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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

An open vessel of water is accelerated up an inclined plane. The free water surface will__________________?
A be horizontal
B make an angle in direction of inclination of inclined plane
C make an angle in opposite direction to inclination of inclined plane
D any one of above is possible
Correct Answer: make an angle in opposite direction to inclination of inclined plane
For a floating body to be in equilibrium_____________________?
A meta centre should be above e.g.
B centre of buoyancy and e.g. must lie on same vertical plane
C a righting couple should be formed
D all of the above
Correct Answer: all of the above
Ratio of inertia force to elastic force is known as__________________?
A Mach number
B Froude number
C Reynold’s number
D Weber’s number
Correct Answer: Mach number
Ratio of inertia force to surface Jension is known as ___________________?
A Mach number
B Froude number
C Reynold’s number
D Weber’s number
Correct Answer: Weber’s number
When a body floating in a liquid, is displaced slightly, it oscillates about _________________?
A e.g. of body
B center of pressure
C center of buoyancy
D metacentre
Correct Answer: metacentre
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be_________________?
A 2 meters of water column
B 3 meters of water column
C 5 meters of water column
D 6 meters of water Column
Correct Answer: 6 meters of water Column
A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is____________________?
A 9,000 kg
B 13,500 kg
C 18,000 kg
D 27,000 kg
Correct Answer: 13,500 kg
A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is_________________?
A 1
B 5
C 7
D 6
Correct Answer: 6
The center of pressure of a surface subjected to fluid pressure is the point_______________?
A on the surface at which resultant pres-sure acts
B on the surface at which gravitational force acis
C at which all hydraulic forces meet
D similar to metacentre
Correct Answer: on the surface at which resultant pres-sure acts
Metacentric height is the distance between the metacentre and_______________?
A water surface
B center of pressure
C center of gravity
D center of buoyancy
Correct Answer: center of gravity
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