Are you guys looking for Mechanical Engineering MCQ Questions with Answers PDF Free Download as per Mechanical Engineering new exam pattern? You came to the right page. This may assist you to understand and check your knowledge about the Subjects. Students also can take a free test of the Multiple Choice Questions of Mechanical Engineering. Each question has four options followed by the right answer. These Mechanical Engineering MCQ Questions are selected supported by the newest exam pattern.
Q1. Working principle of dead weight pressure gauge tester is based on
(A) Pascal’s law
(B) Dalton’s law of partial pressure
(C) Newton’s law of viscosity
(D) Avogadro’s hypothesis
Answer: (A) Pascal’s law
Q2. Reynold’s number is the ratio of the inertia force to the
(A) Surface tension force
(B) Viscous force
(C) Gravity force
(D) Elastic force
Answer: (B) Viscous force
Q3. The upper surface of a weir over which water flows is known is
(A) Crest
(B) Nappy
(C) Sill
(D) Weir top
Answer: (C) Sill
Q4. If the depth of water in an open channel is greater than the critical depth, the flow is called
(A) Critical flow
(B) Turbulent flow
(C) Tranquil flow
(D) Torrential flow
Answer: (C) Tranquil flow
Q5. In an internal mouthpiece, the absolute pressure head at vena contracta is __ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.
(A) Less than
(B) More than
(C) Equal to
(D) None of these
Answer: (A) Less than
Q6. A flow in which the quantity of liquid flowing per second is constant, is called __ flow.
(A) Steady
(B) Streamline
(C) Turbulent
(D) Unsteady
Answer: (A) Steady
Q7. A point, in a compressible flow where the velocity of fluid is zero, is called
(A) Critical point
(B) Vena contracta
(C) Stagnation point
(D) None of these
Answer: (C) Stagnation point
Q8. According to equation of continuity,
(A) w1a1 = w2a2
(B) w1v1 = w2v2
(C) a1v1 = a2v2
(D) a1/v1 = a2/v2
Answer: (C) a1v1 = a2v2
Q9. The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __ of the total supply head.
(A) One-half
(B) One-third
(C) Two-third
(D) None of these
Answer: (B) One-third
Q10. The product of mass and acceleration of flowing liquid is called
(A) Inertia force
(B) Viscous force
(C) Gravity force
(D) Pressure force
Answer: (A) Inertia force
Q11. The body will float if the force of buoyancy is __ the weight of the liquid displaced.
(A) Equal to
(B) Less than
(C) More than
(D) None of these
Answer: (C) More than
Q12. The process of diffusion of one liquid into the other through a semi permeable membrane is called
(A) Viscosity
(B) Osmosis
(C) Surface tension
(D) Cohesion
Answer: (B) Osmosis
Q13. Choose the wrong statement
(A) Any weight, floating or immersed in a liquid, is acted upon by a buoyant force
(B) Buoyant force is equal to the weight of the liquid displaced
(C) The point through which buoyant force acts, is called the center of buoyancy
(D) Center of buoyancy is located above the center of gravity of the displaced liquid
Answer: (D) Center of buoyancy is located above the center of gravity of the displaced liquid
Q14. The atmospheric pressure at sea level is
(A) 103 kN/m2
(B) 10.3 m of water
(C) 760 mm of mercury
(D) All of these
Answer: (D) All of these
Q15. Rotameter is a device used to measure
(A) Absolute pressure
(B) Velocity of fluid
(C) Flow
(D) Rotation
Answer: (C) Flow
Q16. The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
(A) 4.1 sec
(B) 5.2 sec
(C) 10.4 sec
(D) 14.1 sec
Answer: (C) 10.4 sec
Q17. A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is
(A) 1
(B) 5
(C) 7
(D) 6
Answer: (D) 6
Q18. One cubic metre of water weighs
(A) 100 liters
(B) 250 liters
(C) 500 liters
(D) 1000 liters
Answer: (D) 1000 liters
Q19. When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as
(A) Steady flow
(B) Turbulent flow
(C) Vortex flow
(D) Uniform flow
Answer: (C) Vortex flow
Q20. An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of
(A) 1
(B) 1.2
(C) 0.8
(D) 0.75
Answer: (D) 0.75
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