Thermal Engineering MCQ Questions with answers and solutions Page 3

Q. Heating wet steam at constant temperature is heating it at constant

(A) volume
(B) pressure
(C) entropy
(D) enthalpy

💬 Discuss

✅ Correct Answer: (B) pressure

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Q. The state of vapour under saturation condition is described by

(A) pressure alone
(B) temperature alone
(C) pressure and temperature
(D) pressure and dryness fraction

💬 Discuss

✅ Correct Answer: (D) pressure and dryness fraction

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Q. The increase in pressure

(A) lowers the boiling point of a liquid
(B) raises the boiling point of a liquid
(C) .does not affect the boiling point of a liquid
(D) reduces its volume

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✅ Correct Answer: (B) raises the boiling point of a liquid

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Q. What is a pure substance?

(A) homogeneous mixture of two substances of same composition
(B) a substance with constant chemical composition throughout its mass
(C) both a. and b.
(D) none of the above

💬 Discuss

✅ Correct Answer: (B) a substance with constant chemical composition throughout its mass

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Q. A pure substance exists in

(A) solid phase
(B) liquid phase
(C) gaseous phase
(D) all of the above

💬 Discuss

✅ Correct Answer: (D) all of the above

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Q. Total heat of a substance is also known as

(A) internal energy
(B) entropy
(C) thermal capacity
(D) enthalpy

💬 Discuss

✅ Correct Answer: (D) enthalpy

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Q. Equivalent evaporation of water is the evaporation "for a feed water supply at 100°C

(A) and its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm2
(B) and its corresponding conversion into dry steam at desired boiler pressure
(C) conversion into steam at atmospheric condition
(D) conversion into steam at the same pres-sure at which feed water is supplied

💬 Discuss

✅ Correct Answer: (A) and its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm2

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Q. Cochran boiler is a

(A) horizontal fire-tube boiler
(B) horizontal water-tube boiler
(C) veritcal water-tube boiler
(D) vertical fire tube boiler

💬 Discuss

✅ Correct Answer: (D) vertical fire tube boiler

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Q. Lancashire 'boiler is a

(A) stationary fire tube boiler
(B) stationary water tube boiler
(C) water tube boiler with natural/forced circulation
(D) mobile fire tube boiler

💬 Discuss

✅ Correct Answer: (A) stationary fire tube boiler

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Q. The diameter of Cornish boiler is of the order of

(A) 1-2 m
(B) 1.5-2.5 m
(C) 2-3 m
(D) 2.5-3.5 m

💬 Discuss

✅ Correct Answer: (A) 1-2 m

Published by Mr. Dubey ⭐ 111.54K Points at 14-Jun-2020 11:59 am in Thermal Engineering

Thermal Engineering MCQs | Page - 3

Q. Heating wet steam at constant temperature is heating it at constant

Q. The state of vapour under saturation condition is described by

Q. The increase in pressure

Q. What is a pure substance?

Q. A pure substance exists in

Q. Total heat of a substance is also known as

Q. Equivalent evaporation of water is the evaporation "for a feed water supply at 100°C

Q. Cochran boiler is a

Q. Lancashire 'boiler is a

Q. The diameter of Cornish boiler is of the order of

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