Quiz: Electrical Engineering
Exam: UPSSSC JE
Topic: Machines
Each question carries 1 mark.
Negative marking: 1/4 mark
Time: 10 Minute
Q1. The current transformer burden is expressed in
(a) watt
(b) VA
(c) Rated secondary current
(d) Voltage rating of secondary current
Q2. The commutator of a DC generator performs as:
(a) Amplifier
(b) Rectifier
(c) Load
(d) Multiplier
Q3. In a capacitor start single phase induction motor, the current in the
(a) supply lines leads the voltage
(b) starting winding lags the voltage
(c) main winding leads the current
(d) starting winding leads the voltage
Q4. A synchronous motor can be used as synchronous condenser when it is
(a) over excited
(b) over loaded
(c) under excited
(d) under loaded
Q5. As the load is increased, the speed of a shunt motor
(a) remains constant
(b) increases proportionately
(c) reduces slightly
(d) increases slightly
Q6. Which of the following motors is preferred for tape recorders?
(a) hysteresis motor
(b) two value capacitor motor
(c) universal motor
(d) shaded pole
Q7. The no load input power to a transformer is practically equal to loss in the transformer
(a) windage
(b) eddy current
(c) copper
(d) iron
Q8. Which of the following motor is non- self-starting?
(a) DC slip motor
(b) Slip ring Induction motor
(c) Synchronous motor
(d) Squirrel cage induction motor
Q9. The capacitance of a parallel plate capacitor is not influenced by:
(a) thickness of conducting plate
(b) area of conducting plate
(c) distance separating the plates
(d) nature of the dielectric between the plates
Q10. An ideal voltage source should have:
(a) infinite source resistance
(b) large value of emf
(c) small value of emf
(d) zero source resistance
Solution
S1. Ans(b)
Sol. VA
S2. Ans(b)
Sol. Rectifier
S3. Ans(d)
Sol. Starting winding leads the voltage
S4. Ans(a)
Sol. Over excited
S5. Ans(c)
Sol. Reduces slightly
S6. Ans(a)
Sol. Hysteresis motor
S7. Ans(d)
Sol. The no load input power to a transformer is practically equal to iron loss in the transformer
S8. Ans(c)
Sol. Synchronous motor
S9. Ans(a)
Sol. Thickness of conducting plate
S10. Ans(d)
Sol. Zero source resistance
