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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

Piezometer is used to measure_____________________?
A pressure in pipe, channels etc.
B atmospheric pressure
C very low pressures
D difference of pressure between two points
Correct Answer: very low pressures
Euler’s dimensionless number relates the following__________________?
A inertial force and gravity
B viscous force and inertial force
C viscous force and buoyancy force
D pressure force and inertial force
Correct Answer: pressure force and inertial force
Which of the following manometer has highest sensitivity_________________?
A U-tube with water
B inclined U-tube
C U-tube with mercury
D micro-manometer with water
Correct Answer: micro-manometer with water
Working principle of dead weight pressure gauge tester is based on_______________?
A Pascal’s law
B Dalton’s law of partial pressure
C Newton’s law of viscosity .
D Avogadro’s hypothesis
Correct Answer: Pascal’s law
Center of pressure compared to e.g. is___________________?
A above it
B below it
C at same point
D above or below depending on area of body
Correct Answer: below it
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called_______________?
A upthrust
B reaction
C buoyancy
D metacentre
Correct Answer: buoyancy
A body floats in stable equilibrium ____________________?
A when its meatcentric height is zero
B when the metancentre is above e.g.
C when its e.g. is below it’s center of buoyancy
D metacentre has nothing to do with position of e.g. for determining stability
Correct Answer: when the metancentre is above e.g.
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if___________________?
A the area is horizontal
B the area is vertical
C the area is inclined
D all of the above
Correct Answer: all of the above
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is____________________?
A 2.4 m
B 3.0 m
C 4.0 m
D ”2.5 m
Correct Answer: 3.0 m
For a body floating in a liquid the normal pressure exerted by the liquid acts at ____________________?
A bottom surface of the body
B e.g. of the body
C metacentre
D all points on the surface of the body
Correct Answer: all points on the surface of the body
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