# Quiz: Electrical Engineering 22 April 2020

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

(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

(c)  under excited

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

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

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