RRB JE 2015 Question Paper (16-Sep-2015) Shift 3

Question 1

For a simple closed system of constant composition, the difference between the heat and work interactions is identifiable as change in

Accepted Answer

Internal energy

Answer

Enthalpy

Answer

Entropy

Answer

Flow energy

Question 2

This process is one in which there is only work interaction between the system and the surroundings

Accepted Answer

Adiabatic process

Answer

Diabatic process

Answer

Isothermal process

Answer

Quasi-static process

Question 3

Isentropic flow is

Accepted Answer

Reversible adiabatic flow

Answer

Irreversible adiabatic flow

Answer

Ideal fluid flow

Answer

Frictionless reversible flow

Question 4

Fins are made as thin as possible to

Accepted Answer

Accommodate more number of fins

Answer

Reduce the total weight

Answer

Increase the width for the same profile area

Answer

Improve flow of coolant around the fin

Question 5

Fraction of radiative energy leaving one surface that strikes the other surface is called

Accepted Answer

View factor

Answer

Radiative flux

Answer

Emissive power of the first surface

Answer

Re-radiation flux