1. For the protection of stator winding of an alternator against internal fault involving ground, the relay used is a
Answer : biased directional relay
Explanation:-
2. The 8051 can handle_______interrupt sources
Answer : 5
Explanation:-
3. The TRAIC is equivalent to
Answer : Two SCRs connected in antiparallel
Explanation:-
4. The speed-time curve for urban service has no_____
Answer : free running period
Explanation:-
5. An ideal amplifier has
Answer : responds only to signals at its input terminals
Explanation:-
6. The inductance of a transmission line is minimum when________________
Answer : GMD is low and GMR is high
Explanation:- GMD=Geometrical Mean Distance , GMR=Geometrical Mean Radius
7. A three phase 6-pole,50HZ induction motor is running at 5% slip. What is the speed of the motor
Answer : 950 rpm
Explanation:- Given Poles=6, frequency=50Hz, slip=5%
Ns=120f/P=(120*50)/6=1000rpm
Slip=(Ns-N)/Ns
5%=(1000-N)/1000
0.05=(1000-N)/1000
1000-N=50
N=1000-50=950 rpm
8. The internal RAM memory of the 8051 is
Answer : 128 bytes
Explanation:-
9. The sag of a transmission line is least affected owing to
Answer : Current through the conductor
Explanation:-
10. The binary equivalent of hexadecimal number 4F2D is______
Answer : 0100 1111 0010 1101
Explanation:-
Given Hexadecimal Number=4F2D
for conversion into binary we represent the Each Hexadecimal digit into 4digit BCD
4 F 2 D
0100 1111 0010 1101
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