# Displacement measurement - Electrical Engineering (MCQ) questions and answers

1)   The detectors used in optical sensors is

a. Photodiodes
b. Phototransistors
c. Laser
d. Only (a) and (b)
e. All the above
 Answer  Explanation ANSWER: Only (a) and (b) Explanation: No explanation is available for this question!

2)   Optical sensors used for the displacement measurement works on the principal that

a. Intensity of light increases with distance
b. Intensity of light decreases with distance
c. Intensity of light remains constant with distance
d. Intensity of light increases with time
 Answer  Explanation ANSWER: Intensity of light decreases with distance Explanation: No explanation is available for this question!

3)   Capacitance sensor can measure very small displacement. It can be formed by varying

a. Separation
b. Area
c. Permittivity
d. Either (a) or (b) or (c)
 Answer  Explanation ANSWER: Either (a) or (b) or (c) Explanation: No explanation is available for this question!

4)   Resolver works on the principal of mutual inductance variation. It is mainly used for the measurement of

a. Linear displacement
b. Non - linear displacement
c. Rotary motion
d. All of these
 Answer  Explanation ANSWER: Rotary motion Explanation: No explanation is available for this question!

5)   In rotary variable differential transformer, the mutual inductance between the primary and secondary coils varies

a. Linearly with the angular displacement
b. Non - linearly with the angular displacement
c. Linearly with the linear displacement
d. Non - linearly with the linear displacement
 Answer  Explanation ANSWER: Linearly with the angular displacement Explanation: No explanation is available for this question!

6)   LVDT which is an instrument for the measurement of displacement, works on the principal of

a. Linear inductance
b. Non - linear inductance
c. Mutual inductance
d. Linear capacitance
 Answer  Explanation ANSWER: Mutual inductance Explanation: No explanation is available for this question!

7)   Potentiometer is used for the measurement of

a. Linear displacement
b. Angular displacement
c. Non - linear displacement
d. Only (1) and (2)
e. All the above
 Answer  Explanation ANSWER: Only (1) and (2) Explanation: No explanation is available for this question!

8)   The displacement measuring instruments is / are

a. Potentiometer
b. LVDT
c. RVDT
d. All of these
 Answer  Explanation ANSWER: All of these Explanation: No explanation is available for this question!