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ISRO
ISRO Technician-B
Electronic Mechanic
ISRO Technician-B Electronic Mechanic 2017
30

ISRO Technician-B Electronic Mechanic Question Paper - 2017 (Set - 1) with Answer Key

30) An AM receiver is tuned to 855 kHz. If IF is 455 kHz, what is the local oscillator frequency?

400 kHz

1310 kHz

1500 kHz

1520 kHz

Answer is:

1310 kHz

ISRO Technician-B Electronic Mechanic Question Paper - 2017 (Set - 1) with Answer Key

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Related ISRO Technician-B Electronic Mechanic Question Paper - 2017 (Set - 1) with Answer Key

31) In an FET, when drain voltage equals the pinch-off voltage, then drain current _____ with the increase in drain voltage.

decreases

increases

remains constant

none of the above

Answer is:

remains constant

32) HCF of 12, 18 and 24 is

24

12

6

2

Answer is:

6

33) The OP-amp can amplify

a.c. signals only

d.c. signals only

both a.c. and d.c. signals

neither d.c. nor a.c. signals

Answer is:

both a.c. and d.c. signals

34) What is the Q (Quality factor) of a series circuit that resonates at 10 kHz, has equal reactance of 5 kilo-ohms each, and a resistor value of 50 ohms?

400

50

100

150

Answer is:

100

ISRO Technician-B Electronic Mechanic Question Paper - 2017 (Set - 1) with Answer Key

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