Multiple Choice Questions (MCQ) on Basic Electrical Engineering

11-The time taken by an alternating quantity to complete one cycle:

(A) Time period

(B) Frequency

(C) Angular velocity

(D) Time constant

 

12-Specific gravity of a fully charged lead acid cell is approximately:

(A) 1.18

(B) 1.21

(C) 1.17

(D) 1.16

 

13-Illumination of a surface is inversely proportional to:

(A) Luminous intensity

(B) Distance from the source

(C) Square of the distance from the source

(D) Total Lumen

 

14-Speed of dc motor is directly proportional to ___ and inversely proportional to:

(A) flux, back emf

(B) current, back emf

(C) back emf, flux

(D) back emf, voltage

 

15-Inductive reactance of a coil having inductance 4 H:

(A) 796 x 10-6 Ω

(B) 1256 Ω

(C) 314 Ω

(D) 628 Ω

 

16-Generator efficiency is maximum when

(A) Variable loss is minimum

(B) Constant loss = Variable loss

(C) Constant loss is minimum

(D) Constant loss is half of the variable loss

 

17-Effective capacitance of capacitors connected in series, is

(A) C = C1 + C2 + C3 + C4 +……

(B) 1/C = 1/C1 +1/C2 + 1/C3 + 1/C4 +……

(C) C = 1/C1 + 1/C2 + 1/C3 + 1/C4 +……

(D) C = 1/C1 – 1/C2 + 1/C3 – 1/C4 +……

 

18-Which is active component?

(A) Capacitor

(B) Transistor

(C) Inductor

(D) Resistor

 

19-Form factor =

(A) rms value / average value

(B) average value / rms value

(C) rms value / peak value

(D) peak value / rms value

 

20-Admittance is the ___ of conductance and suspectance.

(A) Arithmetic mean

(B) Arithmetic difference

(C) Vector sum

(D) Reciprocal

 

ANSWERS:

11-(A), 12-(B), 13-(C), 14-(C), 15-(B), 16-(B), 17-(B), 18-(B), 19-(A), 20-(C)