Electrical Engineering Interview Questions & Answers Download PDF
Optimize your Electrical Engineering interview preparation with our curated set of 105 questions. Our questions cover a wide range of topics in Electrical Engineering to ensure you're well-prepared. Whether you're new to the field or have years of experience, these questions are designed to help you succeed. Download the free PDF now to get all 105 questions and ensure you're well-prepared for your Electrical Engineering interview. This resource is perfect for in-depth preparation and boosting your confidence.
105 Electrical Engineering Questions and Answers:
Electrical Engineering Job Interview Questions Table of Contents:
1 :: Basic difference between transformer and inducter?
An inductor can store the energy but an ideal transformer does not store the energy.
2 :: 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
Answer – a
* b) Three phases are separate
* c) Neutral conductor is connected to a single phase
* d) Neutral conductor is electrically separated
Answer – a
3 :: 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
Answer – d
* b) A winding that carries the difference between IP and IS
* c) A single solid core
* d) Two electrically separated coils
Answer – d
4 :: One method of insulating windings is to use
* a) Shelac
* b) High reluctance silicon steel
* c) Low frequency dust cores
* d) PVC
Answer – a
* b) High reluctance silicon steel
* c) Low frequency dust cores
* d) PVC
Answer – a
5 :: The usual method of insulating core laminations is
* a) Low reluctance silicon steel
* b) Surface oxidization
* c) High frequency air cores
* d) Cellulose paper
Answer – b
* b) Surface oxidization
* c) High frequency air cores
* d) Cellulose paper
Answer – b
6 :: 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
Answer – d
* b) Face plate starter
* c) Step down centre tapped starter
* d) Rotor resistance starter
Answer – d
7 :: 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
Answer – c
* b) Series with the motor
* c) parallel with the armature
* d) parallel with the motor
Answer – c
8 :: 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
Answer – c
* b) Polyphase
* c) Separately-excited
* d) Synchronous
Answer – c
9 :: With a star-delta starter, the windings are brought out to a terminal box. The voltage applied to the windings at starting is
* a) VL ÷ v3
* b) VL x v3
* c) VPhase ÷ v3
* d) VPhase x v3
Answer – a
* b) VL x v3
* c) VPhase ÷ v3
* d) VPhase x v3
Answer – a
10 :: 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
Answer – d
* b) 0.37 watts
* c) 37 watts
* d) 370 watts
Answer – d
11 :: 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
Answer – d
* b) Fault load switching
* c) Short circuit protection
* d) No load switching
Answer – d
12 :: 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
Answer – d
* 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
Answer – d
13 :: Q8 BS 7671 provides appropriate advice on
* a) Heights of panels
* b) Design of panels
* c) Environmental conditions
* d) Instrumentation
Answer – c
* b) Design of panels
* c) Environmental conditions
* d) Instrumentation
Answer – c
14 :: What degree of protection is specified for protection against a BS finger?
* a) IP4XB
* b) IP5XB
* c) IP6XB
* d) IPXXB
Answer – d
* b) IP5XB
* c) IP6XB
* d) IPXXB
Answer – d
15 :: Which of the following is statutory?
* a) BS 7671
* b) On-Site Guide
* c) Electricity at Work Regulations
* d) GS 38
Answer – c
* b) On-Site Guide
* c) Electricity at Work Regulations
* d) GS 38
Answer – c
16 :: Which of the following are appropriate tests for a completed panel?
* a) Flash testing of components
* b) Insulation resistance and polarity
* c) Inspection of conductors for current carrying capacity
* d) Identification of conductors
Answer – b
* b) Insulation resistance and polarity
* c) Inspection of conductors for current carrying capacity
* d) Identification of conductors
Answer – b
17 :: The purpose of a switch is to open or close a circuit
* a) In the event of a fault current
* b) Under load conditions
* c) Under overload conditions
* d) Automatically after a fault has been repaired
Answer – b
* b) Under load conditions
* c) Under overload conditions
* d) Automatically after a fault has been repaired
Answer – b
18 :: A common type of cable termination used for ribbon cables in panel building is
* a) Pin
* b) Lug
* c) Insulation displacement
* d) Screw
Answer – c
* b) Lug
* c) Insulation displacement
* d) Screw
Answer – c
19 :: A moving coil meter is not used on an ac circuit because
* a) It cannot read very small variations
* b) The direction of the deflection depends upon the direction of the current
* c) It is non linear
* d) It does not use the damping effect
Answer – b
* b) The direction of the deflection depends upon the direction of the current
* c) It is non linear
* d) It does not use the damping effect
Answer – b
20 :: To ensure safe isolation, voltage indicating devices
* a) Must comply with BS 7671
* b) Are used to prove the circuit dead only
* c) Are used to prove the circuit was alive only
* d) Must be “proved” prior to and “re-proved” after isolation
Answer – d
* b) Are used to prove the circuit dead only
* c) Are used to prove the circuit was alive only
* d) Must be “proved” prior to and “re-proved” after isolation
Answer – d
21 :: Which of the following is not a factor, which would affect the type of termination?
* a) Circuit design current
* b) Physical space around terminations
* c) Presence of solid foreign bodies
* d) Size of conductor
Answer – c
* b) Physical space around terminations
* c) Presence of solid foreign bodies
* d) Size of conductor
Answer – c
22 :: Which of the following has an adverse effect on installed equipment?
* a) Eddy current damping
* b) Air damping
* c) Ambient temperature
* d) Operating temperature
Answer – c
* b) Air damping
* c) Ambient temperature
* d) Operating temperature
Answer – c
23 :: The purpose of a visual inspection is to ensure compliance with BS 7671, Section
* a) 601
* b) 712
* c) 413
* d) 314
Answer – b
* b) 712
* c) 413
* d) 314
Answer – b
24 :: The purpose of a method statement is to
* a) Ensure compliance with BS 7671
* b) Identify a safe working practice
* c) Provide a training document for staff
* d) Provide instructions to be followed at all times
Answer – b
* b) Identify a safe working practice
* c) Provide a training document for staff
* d) Provide instructions to be followed at all times
Answer – b
25 :: Electrostatic sensitive equipment, in transit, need not be protected against damage from
* a) High temperature
* b) Dust and fibers
* c) Moisture ingress
* d) Day light
Answer – d
* b) Dust and fibers
* c) Moisture ingress
* d) Day light
Answer – d
