position of electrical points in each used in the building

5) How much starting current of motor with respect to load current for calculation of cable size?

One time of full load current One and half time of full load current Two times of full load current Three times of full load current

Correct Answer: Three times of full load current

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