UPRVNL Questions

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Q1:- For constant power o/p the current drawn by a synchronous motor will be minimum when the p.f. is

1. lagging
2. zero
3. unity
4. leading

ANSWER:-3

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Q2:- Final value theorem is used to determine

1. steady state value of the system o/p
2. initial value and transient behaviour both
3. initial value of the system o/p
4. none of the above

ANSWER:-1

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Q3:- The convolution of a finite sequence with an infinite sequence 

1. may be a finite or finite sequence 
2. is always an infinite sequence
3. cannot be found
4. is always a finite sequence

ANSWER:-2

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Q4:- The band width of signal x(t) is 10 kHz then the band width of signal x(2t) will be 

1. 2 kHz
2. 5 kHz
3. 20 kHz
4. 10 kHz

ANSWER:-3

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Q5:- In respect of class D type chopper which of the following statement is correct

1. the load voltage is always positive and load current may either positive or negative
2. the load voltage is always positive and load voltage may either positive or negative
3. the load current is always negative and load voltage is always positive
4. none of these

ANSWER:-2

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