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MGVCL Exam Paper (30-07-2021 Shift 3)

MGVCL Exam Paper (30-07-2021 Shift 3)
Transistors were used in

Fourth Generation Computers
Second Generation Computers
First Generation Computers
Third Generation Computers

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MGVCL Exam Paper (30-07-2021 Shift 3)
Thermopile is used for the measurement of

emf
current
flow rate
temperature

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The function of a thermopile is to transfer the heat radiation emitted from the object to a voltage output.
The output is in the range of tens or hundreds of millivolts.
Thermopiles are used to provide an output in response to temperature as part of a temperature measuring device

MGVCL Exam Paper (30-07-2021 Shift 3)
Rearrange the following to form a meaningful sentence and find the most logical order from the given options.
P: globally, out of which over 200 million
Q: are now in India, and
R: flipkart has 700 million users
S: growing exponentially

PQRS
RPQS
RSQP
RPSQ

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MGVCL Exam Paper (30-07-2021 Shift 3)
Which of the following medium is used between CPU and RAM to speed up the processing power of a CPU?

Cache memory
Virtual memory
Flash memory
DRAM

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MGVCL Exam Paper (30-07-2021 Shift 3)
The maximum value of power factor is ____ and it exists in a pure____ circuit.

0.866, inductive
1, resistive
0.866, resistive
1, inductive

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Value of power factor is varies from 0 to 1.
R→PF = 1
L→PF = 0 lag
C→PF = 0 lead
R-L→0 lag < PF < 1
R-C→0 lead < PF < 1
R-C-L→depends on value of R, L and C. PF = R/Z

MGVCL Exam Paper (30-07-2021 Shift 3)
A three phase four pole 50 Hz induction motor has a rotor resistance of 0.02 Ω/phase and stand-still reactance of 0.5 Ω/phase. Calculate the speed at which the maximum torque is developed.

1500 rpm
1525 rpm
1475 rpm
1440 rpm

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Condition for maximum torque,
Sm = R2/X2
= 0.04
Ns = (120*f)/P
= (120*50)/4
= 1500 rpm
S = (Ns - Nr)/Ns
Nr = Ns(1 - Sm)
= 1500*(1 - 0.04)
= 1440 rpm

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