Specific speed of a fluid machine (a) isspecific to the particular machine (b) refers to the speed of a machine of unit dimensions (c) depends only upon the head under which the machine operates (d) is a type-number representative of its performance
150 mm of Hg is ____ in H20 column
- 1.04 m
- 2.04 m
- None
- 1.50 m
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The rate of deformation depends on duration of application, for which of the following type of fluid?
- Dilatunt
- Rheopectic
- Bingham
- Psuedoplastic
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With increase of temperature, which of the following is correct ?
- All the above
- Viscocity, decreases in liquids and increases in gases
- Molecular momentum transfer increases in gases
- Intermolecular cohesive forces of attraction increases in liquids
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Which of the following is true for a submerged body under stable equilibrium?
- Center of gravity (CG) lies below metacenter (M)
- Center of gravity (CG) lies below center of buoyancy (CB)
- Center of gravity (CG) and metacenter (M) coincides
- Center of gravity (CG) lies above metacenter (M)
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1 mm of Hg = _____ N/m2
- 133.5
- 127.5
- 149
- 100
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Velocity vector V = ax i + ay j passes through (1,2); equation of streamline is ?
Unsteady and uniform flow is true for which of the following case ?
- Flow through a tapered pipe at constant rate
- Flow through pipe with constant diameter at increasing rate
- Flow through a tapered pipe with increasing rate
- Flow through a long pipe with constant diameter and constant rate
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Which of the following is a 3 dimensional flow ?
- Flow between plates
- None
- Shooting flows
- Flood flows
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Velocity V = (x+2y+2) i + (4-y) j is ?
- None
- Compressible & irrotational
- Incompressible & irrotational
- Compressible & rotational
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Q) A pitot tube is used to measure velocity of water in a pipe using a differential gauge which contains a manometric fluid of specific gravity 1.4. Find the manometric deflection if the velocity of flow is 1.2 m/s
Q) A horizontal pipe of diameter 'd' suddenly enlarges to 'D'. Find D/d, such that the rise of pressure for a given discharge past the enlargement shall be maximum
a)1 b)1.5 c)1.414 d)1.732
A gas turbine develop 120kj of work while the compressor absorbed 60kj of work and the heat supplied is 200kj. If a regenerator which would recover 40% of the heat in the exhaust were used then the inc. In overall thermal efficiency
- 5.7%
- 8.6%
- 6.9%
- 10.2%
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Q) The velocity profile in a laminar flow through a pipe of diameter 'D' is given by U = Uo ( 1 - (4r^2/D^2) ) 'r' is the radial distance. D: is the diameter of the pipe. The pressure drop in the pipe of length 'l' is ?
Q) In a laminar flow through a pipe of radius 10 cm the average velocity is 5 m/s the the velocity at 5 cm radius is ?
a) 5 m/s b) 10 m/s c) 7.5 m/s d) 3.5 m/s
Q) In a laminar flow through a pipe of diameter 'D' the average velocity is the local velocity at a radial distance of 'r' from the center line of the pipe, then 'r' = ?
a) D/2 b) D/2root2 c) R/2 d) R
Shrinkage allowance is made by... A. + external and internal dimension B. - ext and int dim C. - ext dim and + int dim D. + ext dim and - int dim