Related Questions
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4
If the value of n = 0 in the equation pvn = C, then the process is called
A. Constant volume process
C. Constant pressure process
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4
The ultimate analysis of coal consists of the determination of the percentage of
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4
One kg of ethylene (C2H4) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and __________ kg of water or steam.
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4
A cube subjected to three mutually perpendicular stress of equal intensity p expenses a volumetric strain
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4
The neutral axis of the cross-section a beam is that axis at which the bending stress is
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4
Carnot cycle has maximum efficiency for
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4
Flow stress corresponds to
C. Plastic deformation of solids
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4
When gas is heated at constant pressure, the heat supplied is utilised in
A. Increasing the internal energy of gas
B. Doing some external work
C. Increasing the internal energy of gas and also for doing some external work
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4
The torque transmitted by a solid shaft of diameter (D) is (where τ = Maximum allowable shear stress)
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4
The maximum shear stress, in the given figure, is equal to __________ of the Mohr's circle.
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4
When the gas is heated at constant volume, the heat supplied
A. Increases the internal energy of the gas and increases the temperature of the gas
B. Does some external work during expansion
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4
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of spring 'A' is half that of spring 'B' The ratio of deflections in spring 'A' to spring 'B' is
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4
Which of the following statement is correct?
A. The stress is the pressure per unit area
B. The strain is expressed in mm
C. Hook's law holds good upto the breaking point
D. Stress is directly proportional to strain within elastic limit
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4
The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and σt = Allowable tensile stress for weld metal)
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4
The absolute zero temperature is taken as
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4
A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be
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4
Two shafts 'A' and 'B' transmit the same power. The speed of shaft 'A' is 250 r.p.m. and that of shaft 'B' is 300 r.p.m.
A. The shaft 'B' has the greater diameter
B. The shaft 'A' has the greater diameter
C. Both are of same diameter
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4
The weakest section of a diamond riveting is the section which passes through
D. One rivet hole of the end row
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4
A double strap butt joint with equal straps is
A. Always in single shear
B. Always in double shear
C. Either in single shear or double shear
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4
When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.
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4
A steel bar of 5 mm is heated from 25°C to 45°C and it is free to expand. The bar will induce
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4
If percentage reduction in area of a certain specimen made of material 'A' under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material 'B' is 40%, then
A. The material A is more ductile than material B
B. The material B is more ductile than material A
C. The ductility of material A and B is equal
D. The material A is brittle and material B is ductile
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4
A cycle consisting of two isothermal and two isentropic processes, is known as
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4
The point of contraflexure is a point where
A. Shear force changes sign
B. Bending moment changes sign
C. Shear force is maximum
D. Bending moment is maximum
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4
The ultimate tensile stress of mild steel compared to ultimate compressive stress is
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4
Modulus of rigidity is defined as the ratio of
A. Longitudinal stress to longitudinal strain
B. Volumetric stress to volumetric strain
C. Lateral stress to Lateral strain
D. Shear stress to shear strain
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4
The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)
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4
Which of the following has the highest calorific value?
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4
The general law for the expansion or compression of gases, is
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The efficiency of Stirling cycle is __________ Carnot cycle.