CONTROL PANEL WIRING - Practice Mode

1) What is the purpose of control transformer used in control panel wiring?

To maintain constant terminal voltage To supply the power to the auxiliary circuits To control the supply voltage to the contactor To protect the control elements from over voltage fault

Correct Answer: To supply the power to the auxiliary circuits

2) How the contacts in a contactor can be engaged for working?

By manual operation By mechanical settings By operating electromagnet to change the position By using bimetallic strip to change the position

Correct Answer: By operating electromagnet to change the position

3) Which device prevents flare out of stripped and stranded cables in the panel board?

Sleeves Wire ferrules Lugs and thimbles Cable binding straps and button

Correct Answer: Lugs and thimbles

4) How to protect the cable from insects and rats into the panel?

By using sleeve By using Grommets By using cable binding straps By providing nylon cable ties

Correct Answer: By using Grommets

5) What essential feature to be considered while designing a layout of control panel?

Proper type of protection and measuring system Inside area and number of indicating lights in front panel Suitable method of labelling and cable harnessing Outside dimensions and swing area of cabinet door

Correct Answer: Outside dimensions and swing area of cabinet door

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