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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

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%
Puck up the wrong statement about centrifugal pump_______________?
A discharge a diameter
B head a speed2
C head a diameter
D Power a speed3
Correct Answer: discharge a diameter
Hydraulic accumulator is used for____________________?
A accumulating oil
B supplying large quantities of oil for very short duration
C generally high pressures to operate hydraulic machines
D supplying energy when main supply fails
Correct Answer: supplying energy when main supply fails
A hydraulic intensifier 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: two co-axial rams and two cylinders
Maximum impulse will be developed in hydraulic ram when ___________________?
A waste valve closes suddenly
B supply pipe is long
C supply pipe is short
D ram chamber is large
Correct Answer: waste valve closes suddenly
According to fan laws, at constant speed and capacity, the pressure 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: directly as the air or gas density
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