MCQ on Electronics and Instrumentation
1- What type of generator will be selected to produce a DC power supply with nearly constant voltage from no load to full load?
A:- Shunt generator
B:- Series generator
C:- Differential compound generator
D:- Cumulative compound generator
2- Thyrite-type lighting arrester is used to
A:- absorb the surge voltage
B:- block the surge voltage
C:- bypass surge to the ground
D:- return surge back to the source
3- Light Emitting Diode (LED) is made up of
A:- In P
B:- GaAs
C:- Cd Te
D:- Si
4- Codes used for spreading in the CDMA system is
A:- Orthogonal
B:- Non orthogonal
C:- Cyclic
D:- Huffman
5- Which wireless mobile technology is used for image transmission?
A:- 1G
B:- 2G
C:- 3G
D:- None of these
6- Which type of radiation is typically used in the radiation absorption method for level measurement?
A:- Alpha particles
B:- Beta particles
C:- Gamma rays
D:- X-rays
7- Ultrasonic level gauges operate based on the principle of
A:- Refraction
B:- Reflection
C:- Diffraction
D:- Transmission
8- The working principle of a Pirani gauge is based on
A:- Thermal conductivity
B:- Piezoelectric effect
C:- Magnetic induction
D:- Ionization of gas molecules
9- The Bourdon-type pressure gauge operates based on the principle of
A:- Thermal expansion
B:- Capacitance sensing
C:- Elastic deformation
D:- Magnetic induction
10- A McLeod gauge is commonly used to measure
A:- Temperature
B:- Pressure
C:- Flow rate
D:- Humidity
11- Which of the following is not the governing principle of variable inductance transducers?
A:- Change of self-inductance
B:- Change of mutual inductance
C:- Production of eddy currents
D:- Change of differential inductance
ANSWERS:
1-(D), 2-(C), 3-(B), 4-(A), 5-(C), 6-(C), 7-(B), 8-(A), 9-(C), 10-(B), 11-(D)