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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

Which place in hydraulic turbine is most susceptible for cavitation __________________?
A inlet of draft rube
B blade inlet
C guide blade
D penstock
Correct Answer: inlet of draft rube
According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies______________________?
A directly as fan speed
B square of fan speed
C cube of fan speed
D square root of fan speed
Correct Answer: directly as fan speed
Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of__________________?
A 39.2%
B 49.2%
C 68.8%
D 84.8%
Correct Answer: 84.8%
According to fan laws, for fans having constant wheel diameter, the pressure varies________________?
A directly as fan speed
B square of fan speed
C cube of fan speed
D square root of fan speed
Correct Answer: square of fan speed
Pressure intensifier increases the pressure in proportion to____________________?
A ratio of diameters
B square of ratio of diameters
C inverse ratio of diameters
D square of inverse ratio of diameters
Correct Answer: ratio of diameters
According to fan laws, at constant pressure, the speed capacity and power vary_________________?
A directly as the air or gas density
B inversely as square root of density
C inversely as density
D as square of density
Correct Answer: inversely as square root of density
According to fan laws, for the fans having constant wheel diameters, the power demand varies_______________?
A directly as fan speed
B square of fan speed
C cube of fan speed
D square root of fan speed
Correct Answer: cube of fan speed
According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary________________?
A directly as the air or gas density
B inversely as square root of density
C inversely as density
D as square of density
Correct Answer: inversely as density
A hydraulic accumulator normally consists of________________?
A two cylinders, two rams and a storage device
B a cylinder and a ram
C two co-axial rams and two cylinders
D a cylinder, a piston, storage tank and control valve
Correct Answer: a cylinder and a ram
Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of_______________?
A 39.2%
B 49.2%
C 68.8%
D 84.8%
Correct Answer: 39.2%
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