Engineering Jobs   »   Quiz: Electrical Engineering 13 Mar 2021

# Quiz: Electrical Engineering 13 Mar 2021

Quiz: Electrical Engineering
Exam: SSC JE
Topic: Miscellaneous

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

Q1. The secondary coil of an ideal 2:1 transformer has a 2 F capacitor connected across its terminals. The referred impedance on the primary side is of an element:
(a) L=8 H
(b) C=8 F
(c) L=0.5 H
(d) C=0.5 F

Q2. A 3 H inductor has 2000 turns. How many turns must be added to increase the inductance to 5 H?
(a) 582
(b) 2582
(c) 2500
(d) 1000

Q3. A 0-200 V voltmeter has an accuracy of 0.75% of full-scale reading. If voltage measured is 100 V, the error is:
(a) 3%
(b) 2%
(c) 1.5%
(d) .75

Q4. In the indirect method of lighting about how much percentage of light falls on the surface?
(a) 10 %
(b) 50 %
(c) 75 %
(d) 90 %

Q5. Lumen/ watt is the unit of
(a) Light flux
(b) Luminous intensity
(c) Brightness
(d) Luminous efficiency

Q6. DC average current of a half wave rectifier output is _
(Where I_m is the maximum peak current of input)
(a) 2Im/ᴨ
(b) Im/ᴨ
(c) Im/2ᴨ
(d) 1.414Im/ᴨ

Q7. Ripple factor of half wave rectifier is _
(a) 1.414
(b) 1.21
(c) 1.3
(d) 0.48

Q8. The pull-out torque of a practical synchronous motor will occur when the torque angle is about ………
(a) 0°
(b) 30°
(c) 45°
(d) 75°

Q9. For a given load, the normal field excitation of synchronous motor is that which gives ……. Power factor.
(b) 0.8 lagging
(c) unity
(d) none of the above

Q10. For a given load, the armature current of a synchronous motor will be minimum for ………. Power factor.
(a) unity