A ball bearing is characterized by basic static capacity =11000 N and dynamic capacity =18000 N. This bearing is subjected to equivalent static load = 5500N. Then the bearing loading ratio and life in million revolution will be ________.
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Solution
Which one of the following is not a necessary information input to Material Requirement Planning?
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Solution
Sequence of operations on the job is not required input for MRP (Material Requirement Planning).
The arm of a radial drilling machine is being raised at a speed of 3.9 m/min. by single start square threads of 6 mm pitch and 30 mm diameter. The speed of screw will be ________.
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Solution
In the atomic hard sphere model of the crystal structure of copper, the edge length of unit cell will be: (where ‘r’ is atomic radius)
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Solution
Match List-I with List-II
List-I List-II
A.Clapeyron’s theorem 1.Deflection of beam
B.Maculays’ method 2.Eccentrically loaded column
C.Perry’s formula 3.Riveted joints
4.Continuous beam Codes
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Solution
Clapeyron’s theorem = continuous beam
Maculay’s theorem = Deflection of beam.
Perry’s formula = Eccentrically loaded column.
A close coiled helical spring is made up of 5 mm diameter wire coiled to 50 mm mean diameter. Maximum shear stress inspring under the action of an axial force is 20 N/mm2. The maximum shear stress in a spring made of 3 mm diameter wire coiled to 30 mm mean diameter under the action of force is________.
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Solution
For flow over a flat plate, the hydrodynamic boundary layer thickness is 0.5mm. The dynamic viscosity is 25 × 10–6Pa-s,specific heat is 2 kJ/kg-k and thermal conductivity is 0.05 w/mk. Then, the thermal boundary layer thickness will be________.
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Solution
In a reversible isothermal expansion process, the fluid expands from 10 bar and 2 m3 to 2 bar and 10 m3, during the process and the heat supplied is 100 kw. Then the work done during the process will be ________.
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Solution
The humidity ratio of atmospheric air at 28°C DBT and 760 mm of Hg is 0.016 kN/m2. Then the partial pressure of water vapour will be ________.
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Solution
The angle of rotation of a rigid body is given by θ= θ0 + At + Bt2. In which, A, B, are constants and t is time in seconds. If w= 4π rad/sec at t = 0 and w = 2π rad/sec after 1 second from start, then the values of constants will be ________.
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Solution