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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

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
Air vessels in reciprocating pump are used to__________________?
A smoothen flow
B reduce acceleration to minimum
C increase pump efficiency
D save pump from cavitation
Correct Answer: reduce acceleration to minimum
In axial flow fans and turbines, fluid enters and leaves as follows________________?
A radially, axially
B axially, radially
C axially, axially
D radially, radially
Correct Answer: axially, axially
The angle of taper on draft tube is A. greater than 15° B. greater than 8° C. greater than 5° D. less than 8° E. less than 3°.___________________?
A greater than 15°
B greater than 8°
C greater than 5°
D less than 8°
Correct Answer: less than 8°
Reaction turbines are used for____________________?
A low head
B high head
C high head and low discharge
D high head and high discharge
Correct Answer: low head
The flow rate in gear pump___________________?
A increases with increase in pressure
B decreases with increase in pressure
C more or less remains constant with in-crease in pressure
D unpredictable
Correct Answer: more or less remains constant with in-crease in pressure
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