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. An ideal flow of any fluid must fulfill the following
(A) Newton’s law of motion
(B) Newton’s law of viscosity
(C) Pascal’ law
(D) Continuity equation
Answer: (D) Continuity equation
Q2. An internal mouthpiece is said to be running free if the length of the mouthpiece is __ the diameter of the orifice.
(A) Less than twice
(B) More than twice
(C) Less than three times
(D) More than three times
Answer: (C) Less than three times
Q3. The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)
(A) wA
(B) wx
(C) wAx
(D) wA/x
Answer: (C) wAx
Q4. The total energy line lies over the hydraulic gradient line by an amount equal to the
(A) Pressure head
(B) Velocity head
(C) Pressure head + velocity head
(D) Pressure head – velocity head
Answer: (B) Velocity head
Q5. Choose the wrong statement
(A) Fluids are capable of flowing
(B) Fluids conform to the shape of the containing vessels
(C) When in equilibrium, fluids cannot sustain tangential forces
(D) When in equilibrium, fluids can sustain shear forces
Answer: (D) When in equilibrium, fluids can sustain shear forces
Q6. The pressure of the liquid flowing through the divergent portion of a Venturimeter
(A) Remains constant
(B) Increases
(C) Decreases
(D) Depends upon mass of liquid
Answer: (C) Decreases
Q7. If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
(A) Higher than the surface of liquid
(B) The same as the surface of liquid
(C) Lower than the surface of liquid
(D) Unpredictable
Answer: (C) Lower than the surface of liquid
Q8. When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of
(A) A triangle
(B) A paraboloid
(C) An ellipse
(D) None of these
Answer:(B) A paraboloid
Q9. If the surface of liquid is convex, men
(A) Cohesion pressure is negligible
(B) Cohesion pressure is decreased
(C) Cohesion pressure is increased
(D) There is no cohesion pressure
Answer:(C) Cohesion pressure is increased
Q10. A flow through an expanding tube at constant rate is called
(A) Steady uniform flow
(B) Steady non-uniform flow
(C) Unsteady uniform flow
(D) Unsteady non-uniform flow
Answer: (B) Steady non-uniform flow
Q11. Center of pressure compared to e.g. is
(A) Above it
(B) Below it
(C) At same point
(D) Above or below depending on area of body
Answer: (B) Below it
Q12. The two important forces for a floating body are
(A) Buoyancy, gravity
(B) Buoyancy, pressure
(C) Buoyancy, inertial
(D) Inertial, gravity
Answer: (A) Buoyancy, gravity
Q13. The unit of dynamic viscosity in S.I. units is
(A) N-m/s2
(B) N-s/m2
(C) Poise
(D) Stoke
Answer: (B) N-s/m2
Q14. Unit of surface tension is
(A) Energy/unit area
(B) Velocity/unit area
(C) Both of the above
(D) It has no units
Answer:(A) Energy/unit area
Q15. The critical depth meter is used to measure
(A) Velocity of flow in an open channel
(B) Depth of flow in an open channel
(C) Hydraulic jump
(D) Depth of channel
Answer: (C) Hydraulic jump
Q16. The center of pressure of a surface subjected to fluid pressure is the point
(A) On the surface at which resultant pressure acts
(B) On the surface at which gravitational force acts
(C) At which all hydraulic forces meet
(D) Similar to metacentre
Answer: (A) On the surface at which resultant pressure acts
Q17. The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to
(A) 2,100
(B) 2,700
(C) 10,000
(D) 21,000
Answer: (D) 21,000
Q18. The flow in a pipe or channel is said to be uniform when
(A) The liquid particles at all sections have the same velocities
(B) The liquid particles at different sections have different velocities
(C) The quantity of liquid flowing per second is constant
(D) Each liquid particle has a definite path
Answer: (A) The liquid particles at all sections have the same velocities
Q19. An ideal flow of any fluid must satisfy
(A) Pascal law
(B) Newton’s law of viscosity
(C) Boundary layer theory
(D) Continuity equation
Answer: (D) Continuity equation
Q20. The discharge of a depressed nappe is 6 to 7 percent __ that of a free nappe.
(A) Less than
(B) More than
(C) Equal to
(D) None of these
Answer: (B) More than
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