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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

All Topics  1919

An open system is one in which____________________?
A mass does not cross boundaries of the system, though energy may do so
B neither mass nor energy crosses the boundaries of the system
C both energy and mass cross the boundaries of the system
D mass crosses the boundary but not the energy
Correct Answer: both energy and mass cross the boundaries of the system
Gases have___________________?
A only one value of specific heat
B two values of specific heat
C three values of specific heat
D no value of specific heat
Correct Answer: two values of specific heat
Extensive property of a system is one whose value______________________?
A depends on the mass of the system like volume
B does not depend on the mass of the system, like temperature, pressure, etc.
C is not dependent on the path followed but on the state
D is dependent on the path followed and not on the state
Correct Answer: depends on the mass of the system like volume
The statement that molecular weights of all gases occupy the same volume is known as________________?
A Avogadro’s hypothesis
B Dalton’s law
C Gas law
D Law of thermodynamics
Correct Answer: Avogadro’s hypothesis
If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to__________________?
A + v
B – ve
C zero
D pressure x volume
Correct Answer: zero
Properties of substances like pressure, temperature and density, in thermodynamic coordinates are__________________?
A path functions
B point functions
C cyclic functions
D real functions
Correct Answer: point functions
Which of the following is not the intensive property___________________?
A pressure
B temperature
C density
D heat
Correct Answer: heat
Work done in an adiabatic process between a given pair of end states depends on__________________?
A the end states only
B particular adiabatic process
C the value of index n
D the value of heattransferred
Correct Answer: the end states only
Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure___________________?
A enthalpy
B volume
C mass
D entropy
Correct Answer: volume
Solids and liquids have___________________?
A one value of specific heat (ft) two values of specific heat
B
C three values of specific heat
D no value of specific heat
Correct Answer: one value of specific heat (ft) two values of specific heat
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