Measurements and Instrumentation

11

Which of the following combinations is not used in thermocouple transducer measurement of temperature?

A. Iron-constantan
B. Chromel-aluminium
C. Copper-constantan
D. Iron-silver

12

The scale of thermocouple instrument is linear.

A. True
B. False

13

Harmonic distortion analyser

A. measures amplitude of each harmonic
B. measures rms value of fundamental frequency component
C. measures rms value of all harmonics except fundamental frequency
D. displays rms value of each harmonic on screen of CRO

14

Which of the following, is not a piezoelectric material?

A. Rochelle salt
B. Quartz
C. Lithium sulphate
D. Sodium bicarbonate

15

Assertion (A): An RTD uses platinum coil.

Reason (R): Platinum is a very stable material.

A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true R is false
D. A is false R is true