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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

During the opening of a valve in a pipe line, the flow is_________________?
A steady
B unsteady
C uniform
D laminar
Correct Answer: steady
The flow which neglects changes in a transverse direction is known as_________________?
A one dimensional flow
B uniform flow
C steady flow
D turbulent flow
Correct Answer: one dimensional flow
The flow in which conditions do not change with time at any point, is known as_________________?
A one dimensional flow
B uniform flow
C steady flow
D turbulent flow
Correct Answer: steady flow
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as__________________?
A one dimensional flow
B uniform flow
C steady flow
D turbulent flow
Correct Answer: turbulent flow
Two dimensional flow occurs when________________?
A the direction and magnitude of the velocity at all points are identical
B the velocity of successive fluid particles, at any point, is the same at successive periods of time
C the magnitude and direction of the velocity do not change from point to point in the fluid
D the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
Correct Answer: the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is _________________?
A 0.83
B 0.6
C 0.4
D 0.3
Correct Answer: 0.6
In a free vortex motion, the radial component of velocity everywhere is________________?
A maximum
B minimum
C zero
D non-zero and finite
Correct Answer: zero
The region between the separation streamline and the boundary surface of the solid body is known as__________________?
A wake
B drag
C lift
D boundary layer
Correct Answer: wake
The upper surface of a weir over which water flows is known is_____________________?
A crest
B nappe
C sill
D weir top
Correct Answer: sill
Uniform flow occurs when_____________________?
A the direction and magnitude of the velocity at all points are identical
B the velocity of successive fluid paiticles, at any point, is the same at successive periods of time
C the magnitude and direction of the velocity do not change from point to point in the fluid
D the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each pleasure
Correct Answer: the magnitude and direction of the velocity do not change from point to point in the fluid
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