Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

1.

When the 3-phase system is not grounded and if Single Line to Ground fault occurs, the voltage of the other two healthy phases will____________?
A. Increases
B. Decreases
C. Remains unaffected
Answer» B. Decreases
Discussion
2.

For an EHV equipment for maintenance first it should be isolated and connected to ground because_____________?
A. to provide low impedance
B. to discharge the charging capacitance to ground
C. protection for operating personnel
D. both (B) and (C)
Answer» E.
Discussion
3.

Average resistance of human body is____________?
A. 500 ohms
B. 1000 ohms
C. 1500 ohms
D. 2000 ohms
Answer» C. 1500 ohms
Discussion
4.

Ground resistance should be designed such that_____________?
A. grounding resistance should be as low as possible
B. grounding resistance should be as high as possible
C. grounding resistance should be always zero
D. none of the above
Answer» B. grounding resistance should be as high as possible
Discussion
5.

When earth fault occurs______________?
A. voltage potential at the earth mat increases due to grounding
B. voltage potential at the earth mat decreases due to grounding
C. voltage potential at the earth mat remains zero irrespective of fault
D. none of the above
Answer» B. voltage potential at the earth mat decreases due to grounding
Discussion
6.

Moisture content in the soil __________ the earth soil resistance?
A. increase
B. decrease
C. does not affect
D. none of the above
Answer» C. does not affect
Discussion
7.

The objective of earthing or grounding is_______________?
A. to provide as low resistance possible to the ground
B. to provide as high resistance possible to the ground
C. to provide flow of positive, negative and zero sequence currents
D. none of the above
Answer» B. to provide as high resistance possible to the ground
Discussion
8.

Factors on which soil resistance depends_______________?
A. depth of the electrode
B. moisture
C. Nacl
D. all the above
Answer» E.
Discussion
9.

Generally grounding is provided for
A. only for the safety of the equipment
B. only for the safety of the operating personnel
C. both (A) and (B)
D. none of the above
Answer» D. none of the above
Discussion
10.

The size of the earth or ground wire is based on the______________?
A. maximum fault current carrying through the ground wire
B. rated current carrying capacity of the service line
C. depends on the soil resistance
D. both (A) and (C)
Answer» E.
Discussion