Quiz: Electrical Engineering

Exam: UPPSC-AE

Topic: Miscellaneous

Each question carries 1 mark.

Negative marking: 1/4 mark

Time: 10 Minute

Q1. At power frequencies, skin and proximity effects are………… frequency.

(a) Important at small

(b) Negligible at small

(c) Negligible at large

(d) Independent of

Q2. Transposition of conductors in large transmission lines results in

(a) Same average capacitance for various phase over the entire length of the conductor

(b) Same average inductance for various phase over the entire length of the conductor

(c) Same average capacitance and inductance for various phase over the entire length of the conductor

(d) Averaging is valid only for inductance and not capacitance

Q3. If the maximum current of a half-wave rectified wave is 10 A, its RMS value is given by

(a) 7.07 A

(b) 5.0 A

(c) 6.37 A

(D) 10 A

Q4. In a rectifier the ripple voltage is 150 mV and the dc value is 15 V, then ripple factor is given by:

(a) 0.01

(b) 0.02

(c) 0.001

(d) 0.002

Q5. What are the average and RMS values of half wave rectified output if peak voltage is 5 V?

(a) 1.59 V, 2.5 V

(b) 3.18 V, 2.5 V

(c) 1.59 V, 5 V

(d) 3.18 V, 5 V

Q6. In a common emitter configuration if β=100 and base current is 50 µA. Then the value of α is…………

(a) 0.88

(b) 0.99

(c) 0.89

(d) 0.9

Q7. The poorest voltage regulation exists in case of which of the following generators?

(a) Shunt generators

(b) Series generators

(c) Compound generators

(d) None of the above

Q8. What would be the value of pole pitch if there are 40 conductors and 4 poles?

(a) 10

(b) 40

(c) 16

(d) 160

Q9. The open – loop transfer function of a negative feedback is

G(s)H(s)=K/s(s+5)(s+12)

For ensuring system stability the gain K should be in the range

(a) 0<K<60

(b) 0<K<600

(c) 0<K<1020

(d) K>1020

Q10. A parallel RLC circuit resonates at 100 kHz. At frequency of 110 kHz, the circuit impedance will be

(a) Inductive

(b) Capacitive

(c) Resistive

(d) None of the above