MCQs ESE Electronics & Telecommunication Engineering 

1. Electrical positioning system telemetering uses for transmission of signal in
(a) Two wires only
(b) Two or three wires only
(c) Two or three or four wires only
(d) Two or three or four  or even five wires only 
Answer: (c)
2. The following transducer is used for accurate and precise measurement of temperature
(a) Thermistor
(b) Thermocouple (Alumel/Chromel)
(c) Semiconductor temperature sensor chip
(d) Platinum resistance thermometer 
Answer: (d)
3. A Hall effect transducer is generally used for the measurement of
(a) Power
(b) Current
(c) Displacement
(d) Voltage 
Answer: (c)
4. A digital linear displacement transducer normally uses
(a) Straight binary code
(b) Binary coded decimal
(c) Gray code
(d) Hexadecimal code 
Answer: (c)
5. One of the following can act as an inverse transducer
(a) Electrical resistance potentiometer
(b) LVDT
(c) Piezoelectric crystal
(d) Capacitive transducer 
Answer: (c)
6. Two strain gauges are used to measure strain in a cantilever, one gauge is mounted on the top of the cantilever, and the other is placed at the bottom. Two strain gauges form two arms of Wheatstone’s bridge. This bridge configuration is called
(a) A quarter bridge
(b) A half bridge
(c) A full bridge
(d) A null bridge 
Answer: (b)
7. The value for n for the n-bit A/D convertor required to convert an analog input in the range of 0 to 5 volts to an accuracy of 10mV is
(a) 8
(b) 9
(c) 7
(d) 6 
Answer: (b)
8. For controlling the vibration of the disc of an AC energy meter, damping torque is produced by
(a) Eddy current
(b) Chemical effect
(c) Electrostatic effect
(d) Magnetic effect 
Answer: (a)
9. Analog inputs are converted into digital outputs using op-amps as comparators. Assuming a 5-but digital output, the number of comparators required would be
(a) 32
(b) 31
(c) 64
(d) 63 
Answer: (b)
10. Moving-coil permanent magnet instruments can be used for the measurement of
(a) AC and DC
(b) AC only
(c) DC only
(d) Half-wave rectified DC 
Answer: (c)
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