1000+ Process Control Instrumentation MCQ Questions and Answers - 3

Question: 11

Thermistors which have a very high temperature co-efficient of resistivity belong to the class of solid called

(A) conductors

(B) semi conductors

(C) insulators

(D) dielectrics

Question: 12

When a bare thermocouple is covered by a protective sheath, the response because

(A) slower and oscillatory

(B) slower and non oscillatory

(C) faster and oscillatory

(D) faster and non oscillatory

Question: 13

Hot wire anemometer is used for the measurement of

(A) thermal conductivity of gases

(B) very high temperature

(C) flow rates of fluids

(D) flow rates of granular solids

Question: 14

Thermocouple is suitable for measuring

(A) very high temperatures only

(B) liquid temperatures only

(C) very low temperatures only

(D) both high and low temperatures

Question: 15

Which of the following thermocouples has the least temperature measurement range?

(A) iron-constantan

(B) platinum-platinum/rhodium

(C) chromel alumel

(D) copper-constantan