Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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.

Flow occurring in a pipeline when a valve is being opened is________________?

A steady

B unsteady

C laminar

D vortex

Review Detailed Answer

Correct Answer: steady

The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as________________?

A one dimensional flow

B uniform flow

C steady flow

D turbulent flow

Review Detailed Answer

Correct Answer: uniform flow

Steady 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

Review Detailed Answer

Correct Answer: the velocity of successive fluid particles, at any point, is the same at successive periods of time

Uniform flow occurs when ___________________?

A the flow is steady

B the flow is streamline

C size and shape of the cross section in a particular length remain constant

D size and cross section change uniformly along length

Review Detailed Answer

Correct Answer: size and shape of the cross section in a particular length remain constant

An ideal flow of any fluid must satisfy __________________?

A Pascal law

B Newton’s law of viscosity

C boundary layer theory

D continuity equation

Review Detailed Answer

Correct Answer: continuity equation

Flow of water in a pipe about 3 metres in diameter can be measured by__________________?

A orifice plate

B venturi

C rotameter

D pitot tube

Review Detailed Answer

Correct Answer: pitot tube

The normal stress is same in all directions at a point in a fluid_______________?

A only when the fluid is frictionless

B only when the fluid is incompressible and has zero viscosity

C when there is no motion of one fluid layer relative to an adjacent layer

D irrespective of the motion of one fluid layer relative to an adjacent layer

Review Detailed Answer

Correct Answer: when there is no motion of one fluid layer relative to an adjacent layer

The time oscillation of a floating body with increase in metacentric height will be_________________?

A same

B higher

C lower

D lower/higher depending on weight of body

Review Detailed Answer

Correct Answer: lower

Differential monometer is used to measure___________________?

A pressure in pipes, channels etc.

B atmospheric pressure

C very low pressure

D difference of pressure between two points

Review Detailed Answer

Correct Answer: difference of pressure between two points

Resultant pressure of the liquid in the case of an immersed body acts through____________________?

A centre of gravity

B centre of pressure

C metacentre

D centre of buoyancy

Review Detailed Answer

Correct Answer: centre of pressure

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Flow occurring in a pipeline when a valve is being opened is________________?

The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as________________?

Steady flow occurs when___________________?

Uniform flow occurs when ___________________?

An ideal flow of any fluid must satisfy __________________?

Flow of water in a pipe about 3 metres in diameter can be measured by__________________?

The normal stress is same in all directions at a point in a fluid_______________?

The time oscillation of a floating body with increase in metacentric height will be_________________?

Differential monometer is used to measure___________________?

Resultant pressure of the liquid in the case of an immersed body acts through____________________?