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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

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
Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between_________________?
A lift and resultant force
B drag and resultant force
C lift and tangential force
D lift and drag
Correct Answer: lift and resultant force
Casting of a centrifugal pump is designed so as to minimize________________?
A friction loss
B cavitation
C static head
D loss of kinetic energy
Correct Answer: loss of kinetic energy
High specific speed of turbine implies it is__________________?
A propeller turbine
B Francis turbine
C impulse turbine
D any one of the above
Correct Answer: propeller turbine
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