7000+ Engineering Thermodynamics Questions and Answers Pdf - 1

Question: 1

In a reversible polytropic process

(A) Internal energy remains constant

(B) Enthalpy remains constant

(C) The entropy remains constant

(D) Some heat transfer occurs

Question: 2

Planck's law of radiation is applicable to

(A) Thermal radiation

(B) Monochromatic radiation

(C) Temperature radiation

(D) Radiation of any kind

Question: 3

Heating wet steam at constant temperature is same as heating at

(A) Constant entropy

(B) Constant enthalpy

(C) Constant volume

(D) Constant pressure

Question: 4

In the regenerative cycle

(A) Part of the steam is withdrawn from the turbine and is used in eating the feed water

(B) Part of the steam is withdrawn from the turbine and is used in heating the steam being supplied to the turbine

(C) Power is generated in two stages

(D) Steam is reheated after expansion and again used

Question: 5

According to Charle's law

(A) At constant volume, the absolute pressure is proportional to absolute temperature

(B) At constant gauge pressure, the molecular volume of a gas is proportional to its absolute temperature

(C) At constant pressure, the volume of a gas is proportional to its absolute temperature

(D) At constant pressure, the volume of a gas is proportional to its temperature