Basic Electrical Engineering (3110005) MCQs

MCQs of Electrical Installations

Showing 1 to 10 out of 83 Questions
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1.
The main function of a fuse is to
(a) protect the line
(b) open the circuit
(c) protect the appliance
(d) prevent excessive currents
Answer:

Option (d)

2.
A fuse is connected
(a) in series with circuit
(b) in parallel with circuit
(c) either in series or in parallel with circuit
(d) none of the above
Answer:

Option (a)

3.
H.R.C. fuse, as compared to a rewirable fuse, has
(a) no ageing effect
(b) high speed of operation
(c) high rupturing capacity
(d) all of the above
Answer:

Option (d)

4.
The fuse rating is expressed in terms of
(a) current
(b) voltage
(c) VAR
(d) kVA
Answer:

Option (a)

5.
The fuse blows off by
(a) burning
(b) arcing
(c) melting
(d) none of the above
Answer:

Option (c)

6.
On which of the following effects of electric current a fuse operates?
(a) Photoelectric effect
(b) Electrostatic effecct
(c) Heating effect
(d) Magnetic effect
Answer:

Option (c)

7.
A fuse in a motor circiut provides protecction against
(a) overload
(b) short-circuit and overload
(c) open-circuit, short-circuit and overload
(d) none of the above
Answer:

Option (b)

8.
Protecction by fuses is generally not used beyond
(a) 20 A
(b) 50 A
(c) 100 A
(d) 200 A
Answer:

Option (c)

9.
A short circuit is identified by
(a) no current flow
(b) heavy current flow
(c) voltage drop
(d) voltage rise
Answer:

Option (c)

10.
A switchgear is device used for
(a) interrupting an electrical circuit
(b) switching an electrical circuit
(c) switching and controlling an electrical circuit
(d) switching, controlling and protecting the electrical circuit an equipment
Answer:

Option (d)

Showing 1 to 10 out of 83 Questions
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