Question Paper ESE Mechanical Engineering

1. A tank of length, breadth and height in the ratio of 2:1:2 is full of water. The ratio of hydrostatic force at the bottom to that at any larger vertical surface is
A. 1
B. 4
C. 2
D. 3 
Answer: (a)
2. Which of the following fluids exhibit a certain shear stress at zero shear strain rate followed by a straight line relationship between shear stress and shear strain rate?
A. Newtonian fluids
B. Ideal Bingham plastic fluids
C. Pseudo-plastic fluids
D. Dilatent fluids 
Answer: (b)
3. What is the specific gravity of a marble stone, which weighs 400N in air, and 200N in water? (g=10m/s2)
A. 8
B. 6
C. 4
D. 2 
Answer: (d)
4. What is the intensity of pressure in the following SI units, when specific gravity of mercury is 13.6 and the intensity of pressure is 400KPa?
A. 0.3 bar or 4.077m of water or 0.29 m of Hg
B. 4 bar or 5.077m of water or 0.399 m of Hg
C. 0.3 bar or 5.077m of water or 0.599 m of Hg
D. 4 bar or 4.077m of water or 0.299 m of Hg 
Answer: (a)
5. Consider the following statements:
1. If a small upward displacement is given to a floating body, it results in the reduction of the buoyant force acting on the body
2. A slight horizontal displacement does not change either the magnitude or the location of the buoyant force 
Which of the above statements is/are correct?
A. Both 1 and 2
B. 1 only
C. 2 only
D. Neither 1 nor 2 
Answer: (a)
6. In a stream line steady flow, two points A and B on a stream line are 1m apart and the flow velocity varies uniformly from 2m/s to 5m/s. What is the acceleration of fluid at B?
A. 3 m/s2
B. 6 m/s2
C. 9 m/s2
D. 15 m/s2 
Answer: (d)
7. The boundary layer thickness at a given distance from the leading edge of a flat plate is
A. More for lighter fluid
B. More for denser fluid
C. Less for denser fluid
D. Less for lighter fluid 
Answer: (a)
8. In a laminar flow through a circular pipe, the discharge varies
A. Linearly with fluid density
B. Inversely with pressure drop
C. Directly as square of pipe radius
D. Inversely with fluid velocity 
Answer: (d)
9. A fluid is flowing over a flat plate. At distance of 8 cm from the leading edge, the Reynolds number is found to be 25600. The thickness of the boundary layer at this point is
A. 1.5mm
B. 2.5mm
C. 4.0mm
D. 5.0mm 
Answer: (b)
10. Air is flowing over a flat plate with a free stream velocity of 24 m/s, and its kinematic viscosity is 72 ×10-6 m2/s. If at a particular point, the Reynolds number is 30000, its location from the leading edge is
A. 0.05m
B. 0.07m
C. 0.08m
D. 0.09m 
Answer: (d)
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