Are you guys looking for Mechanical Engineering MCQ Questions with Answers PDF Free Download as per Mechanical Engineeringnew 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. When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure
(A) Varies as the square of the radial distance
(B) Increases linearly as its radial distance
(C) Increases as the square of the radial distance
(D) Decreases as the square of the radial distance
Answer: (A) Varies as the square of the radial distance
Q2. The velocity corresponding to Reynold number of 2800, is called
(A) Sub-sonic velocity
(B) Super-sonic velocity
(C) Lower critical velocity
(D) Higher critical velocity
Answer: (D) Higher criticalvelocity
Q3. The force present in a moving liquid is
(A) Inertia force
(B) Viscous force
(C) Gravity force
(D) All of these
Answer: (D) All of these
Q4. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as
(C) Stagnation pressure
(D) Bulk modulus
Answer: (B) Drag
Q5. In an external mouthpiece, the absolute pressure head at vena contracta is __ the atmospheric pressure head by an amount equal to 0.89 times the 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. Rain drops are spherical because of
(B) Air resistance
(C) Surface tension forces
(D) Atmospheric pressure
Answer: (C) Surface tension forces
Q7. Flow occurring in a pipeline when a valve is being opened is
Answer: (B) Unsteady
Q8. Manometer 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: (A) Pressure in pipes, channels etc.
Q9. The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)
(A) 0.855 a.√(2gH)
(B) 1.855 aH.√(2g)
(C) 1.585 a.√(2gH)
(D) 5.85 aH.√(2g)
Answer: (A) 0.855 a.√(2gH)
Q10. According to Newton’s law of viscosity, the shear stress on a layer of a fluid is __ to the rate of shear strain.
(A) Equal to
(B) Directly proportional
(C) Inversely proportional
(D) None of these
Answer: (B) Directly proportional
Q11. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)
(D) None of these
Answer: (B) K/ρ
Q12. When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called
(A) Gauge pressure
(B) Absolute pressure
(C) Positive gauge pressure
(D) Vacuum pressure
Answer:(C) Positive gauge pressure
Q13. The unit of surface tension is
Answer: (A) N/m
Q14. Uniform flow occurs when
(A) The direction and magnitude of the velocity at all points are identical
(B) The velocity of successive fluid particles, at any point, is the same at successive periods of time
(C) The magnitude and direction of the velocity do not change from point to point in the fluid
(D) The fluid particles move in plane or parallel planes and the streamline patterns are identical in each pleasure
Answer: (C) The magnitude and direction of the velocity do not change from point to point in the fluid
Q15. Which of the following statement is wrong?
(A) A flow whose streamline is represented by a curve is called two dimensional flow.
(B) The total energy of a liquid particle is the sum of potential energy, kinetic energy and pressure energy.
(C) The length of divergent portion in a Venturimeter is equal to the convergent portion.
(D) A pitot tube is used to measure the velocity of flow at the required point in a pipe.
Answer: (C) The length of divergent portion in a Venturimeter is equal to the convergent portion.
Q16. The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to
(B) Equilibrium of a floating body
(C) Archimedes’ principle
(D) Bernoulli’s theorem
Answer: (C) Archimedes’ principle
Q17. The power transmitted through the pipe is maximum when the head lost due to friction is equal to
(A) One-fourth of the total supply head
(B) One-third of the total supply head
(C) One-half of the total supply head
(D) Two-third of the total supply head
Answer: (B) One-third of the total supply head
Q18. Property of a fluid by which its own molecules are attracted is called
Q19. For a floating body to be in equilibrium
(A) Meta centre should be above e.g.
(B) Centre of buoyancy and e.g. must lie on same vertical plane
(C) A righting couple should be formed
(D) All of the above
Answer: (D) All of the above
Q20. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water?
(A) 10 m/sec
(B) 25 m/sec
(C) 2 m/sec
(D) 50 m/sec
Answer:(C) 2 m/sec
We hope the given Mechanical Engineering MCQ Questions with Answers will definitely yield fruitful results. Hope you got enough ideas on the MCQs on Mechanical Engineering. If you have any queries related to Mechanical Engineering MCQs Multiple Choice Questions with Answers, drop your questions below and will get back to you in no time.