7000+ Mechanical Engineering Viva Questions and Answers Pdf - 1

Question: 1

In which does the thermal conductivity increase from left to right?

(A) Aluminium, silver, copper

(B) Aluminium, copper, silver

(C) Copper, silver, aluminium

(D) Silver, copper, aluminium

Question: 2

Thermal diffusivity of a substance is

(A) Directly proportional to thermal conductivity

(B) Inversely proportional to thermal conductivity

(C) Directly proportional to the square of thermal conductivity

(D) Inversely proportional to the square of thermal conductivity

Question: 3

Which of the following has higher thermal conductivity as compared to the remaining?

(A) Air

(B) Hydrogen

(C) Water

(D) Oxygen

Question: 4

Which of the following has the highest value of the thermal conductivity

(A) Asbestos

(B) Refractory brick

(C) Asbestos

(D) Wood

Question: 5

In which one of the following materials, is the heat energy propagation minimum due to conduction heat transfer?

(A) Air

(B) Lead

(C) Copper

(D) Water