Engineering Thermodynamics mcq Questions And Answers – Set 16

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All questions answers in the last paragraph

Q1. The efficiency of Joule cycle is

(A) Greater than Carnot cycle
(B) Less than Carnot cycle
(C) Equal to Carnot cycle
(D) None of these

Q2. Otto cycle is also known as

(A) Constant pressure cycle
(B) Constant volume cycle
(C) Constant temperature cycle
(D) Constant temperature and pressure cycle

Q3. When the expansion or compression takes place according to the law pvn = C, the process is known as

(A) Isothermal process
(B) Adiabatic process
(C) Hyperbolic process
(D) Polytropic process

Q4. Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as

(A) Zeroth law of thermodynamics
(B) First law of thermodynamics
(C) Second law of thermodynamics
(D) Kinetic theory of gases

Q5. According to Avogadro’s law

(A) The product of the gas constant and the molecular mass of an ideal gas is constant
(B) The sum of partial pressure of the mixture of two gases is sum of the two
(C) Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
(D) All of the above

Q6. Which of the following statement is incorrect?

(A) The liquid fuels consist of hydrocarbons
(B) The liquid fuels have higher calorific value than solid fuels
(C) The solid fuels have higher calorific value than liquid fuels
(D) A good fuel should have low ignition point

Q7. The heat and mechanical energies are mutually convertible. This statement was established by

(A) Boyle
(B) Charles
(C) Joule
(D) None of these

Q8. The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to

(A) 0
(B) 1
(C) γ
(D) ∝

Q9. When the gas is heated at constant pressure, the heat supplied

(A) Increases the internal energy of the gas
(B) Increases the temperature of the gas
(C) Does some external work during expansion
(D) Both (B) and (C)

Q10. Which is the incorrect statement about Carnot cycle?

(A) It is used as the alternate standard of comparison of all heat engines.
(B) All the heat engines are based on Carnot cycle.
(C) It provides concept of maximizing work output between the two temperature limits.
(D) All of the above

Q11. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as

(A) Carnot cycle
(B) Stirling cycle
(C) Otto cycle
(D) Diesel cycle

Q12. The heat and work are mutually convertible. This statement is called __ law of thermodynamics.

(A) Zeroth
(B) First
(C) Second
(D) Third

Q13. One kilowatt is equal to

(A) 1 N-m/s
(B) 100 N-m
(C) 1000 N-m/s
(D) 1 × 106 N-m/s

Q14. When a gas is heated at constant volume

(A) Its temperature will increase
(B) Its pressure will increase
(C) Both temperature and pressure will increase
(D) Neither temperature nor pressure will increase

Q15. The measurement of a thermodynamic property known as temperature is based on

(A) Zeroth law of thermodynamics
(B) First law of thermodynamics
(C) Second law of thermodynamics
(D) None of these

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