Which one of the following Mohr’s circles represents the state of pure shear?
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Solution
State of pure shear
A single parallel fillet weld of total length L and weld size h subject to a tensile load P, will have the design stress:
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Solution
In a reaction turbine, stage enthalpy drop in the stator blader is 4.62 kJ/kg and in the rotor blade is 2.38 kJ/kg. Then, the degree of reaction will be ________.
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Solution
The diameter of a shaft is increased from 30 mm to 60 mm, all other conditions remaining unchanged. How many times,the torque carrying capacity of shaft will be increased.
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Solution
A hydraulic pressure have a ram of 20 cm diameter and a plunger of 5 cm diameter. The force required at the plunger to lift a weight of 16 × 104 N will be ________.
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Solution
Which one of the following cast irons consists of carbon in rosette form?
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Solution
Nodular cast iron consists of carbon in rosette form. It is a grey cast iron with lamellar graphite. It contains 0.04 to 0.06% magnesium, cerium. Properties depend on size, number and arrangement of graphite bollos in cast iron
A cantilever of length L, moment of inertia I, young’s modulus E carries a concentrated load w at the middle of its length.The slope of cantilever at free end is:
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Solution
Slope of cantilever at free end = \(\frac{wL^{2}}{8EI}\)
where w =Load, L = length,E = Young’s modulur of Elasticity,I = Moment of inertia.
In a flat belt drive, the belt can be subjected to a maximum tension T and centrifugal tension TC. The condition for transmission of maximum power is:
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Solution
Which one of the following is the value of helix angle for maximum efficiency of a square threaded screw.
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Solution
Helix angle for maximum efficiency of a square threaded screw = (45 – φ/2).
There are two bodies of equal masses are rotating along a circular path of radius R1 and R2 with same speed. The ratio of their centripetal forces would be equal to:
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Solution
Ratio of centripetal force =\(\left ( \frac{R_{1}}{R_{2}} \right )^{2}\)