151. The absolute pressure of a given mass of a perfect gas varies inversely as its volume, when the temperature remains constant. This statement is known as Boyle’s law.
Yes
No
✅ The correct answer is option A.
Thermodynamics MCQs
152. The fuel mostly used in blast furnace for extracting pig iron from iron ores is
hard coke
soft coke
pulverised coal
bituminous coal
✅ The correct answer is option A.
153. The efficiency of the dual combustion cycle for the same compression ratio, is __________ Diesel cycle.
greater than
less than
equal to
✅ The correct answer is option A.
155. The variables which control the physical properties of a perfect gas are
pressure exerted by the gas
volume occupied by the gas
temperature of the gas
all of these
✅ The correct answer is option D.
156. Both the Ericsson and Joule’s cycle have two constant pressure processes.
TRUE
FALSE
✅ The correct answer is option A.
157. The universal gas constant (or molar constant) of a gas is the product of
molecular mass of the gas and the gas constant
atomic mass of the gas and the gas constant
molecular mass of the gas and the specific heat at constant pressure
molecular mass of the
✅ The correct answer is option A.
159. When the expansion or compression takes place according to the law pvn = C, the process is known as
isothermal process
adiabatic process
hyperbolic process
polytropic process
✅ The correct answer is option D.
160. Kerosene is distilled at
65° to 220°C
220° to 345°C
345° to 470°C
470° to 550°C
✅ The correct answer is option B.