Explore topic-wise MCQs in Mechanical Engineering Questions.

This section includes 266 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

251.

In a centrifugal pump, the liquid enters the pump__________________?
A. at the top
B. at the bottom
C. at the center
D. from sides
E. none of the above
Answer» D. from sides
Discussion
252.

Low 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
E. none of the above
Answer» B. mixed flow pump
Discussion
253.

Puck up the wrong statement about centrifugal pump_______________?
A. discharge a diameter
B. head a speed2
C. head a diameter
D. Power a speed3
E. none of the above is wrong
Answer» B. head a speed2
Discussion
254.

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%
E. 91.6%.
Answer» B. 49.2%
Discussion
255.

Impulse turbine is generally fitted______________________?
A. at the level of tail race
B. little above the tail race
C. slightly below the tail race
D. about 2.5 m above the tail race to avoid cavitation
E. about 2.5 m below the tail race to avoid cavitation
Answer» C. slightly below the tail race
Discussion
256.

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
E. special type of pump with storage device and a pressure regulator
Answer» C. two co-axial rams and two cylinders
Discussion
257.

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
E. as square root of density
Answer» D. as square of density
Discussion
258.

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
E. as square root of density
Answer» C. inversely as density
Discussion
259.

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%
E. 91.6%.
Answer» E. 91.6%.
Discussion
260.

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
E. fourth power of ratio of diameters
Answer» C. inverse ratio of diameters
Discussion
261.

Low specific speed of turbine implies it is__________________?
A. propeller turbine
B. Francis turbine
C. impulse turbine
D. any one of the above
E. none of the above
Answer» D. any one of the above
Discussion
262.

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
E. none of the above
Answer» D. the speed corresponding to maximum overload permissible
Discussion
263.

Medium specific speea of turbine implies it is___________________?
A. propeller turbine
B. Francis turbine
C. impulse turbine
D. any one of the above
E. none of the above
Answer» C. impulse turbine
Discussion
264.

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
E. none of the above
Answer» C. reciprocating
Discussion
265.

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
E. none of the above
Answer» D. any one of the above
Discussion
266.

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
E. none of the above
Answer» D. forced vortex
Discussion