Question48:-Melting point of copper is
A:-1083°C
B:-660° C
C:-2200° C
D:-490° C
Correct Answer:- Option-A
Question49:-Efficiency of full wave rectifier is about
A:-40.80 %
B:-82.10 %
C:-81.20 %
D:-83.10 %
Correct Answer:- Option-C
Question50:-The maximum safe temperature can with stand class H insulating material is
A:-200° C
B:-180° C
C:-155° C
D:-120° C
Correct Answer:- Option-B
Question51:-Pitch factor of a winding is the ratio of
A:-No of slote/pole pitch
B:-Winding pitch/pole pitch
C:-Pole pitch/winding pitch
D:-None of the above
Correct Answer:- Option-B
Question52:-The type of motor used in vacuum cleaneris
A:-Capacitor start induction run motor
B:-Capacitor start capacitor run motor
C:-Induction run motor
D:-Universal motor
Correct Answer:- Option-D
Question53:-Fluorescent lamp is a
A:-High pressure sodium vapour lamp
B:-Low pressure mercury vapour lamp
C:-Arc lamp
D:-High pressure mercury vapour lamp
Correct Answer:- Option-B
Question54:-G series MCB's are used for protecting
A:-Inductive load
B:-Resistive load
C:-Capacitive load
D:-All of the above
Correct Answer:- Option-A
Question55:-Nickel iron cell is also known as
A:-Primary cell
B:-Junger cell
C:-Voltaic cell
D:-Edison cell
Correct Answer:- Option-D
Question56:-Nickel Iron cell are widly used in Aircraft engineering because of its
A:-Heavy rate discharging capacity
h voltage
C:-High efficiency
D:-Good mechanical strength
Correct Answer:- Option-D
Question57:-Widly used semiconducting material is
A:-Carbon
B:-Germanium