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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

For very great pressures, viscosity of moss gases and liquids__________________?
A remains same
B increases
C decreases
D shows erratic behavior
Correct Answer: shows erratic behavior
Viscosity of water in comparison to mercury is_________________?
A higher
B lower
C same
D higher/lower depending on temperature
Correct Answer: higher
The bulk modulus of elasticity___________________?
A has the dimensions of 1/pressure
B increases with pressure
C is large when fluid is more compressible
D is independent of pressure and viscosity
Correct Answer: increases with pressure
Units of surface tension are____________________?
A energy/unit area
B distance
C both of the above
D it has no units
Correct Answer: both of the above
For manometer, a better liquid combination is one having ___________________?
A higher surface tension
B lower surface tension
C surface tension is no criterion
D high density and viscosity
Correct Answer: higher surface tension
Alcohol is used in manometer, because____________________?
A its vapour pressure is low
B it provides suitable meniscus for the inclined tube
C its density is less
D it provides longer length for a given pressure difference
Correct Answer: its vapour pressure is low
The property of fluid by virtue of which it offers resistance to shear is called________________?
A surface tension
B adhesion
C cohesion
D viscosity
Correct Answer: viscosity
The density of water is 1000 kg/m3 at__________________?
A 0°C
B 0°K
C 4°C D. 20°C
D
Correct Answer: 0°C
The ratio of absolute viscosity to mass density is known as_________________?
A specific viscosity
B viscosity index
C kinematic viscosity
D coefficient of viscosity
Correct Answer: kinematic viscosity
Alcohol is used in manometers because___________________?
A it has low vapour pressure
B it is clearly visible
C it has low surface tension
D it can provide longer column due to low density
Correct Answer: it can provide longer column due to low density
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