Quiz: Electrical Engineering
Exam: UPPSC AE
Topic: Power System
Each question carries 1 mark.
Negative marking: 1/4 mark
Time: 10 Minute
Q1. The lightning arrestor is usually located nearer to
(a) bush bar
(b) Transformer
(c) circuit breaker
(d) isolator
Q2. The main function of relay is
(a) fault isolation
(b) fault detection
(c) fault prevention
(d) All of the above
Q3. Mho relay is normally used for the protection of
(a) long Transmission lines
(b) medium length line
(c) short length lines
(d) No length criteria
Q4. Earth fault relay are
(a) directional relays
(b) non-directional relays
(c) short operate time relays
(d) long operate time relays
Q5. The rating of Fuse is expressed in terms of
(a) amperes
(b) Volts
(c) VAR
(d) KVA
Q6. By burden of the relay we mean
(a) volt ampere rating of the relay
(b) current rating of relay
(c) voltage rating of relay
(d) watt rating of relay
Q7. In electric motor cooling; TEFC means
(a) total efficient fan cooled
(b) totally enclosed fan cooled
(c) thermal energy fan cooled
(d) tough energy fan cooled
Q8. The type of oil used in transformer is
(a) olive
(b) mineral
(c) coconut
(d) palm
Q9. In a synchronous motor hunting takes place
(a) when load varies
(b) motor is under loaded
(c) when power factor is unity
(d) when supply voltage fluctuates
Q10. If the field of a synchronous motor is under excited, the power factor will be
(a) lagging
(b) leading
(c) unity
(d) zero
Solutions
S1. Ans. (b)
Sol. Transformer
S2. Ans. (b)
Sol. Fault detection
S3. Ans. (a)
Sol. Long transmission line
S4. Ans. (c)
Sol. Short operate time relay
S5. Ans. (a)
Sol. Ampere
S6. Ans. (a)
Sol. Volt ampere rating of relay
S7. Ans. (b)
Sol. totally enclosed fan cooled
S8. Ans. (b)
Sol. Mineral
S9. Ans. (a)
Sol. When load varies
S10. Ans. (a)
Sol. Lagging
