QUESTION CARRY 2 MARK
In a steady flow adiabatic turbine, the changes in a internal energy,enthalpy, kinetic energy and potential energy of the working fluid, from inlet to exit are –100 kJ/kg, –140 kJ/kg, –10 kJ/kg and 0 kJ/kg respectively. The amount of work developed by turbine will be ………………..
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Solution
QUESTION CARRY 2 MARK
A heat engine is supplied with 250 kJ/s of heat at a constant fixed temperature of 227°C, the heat is rejected at 27° C, the cycle is reversible, then amount of heat rejected is ………………..
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Solution
QUESTION CARRY 2 MARK
Match List-I with List-II.
List-I List-II
A.Heat exchangers 1.View factor
B.Turbulent flow 2.Effectiveness
C.Free convection 3.Nusselt number
D.Radiation Heat 4.Eddy diffuivity
transfer
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Solution
Heat exchangers = Effectiveness
Turbulent flow = Eddy diffusivity
Free convection = Nusselt number
Radiation heat transfer = view factor
The atmospheric air at 760 mm of Hg, dry bulb temperature 15°C and wet bulb temperature 11°C enters a heating coil whose temperature is 41°C. If the by-pass factor of the heating coil is 0.5, then the dry bulb temperature of air leaving the coil will be ………………..
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Solution
An aircraft is flying at speed of 800 km/h at an altitude,where the atmospheric temperature is –20°C. The approximates value of the Mach number of the air craft will be ………………..
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Solution
QUESTION CARRY 2 MARK
Two Pelt on wheels A and B have the same specific speed and are woking under the same head when A produces 400 kw at 1000 rpm. If B produces 100 kw, then its rpm is ………………..
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Solution
QUESTION CARRY 2 MARK
A 4-stroke diesel engine, when running at 2000 rpm has an injection duration of 1.5 ms. The corresponding duration of the crank angle in degrees will be………………..
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Solution
QUESTION CARRY 2 MARK
In a reverted gear train, two gears P and Q are meshing,Q– R is a compound gear, and R and S are meshing. The modules of P and Rare 4 mm and 5 mm respectively. The number of teeth in P, Q and Rare 20, 40 and 25 respectively. The number of teeth in S is ………………..
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Solution
QUESTION CARRY 2 MARK
A circular rod of diameter d welded to a rigid flat by acircular fillet weld of throat thickness t is subjected to a twisting moment T. The maximum shear stres induced in the weld is:
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Solution
QUESTION CARRY 2 MARK
A cantilever beam of 2 m length supports a triangularly distributed load over its entire length, the maximum of which is at the free end.The total load is 37.5kN. The bending moment at the fixed end will be ………………..
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Solution