Basic Electrical Engineering Questions

11-Britannia joint is used in:

(A) Underground cables

(B) Conduct wiring

(C) Concealed wiring

(D) O.H. Lines

 

12-The main function of starter of the DC Motor is to:

(A) Limit the starting current

(B) Limit the back emf

(C) Increase the field circuit resistance

(D) Decrease armature resistances

 

13-Which meter is used to measure the power?

(A) Power factor meter

(B) Ammeter

(C) Watt meter

(D) Multimeter

 

14-The potential difference that causes the breakdown of insulation is called:

(A) Dielectric strength

(B) Insulation resistance

(C) Break down voltage

(D) Ampacity

 

15-The speed of a DC motor is:

(A) Directly proportional to the back e.m.f. and inversely proportional to the flux

(B) Inversely proportional to back e.m.f. and directly proportional to flux

(C) Directly proportional to the e.m.f. as well as flux

(D) Directly proportional to current

 

16-Least count of steel rule is

(A) 1 mm

(B) 0.5 mm

(C) 1 cm

(D) 0.1 mm

 

17-The sweep of the ceiling fan is determined by:

(A) Length of the blade from fan centre

(B) The diameter of the circle formed by the blade tips of the fan

(C) Breadth of the blades

(D) The distance between adjacent blade tips

 

18-Insulation resistance is measured in

(A) Mega watts

(B) Kilo ohms

(C) Mega ohms

(D) Kilo volts

 

19-Which of the following fire extinguisher is suitable for electrical fire?

(A) Halon

(B) Water

(C) Foam

(D) Liquefied chemical

 

20-What type of motor is used in a food mixer?

(A) DC shunt motor

(B) Universal motor

(C) Capacitor start motor

(D) Permanent capacitor

 

ANSWERS:

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