M C Q s D r i v e

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.

The hydraulic turbines are also known as : ___________?
A steam turbines
B water turbines
C combustion turbines
D Gas turbines
Correct Answer: water turbines
In a centrifugal pump casing, the flow of water leaving the impeller, is___________________?
A rectilinear flow
B radial flow
C free vortex motion
D forced vortex
Correct Answer: free vortex motion
For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred_________________?
A centrifugal
B axial flow
C reciprocating
D mixed flow
Correct Answer: axial flow
High specific speed of a pump implies it is_____________________?
A centrifugal pump
B mixed flow pump
C axial flow pump
D any one of the above
Correct Answer: axial flow pump
Low specific speed of turbine implies it is__________________?
A propeller turbine
B Francis turbine
C impulse turbine
D any one of the above
Correct Answer: impulse turbine
Runaway speed of a hydraulic turbine is_________________?
A full load speed
B the speed at which turbine runner will be damaged
C the speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open
D the speed corresponding to maximum overload permissible
Correct Answer: the speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open
Medium specific speea of turbine implies it is___________________?
A propeller turbine
B Francis turbine
C impulse turbine
D any one of the above
Correct Answer: Francis turbine
The specific speed of turbine is defined as the speed of a unit___________________?
A of such a size that it delivers unit dis-charge at unit head
B of such a size that it delivers unit dis-charge at unit power
C of such a size that it requires unit power per unit head
D of such a size that it produces unit horse power with unit head
Correct Answer: of such a size that it produces unit horse power with unit head
A turbine pump is basically a centrifugal pump equipped additionally with_________________?
A adjustable blades
B backward curved blades
C vaned diffusion casing
D inlet guide blades
Correct Answer: vaned diffusion casing
In reaction turbine, draft tube is used_____________________?
A to transport water downstream without eddies
B to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
C for safety of turbine
D to increase flow rate
Correct Answer: to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section