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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

Buoyant force is___________________?
A resultant force acting on a floating body
B equal to the volume of liquid displaced
C force necessary to keep a body in equilibrium
D the resultant force on a body due to the fluid surrounding it
Correct Answer: the resultant force on a body due to the fluid surrounding it
Metacentre is the point of intersection of _________________________?
A vertical upward force through e.g. of body and center line of body
B buoyant force and the center line of body
C mid point between e.g. and center of buoyancy
D all of the above
Correct Answer: buoyant force and the center line of body
Center of buoyancy is the___________________?
A centroid of the displaced volume of fluid
B center of pressure of displaced volume
C e.g. of floating ‘body
D does not exist
Correct Answer: centroid of the displaced volume of fluid
Barometer is used to measure__________________?
A pressure in pipes, channels etc.
B atmospheric pressure
C very low pressure
D difference of pressure between two points
Correct Answer: atmospheric pressure
Poise is the unit of________________?
A surface tension
B capillarity
C viscosity
D shear stress in fluids
Correct Answer: viscosity
Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called________________?
A adhesion
B cohesion
C viscosity
D compressibility
Correct Answer: adhesion
Which of the following is the unit of kinematic viscosity _________________?
A pascal
B poise
C stoke
D faraday
Correct Answer: stoke
Hot wire anemometer is used to measure_______________?
A discharge
B velocity of gas
C pressure intensity of gas
D pressure intensity of liquid
Correct Answer: velocity of gas
Choose the wrong statement?
A The horizontal component of the hydro-static force on any surface is equal to the normal force on the vertical projection of the surface
B The horizontal component acts through the center of pressure for the vertical projection
C The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area
D he vertical component passes through the center of pressure of the volume
Correct Answer: he vertical component passes through the center of pressure of the volume
Choose the wrong statement ?
A any weight, floating or immersed in a liquid, is acted upon by a buoyant force
B Buoyant force is equal to the weight of the liquid displaced
C The point through which buoyant force acts, is called the center of buoyancy
D Center of buoyancy is located above the center of gravity of the displaced liquid v
Correct Answer: Center of buoyancy is located above the center of gravity of the displaced liquid v
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