OPSC Assistant Executive Engineer Mechanical Paper 2020

Odisha PSC Assistant Executive Engineer Mechanical Paper 2020

Which one of the following relations defines Helmholtz function?
(a) H+TS
(b) H-TS
(c) U+TS
(d) U-TS

For an ideal gas the copressibility factor is
(a) Zero
(b) Unity
(c) Infinity
(d) None of these

Which one of the following is the extensive property of the sytem?
(a) Volume
(b) Pressure
(c) Temperature
(d) Density

An ideal gas of mass ‘m’ amd temperature T1 undergoes a reversible isothermal process from an initial pressure P1 to final pressure P2. The heat loss during the process is Q. The entropy change of the gas is
(a) mRin(P2/P1)
(b) mRin(P1/P2)
(c) mRT
(d) Zero

Heat and work are
(a) Path function
(b) Intensive properties
(c) Point function
(d) None of these

If a closed system is undergoing an irrversible process, the entropy of the system
(a) Must decreases
(b) Zero
(c) Must increase
(d) Remain constant

A positive value of Joule-Thomson coefficient of a liquid means
(a) Temperature drops during throttling
(b) Temperature remains constant
(c) Temperature rises during throttling
(d) None of these

For a non-flow constant pressure process the heat exchange is equal to
(a) Zero
(b) The work done
(c) The change in internal energy
(d) The change in enthalpy

What is the rise in temperature of 80 litres of water in 40 min by a heater of 2kW, if whole of the heater energy used to raise the water temperature?
(a) 14.3 degree Celcius
(b) 1.43 degree Celcius
(c) 2.52 degree Celcius
(d) 25.2 degree Celcius

Water vapour can be considered as Ideal Gas
(a) Never
(b) Always
(c) At high pressure
(d) At low pressure

In van der Waals equation of state the two constant are determined from the vehaviour of substance at
(a) Saturated point
(b) Triple point
(c) Critical point
(d) Never determined

Pressure exerted by a gas in a closed container is
(a) Weak function of Density and Temperature
(b) Weak function of Density and Volume
(c) Strong function of Density and Temperature
(d) Strong function of Density and Volume

you will also refer to other state or competitive exam Mechanical Engineering paper for Practice. The links are given below –

Mechanical Engineering Practice papers –
Paper – 1
Paper – 2
Paper – 3

Last Updated on – 16th July 2022