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Electrical Engineering Interview questions and answers

Electrical Engineering Interview questions

polyphase induction motor

How the gap between stator and rotor affects the power factor of a polyphase induction motor?

Answers No Answers In: Electrical Engineering By: [2 Grey Star Level] Jun 21, 2012

In a star connected three phase transformer the

a) Three phases are connected together at the start point b) Three phases are separate c) Neutral conductor is connected to a single phase d) Neutral conductor is electrically separated

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

A single-phase double-wound transformer consists of

a) A single core mounted winding b) A winding that carries the difference between IP and IS c) A single solid core d) Two electrically separated coils

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

One method of insulating windings is to use

a) Shelac b) High reluctance silicon steel c) Low frequency dust cores d) PVC

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

The usual method of insulating core laminations is

a) Low reluctance silicon steel b) Surface oxidization c) High frequency air cores d) Cellulose paper

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

If a motor is required to start against a large starting current, it is usual to use

a) Direct on line starter b) Face plate starter c) Step down centre tapped starter d) Rotor resistance starter

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

In a shunt-wound motor the field coil is connected in

a) Series with the armature b) Series with the motor c) parallel with the armature d) parallel with the motor

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

When the field windings of an electrical machine are not connected to its own armature, it is known as

a) Self- excited b) Polyphase c) Separately-excited d) Synchronous

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

Particular starting arrangements are used when a motor has a rating greater than

a) 370 microwatts b) 0.37 watts c) 37 watts d) 370 watts

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

An isolator built into a panel is used for

a) Normal load switching b) Fault load switching c) Short circuit protection d) No load switching

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

A device with a BS EN number has been

a) Agreed for use only within the UK b) Agreed for operational use within the EU c) Standardized for all operational uses only in the UK d) Standardized for use in the EU

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

Q8 BS 7671 provides appropriate advice on

a) Heights of panels b) Design of panels c) Environmental conditions d) Instrumentation

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

Which of the following is statutory?

a) BS 7671 b) On-Site Guide c) Electricity at Work Regulations d) GS 38

Answers 1 Answer In: Electrical Engineering By: [ Grey Star Level] Apr 24, 2012

Electrical Engineering Interview questions

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