Quiz: Electrical Engineering 02 Dec 2020

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

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

Q1. Which of the following is/are the requirements of a good transformer oil?
1. Low viscosity
2. Low volatility
3. High viscosity
4. High volatility
(a) Only 1 and 2
(b) Only 3 and 4
(c) Only 1 and 4
(d) Only 2 and 3

Q2. Which one of the following is the correct statement?
Field control of dc shunt motor gives…………….
(a) Constant KW drive
(b) Constant torque drive
(c) Constant speed drive
(d) Variable load speed drive

Q3. What is the flux density of a magnetic field whose flux is 1000 µWb and cross-sectional area is 0.5 m^2 ?
(a) 500 µT
(b) 5000 µT
(c) 50 µT
(d) 2000 µT

Q4. Iron losses in DC machine take place in:
(a) Yoke and armature only
(b) Armature core only
(c) Armature winding only
(d) Yoke only

Q5. If ‘t’ be the thickness of the lamination, then eddy current loss in generator will vary to:
(a) t
(b) t^2
(c) √t
(d) 1/t

Q6. The armature windings in a dc motor are placed on
(a) Stator only
(b) Rotor only
(c) Either stator or rotor
(d) None of the other options

Q7. While conducting short circuit test on a transformer the following side is short circuited:
(a) High voltage side
(b) Low voltage side
(c) Primary side
(d) Secondary side

Q8. Determine the Thevenin’s equivalent resistance (in ohms) across the terminal a and b for the electrical circuit given below.

(a) 1
(b) 0.5
(c) 0.3
(d) 0.2

Q9. Out of the three bulbs of 25 W, 40 W and 60 W, which one will have the lowest resistance?
(a) Both 40 W and 60 W bulbs
(b) 40 W bulb
(c) 60 W bulb
(d) 25 W bulb

Q10. A lamp produces average 25 C.P. The total flux produced by the lamp is:
(a) 300 Lumen
(b) 350 Lumen
(c) 314 Lumen
(d) 214 Lumen

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