HindustanAeronauticsLtd. Question-Paper Contributed by Emmanuel updated on Aug 2020
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HAL Sample Test Paper

1. When length of a wire increases its resistance
a. doubles 
b. half 
c. remains same
Ans: ( a )

2. When a 50 Hz ,6-pole Induction Motor runs at 975rpm,the rotor emf frequency is
a. 12.5Hz 
b. 1.25Hz 
c. 4Hz
Ans: ( b )

3. When a 6 pole 50Hz Induction Motor runs at 1450 rpm , it’s working mode is
a. motoring 
b. braking 
c. generating

Ans: ( a )

4. Slips for Different modes of operation of Induction Motor are
answer: motoring -0

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