Heat Engine -Multiple Choice Questions Quiz

Interactive MCQs on “Heat Engine”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What is a heat engine?

(a) A device that generates electricity from sunlight
(b) A device that converts heat energy into mechanical work
(c) A device that cools down a room by absorbing heat
(d) A device that stores heat energy for later use

Question 2: What is the main purpose of a heat engine?

(a) To create heat for industrial processes
(b) To generate electrical energy
(c) To provide cooling for electronic devices
(d) To convert mechanical energy into heat

Question 3: What is the efficiency of a heat engine?

(a) The ratio of work output to work input
(b) The ratio of heat output to heat input
(c) The ratio of mechanical energy to electrical energy
(d) The ratio of power output to power input

Question 4: Which law of thermodynamics limits the efficiency of heat engines?

(a) Zeroth law of thermodynamics
(b) First law of thermodynamics
(c) Second law of thermodynamics
(d) Third law of thermodynamics

Question 5: In a heat engine, where does the high-temperature reservoir typically release heat?

(a) To the surroundings
(b) To the low-temperature reservoir
(c) To the electrical generator
(d) To the mechanical system

Question 6: What is the Carnot cycle?

(a) A thermodynamic cycle used in nuclear power plants
(b) A thermodynamic cycle used in heat engines to achieve maximum efficiency
(c) A thermodynamic cycle used in refrigerators and air conditioners
(d) A thermodynamic cycle used in electrical generators

Question 7: In the Carnot cycle, at which stage does the heat engine absorb heat from the high-temperature reservoir?

(a) Isothermal expansion
(b) Adiabatic expansion
(c) Isothermal compression
(d) Adiabatic compression

Question 8: What happens to the entropy of the heat engine during the Carnot cycle?

(a) It increases during the isothermal processes and decreases during the adiabatic processes.
(b) It decreases during the isothermal processes and increases during the adiabatic processes.
(c) It remains constant during all the processes.
(d) It increases during both the isothermal and adiabatic processes.

Question 9: Which type of heat engine is commonly used in modern automobiles?

(a) Carnot engine
(b) Stirling engine
(c) Otto engine (Internal combustion engine)
(d) Steam engine

Question 10: What is the primary source of heat input for most heat engines?

(a) Solar energy
(b) Geothermal energy
(c) Fossil fuels (e.g., gasoline, diesel)
(d) Wind energy