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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

A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to_________________?
A 10 kg
B 100 kg
C 1000 kg
D 1 kg
Correct Answer: 10 kg
Principle of similitude forms the basis of_________________?
A comparing two identical equipments
B designing models so that the result can be converted to prototypes
C comparing similarity between design and actual equipment
D hydraulic designs
Correct Answer: designing models so that the result can be converted to prototypes
Cavitation is caused by_____________________?
A high velocity
B high pressure
C weak material
D low pressure
Correct Answer: low pressure
For pipes, turbulent flow occurs when Reynolds number is _____________________?
A less than 2000
B between 2000 and 4000
C more than 4000
D less than 4000
Correct Answer: more than 4000
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than_______________?
A frictional force
B viscosity
C surface friction
D all of the above
Correct Answer: all of the above
A large Roynold number is indication of________________?
A smooth and streamline flow
B laminar flow
C steady flow
D turbulent flow
Correct Answer: turbulent flow
Froude number is significant in__________________?
A supersonics, as with projectile and jet propulsion
B full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
C simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls
D all of the above
Correct Answer: simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls
The equation of continuity holds good when the flow____________________?
A is steady
B is one dimensional
C velocity is uniform at all the cross sections
D all of the above
Correct Answer: all of the above
The total energy of each particle at various places in the case of perfect incompres sible fluid flowing in continuous sream__________________?
A
B keeps on decreasing
C remains constant
D may increase/decrease
Correct Answer: remains constant
Pitot tube is used for measurement of_________________?
A pressure
B flow
C velocity
D dsscharge
Correct Answer: velocity
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