As Academic task believes that practice is the most important way to success so do visit www.academictask.com regularly and Brush up these Mechanical Engineering MCQs regularly to prepare for competitive & entrance exams like NTS, FPSC, ETEA, PPSC, KPPSC, etc. Prepare yourself for government job exams, interviews, and make your career in engineering. Aspiring students and professionals can learn and practice our Mechanical Engineering material MCQs. Here you will find questions & answers with detailed explanations. Mechanical Engineering Objective Questions and answer cover the topic like Engineering Materials, Fluid Mechanics, Hydraulic Machines, Machine Design, Engineering Mechanics, Nuclear Power Plants, Steam Boilers, Engines, Nozzles, Turbines, Compressors, Gas Turbines, Jet Engines, Thermodynamics, Engineering Metrology, Heat Transfer, etc. Also, check basic Electrical engineering MCQs here.

11. A model of a reservoir is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

A. 900 minutes
B. 4 minutes
C. 4 x (225)3/2 minutes
D. 4 (225)1/3 minutes
E. 4 x V225 minutes

12. Normal depth in open channel flow is the depth of flow corresponding to_______________?

C. laminar flow
D. uniform flow
E. critical flow

13. For hyper sonic flow, the Mach number is___________________?

A. unity
B. greater than unity
C. greater than 2
D. greater than 4
E. greater than 10

14. Which of the following is the unit of kinematic viscosity _________________?

A. pascal
B. poise
C. stoke
E. none of the above

15. Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called________________?

B. cohesion
C. viscosity
D. compressibility
E. surface tension

16. Poise is the unit of________________?

A. surface tension
B. capillarity
C. viscosity
D. shear stress in fluids
E. buoyancy

17. Barometer is used to measure__________________?

A. pressure in pipes, channels etc.
B. atmospheric pressure
C. very low pressure
D. difference of pressure between two points
E. rain level

18. Center of buoyancy is the___________________?

A. centroid of the displaced volume of fluid
B. center of pressure of displaced volume
C. e.g. of floating ‘body
D. does not exist
E. none of the above

19. Metacentre is the point of intersection of _________________________?

A. vertical upward force through e.g. of body and center line of body
B. buoyant force and the center line of body
C. mid point between e.g. and center of buoyancy
D. all of the above
E. none of the above

20. Buoyant force is___________________?

A. resultant force acting on a floating body
B. equal to the volume of liquid displaced
C. force necessary to keep a body in equilibrium
D. the resultant force on a body due to the fluid surrounding it
E. none of the above