COMMERCIAL WIRING 2 - Practice Mode

1) Which is to be considered to select the size of ECC for earthing to service meter?

Supply voltage from supplier side Type of wiring installation done in the system Current carrying capacity of installation Type of wiring material used

Correct Answer: Current carrying capacity of installation

2) Which material is used to prepare heating element?

Copper Aluminium Nichrome Silver

Correct Answer: Nichrome

3) Which material, the heater plate is made of?

Porcelain Ceramic Ebonite Bakelite

Correct Answer: Porcelain

4) Where the heating element is placed in an immersion type heater?

Near the outer seating Inside a hollow tube Out side the body Below the body

Correct Answer: Inside a hollow tube

5) Why the grooves are designed with projection in heater plate?

For the uniform distribution of heat To prevent the heating element from coming out of grooves To reduce the space for coiled heating element To increase the resistance of the heating element

Correct Answer: To prevent the heating element from coming out of grooves

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