Quiz: Electrical Engineering 10 Apr 2021

Quiz: Electrical Engineering
Exam: RVUNL-JE
Topic: Miscellaneous

Each question carries 1 mark.
Negative marking: 1/4 mark
Time: 10 Minute

Q1. A synchronous generator connected to an infinite bus delivers power at lagging power factor. If its field excitation is increased, then
(a) Active power increases
(b) Terminal voltage increases
(c) Power factor increases
(d) Current deliver increases

Q2. Regulation of an alternator supplying resistive or inductive load is:
(a) Zero
(b) Always positive
(c) Always negative
(d) Infinity

Q3. In a 4-pole, 20KW, 200V wave wound DC shunt generator, the current in each parallel path will be
(a) 25A
(b) 10A
(c) 50A
(d) 100A

Q4. The speed regulation of a synchronous motor is
(a) Zero
(b) Unity
(c) Infinity
(d) Greater than one

Q5. In case of core type transformer which type of winding is done near the core?
(a) Primary winding
(b) Secondary winding
(c) Low voltage
(d) High voltage

Q6. A current impulse of 5 δ(t), is forced through a capacitor C. The voltage V_c (t) across the capacitor is given by:
(a) 5/C t
(b) (5 u(t))/C
(c) 5 t
(d) 5 u(t)-C

Q7. In an ideal op-amp, which is not true?
(a) Open loop voltage gain is infinite
(b) Input resistance is infinite
(c) Slew rate is infinite
(d) CMRR is zero

Q8. A half wave diode circuit using an ideal diode has an input voltage 20 sin ωt volts. Then average and rms values of output voltage are ………… and ……………
(a) 10/π v and 10 v
(b) 10/π v and 20 v
(c) 20/π v and 10 v
(d) 20/π v and 20 v

Q9. Transient state analysis depends on which of the following?
(a) Type of the system
(b) Order of the system
(c) Both a and b
(d) None of the above

Q10. A second order control system has a transfer function 16/(s^2+4s+16). Find the settling time for 2% tolerance?
(a) 2 sec.
(b) 5 sec.
(c) 10 sec.
(d) 20 sec.

solutions

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