VSSC Electrician Previous Paper | Vikram Sarabhai Space Centre Electrician Paper 2017
VSSC Technician Exam 2023 will be conducted on 20th Aug 2023 for the post Electrician. If you are the aspirants of the said exam, then you must read this question paper for your practice.
PIV of a diode indicates
(a) Peak instantaneous voltage
(b) Peak inverse voltage
(c) Peak inverse value
(d) PIV do not apply to diodes
Which is the configuration of opto-coupler and its typical use?
(a) LED and a phto diode, used for isolation
(b) LED and a signal diode, used for signal clamping
(c) Transistor and LED, used for voltage amplification
(d) Photo diode and Transistor, used for attenuation
hfe of a transistor increases if
(a) Base width is increased
(b) Doping of base is reduced
(c) Power rating of the transistor is increased
(d) Metal can packaging is used
XOR gate
(a) Can be used to know whether two digital inputs are indentical
(b) Is a NOT followed by OR
(c) Two OR gates followed by AND
(d) Cannot be used for matching of two inputs
The following Hexadecimal operation yields : 0xF0-0xAA+0x10_______
(a) 0xA5
(b) 0x56
(c) 0x74
(d) 0x66
A binary counter to count upto 100 (decimal) needs at least
(a) 7 flipflops
(b) 6 flipflops and one OR gate
(c) 5 flipflops and two AND gates
(d) 50 flipflops
What is the resistance during heating of the thermostat in a water heater?
(a) Around 1 kilo Ohms
(b) Close to zero Ohms
(c) Very high value upto 100 Ohms
(d) Open
The capacitor in an electric fan is connected as
(a) Series to start winding
(b) Series to main winding
(c) Parallel to main winding
(d) Parallel to start winding
Which pump does not need priming?
(a) Reciprocating Pump
(b) Jet pump
(c) Submersible Pump
(d) Centrifugal Pump
AC voltage of the order of 110 kV is typically used for long distance transmission mainly because
(a) Thinner conductors are only required
(b) Chance of Corona is less
(c) Generators produce 110 KV AC
(d) Some customers may need 110 KV AC supply
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