161. By decreasing the highest temperature in the Carnot cycle, its efficiency is increased.
TRUE
FALSE
✅ The correct answer is option B.
Thermodynamics MCQs
162. Carnot cycle has maximum efficiency for
petrol engine
diesel engine
reversible engine
irreversible engine
✅ The correct answer is option C.
163. The heating of a gas at constant pressure is governed by
Boyle’s law
Charles’ law
Gay-Lussac law
Avogadro’s law
✅ The correct answer is option B.
164. A molecule consisting of one atom is known as
monoatomic
diatomic
triatomic
polyatomic
✅ The correct answer is option A.
165. Producer gas is obtained by
partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
carbonisation of bituminous coal
passing steam over incandescent coke
passing air and a larg
✅ The correct answer is option A.
166. The principal constituents of a fuel are
carbon and hydrogen
oxygen and hydrogen
sulphur and oxygen
sulphur and hydrogen
✅ The correct answer is option A.
167. Otto cycle is also known as
constant pressure cycle
constant volume cycle
constant temperature cycle
constant temperature a
✅ The correct answer is option B.
168. The hyperbolic pocess is governed by
Boyle’s law
Charles’ law
Gay-Lussac law
Avogadro’s law
✅ The correct answer is option A.
169. Which of the following is an intensive property of a thermodynamic system?
Volume
Temperature
Mass
Energy
✅ The correct answer is option B.
170. When coal is first dried and then crushed to a fine powder by pulverising machine, the resulting fuel is called
wood charcoal
bituminous coal
briquetted coal
none of these
✅ The correct answer is option D.