Industrial Wiring Practice Set 2

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Which place the control ON/OFF switches is to be placed a industrial motor wiring?

  

    (A) Near the control panel

    (B) Near the input main

    (C) Near the entrance

    (D) Near the motor

Near the motor

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Why over load relay coil is wound with thick gauge of copper wire?

  

    (A) To carry the line voltage

    (B) To reduce voltage drop

    (C) To carry load current

    (D) To reduce the power loss

To carry load current

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Which is the purpose of single phasing preventor in 3 phase motor circuit?

  

    (A) To protect the motor from damage

    (B) To run the motor continuously at single phasing

    (C) To regulate the supply voltage

    (D) To protect the motor from over load

To protect the motor from damage

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What is the formula to calculate the value of insulation resistance while testing the wiring?

  

    (A) I.R = (Leakage Current/supply Voltage)

    (B) I.R = (Load Current/supply Voltage)

    (C) I.R = (supply Voltage/Leakage Current)

    (D) I.R = (supply Voltage/Load Current)

I.R = (supply Voltage/Leakage Current)

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Which is the unit of insulation resistance?

  

    (A) Milli ohm

    (B) Ohm

    (C) kilo ohm

    (D) Mega ohm

Mega ohm

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