Exam Details
2017 Mechanical Engineering
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Questions
150
Duration
180 mins
Package
Indian Economic Service and Indian Statistical Service Examination - Previous Year Papers
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150questions
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Sample questions from this paper
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2017 · Unclassified
2017 Mechanical Engineering
A section of a dam made of concrete, ρ = 2·6, total height = 35 m, with top walkway width of 6 m, is shown. The upstream bottommost point is called the Heel of the dam. The sloped part on downstream side is 3 vertical on 2 horizontal. Water stands till 2 m short of the top of the dam section. The net resultant force acting on the base level of the dam is nearly
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2017 · Unclassified
2017 Mechanical Engineering
A spherical waterdrop of 1 mm in diameter splits up in air into 64 smaller drops of equal size. The surface tension coefficient of water in air is 0·073 N/m. The work required in splitting up the drop is
2017 · Unclassified
2017 Mechanical Engineering
Consider the following statements pertaining to stability of floating bodies:
1. A floating body will be stable when the centre of gravity is above the centre of buoyancy.
2. The positions of metacentres corresponding to different axes of rotation are generally different for the same floating object.
3. For cargo ships, the metacentric height varies with loading.
Which of the above statements are correct?
2017 · Unclassified
2017 Mechanical Engineering
Water is coming out from a tap and falls vertically downwards. At the tap opening, the stream diameter is 20 mm with uniform velocity of 2 m/s. Assuming steady inviscid flow, constant pressure atmosphere everywhere, and neglecting curvature and surface tension effects, the diameter of the stream 0·5 m below the tap opening is nearly
2017 · Unclassified
2017 Mechanical Engineering
Consider the following statements regarding Bernoulli's equation :
1. It is assumed that no energy has been supplied.
2. The velocity of a steady stream of fluid flow will depend on the cross-sectional area of the stream.
3. Consider two sections 1 and 2 along a flow stream. In this reach, if q is work done by a pump, u is work absorbed by turbine, ρ is density of water and g is acceleration of gravity, with p, v and z carrying standard meanings, Bernoulli's equation will read
(p1/ρ) + (v1²/2g) + z1 = (p2/ρ) + (v2²/2g) + z2 + w + g
Which of the above statements are correct?
2017 · Unclassified
2017 Mechanical Engineering
An oil flows through a pipe at a velocity of 1.0 m/s. The pipe is 45 m long and has 150 mm diameter. What is the head loss due to friction, if ρ = 869 kg/m³ and μ = 0.0814 kg/m s?