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. A pitot tube is used to measure the
(A) Velocity of flow at the required point in a pipe
(B) Pressure difference between two points in a pipe
(C) Total pressure of liquid flowing in a pipe
(D) Discharge through a pipe
Answer: (A) Velocity of flow at the required point in a pipe
Q2. 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
Answer: (B) Atmospheric pressure
Q3. A fluid is said to be ideal, if it is
(A) Incompressible
(B) Viscous and incompressible
(C) Inviscous and compressible
(D) Inviscous and incompressible
Answer: (D) Inviscous and incompressible
Q4. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __ from the liquid surface.
(A) H/3
(B) H/2
(C) 2H/3
(D) 3H/4
Answer: (C) 2H/3
Q5. The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is
(A) 2.4 m
(B) 3.0 m
(C) 4.0 m
(D) 5.0 m
Answer: (B) 3.0 m
Q6. A body floats in stable equilibrium
(A) When its meatcentric height is zero
(B) When the metacentre is above e.g.
(C) When its e.g. is below its center of buoyancy
(D) Metacentre has nothing to do with position of e.g. for determining stability
Answer: (B) When the metacentre is above e.g.
Q7. Newton’s law of viscosity is a relationship between
(A) Shear stress and the rate of angular distortion
(B) Shear stress and viscosity
(C) Shear stress, velocity and viscosity
(D) Pressure, velocity and viscosity
Answer: (A) Shear stress and the rate of angular distortion
Q8. If the depth of water in an open channel is less than the critical depth, the flow is called
(A) Critical flow
(B) Turbulent flow
(C) Tranquil flow
(D) Torrential flow
Answer: (D) Torrential flow
Q9. When a body floating in a liquid, is displaced slightly, it oscillates about
(A) C.G. of body
(B) Center of pressure
(C) Center of buoyancy
(D) Metacentre
Answer: (D) Metacentre
Q10. The value of coefficient of velocity for a sharp edged orifice __ with the head of water.
(A) Decreases
(B) Increases
(C) Remain same
(D) None of these
Answer: (B) Increases
Q11. Liquids
(A) Cannot be compressed
(B) Occupy definite volume
(C) Are not affected by change in pressure and temperature
(D) None of the above
Answer: (D) None of the above
Q12. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as
(A) Narrow-crested weir
(B) Broad-crested weir
(C) Ogee weir
(D) Submerged weir
Answer: (D) Submerged weir
Q13. A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury?
(A) 0.5
(B) 0.4
(C) 0.515
(D) 0.5
Answer: (C) 0.515
Q14. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?
(A) The pressure on the wall at the liquid level is minimum
(B) The pressure on the bottom of the wall is maximum
(C) The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum
(D) The pressure on the bottom of the wall is zero
Answer: (C) The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum
Q15. Venturimeter is used to
(A) Measure the velocity of a flowing liquid
(B) Measure the pressure of a flowing liquid
(C) Measure the discharge of liquid flowing in a pipe
(D) Measure the pressure difference of liquid flowing between two points in a pipe line
Answer: (C) Measure the discharge of liquid flowing in a pipe
Q16. Choose the wrong statement
(A) Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force
(B) Viscosity is due primarily to interaction between fluid molecules
(C) Viscosity of liquids decreases with increase in temperature
(D) Viscosity of liquids is appreciably affected by change in pressure
Answer: (D) Viscosity of liquids is appreciably affected by change in pressure
Q17. The absolute pressure is equal to
(A) Gauge pressure + atmospheric pressure
(B) Gauge pressure – atmospheric pressure
(C) Atmospheric pressure – gauge pressure
(D) Gauge pressure – vacuum pressure
Answer: (A) Gauge pressure + atmospheric pressure
Q18. The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream
(A) Keeps on increasing
(B) Keeps on decreasing
(C) Remain constant
(D) May increase/decrease
Answer:(C) Remain constant
Q19. The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
(A) Pressure head
(B) Velocity head
(C) Pressure head + velocity head
(D) Pressure head – velocity head
Answer: (A) Pressure head
Q20. In a depressed nappe
(A) The pressure below the nappe is atmospheric
(B) The pressure below the nappe is negative
(C) The pressure above the nappe is atmospheric
(D) The pressure above the nappe is negative
Answer: (B) The pressure below the nappe is negative
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