Related Questions
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4
A column of length (l) with both ends fixed may be considered as equivalent to a column of length __________ with both ends hinged.
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4
The ratio of elongation in a prismatic bar due to its own weight (W) as compared to another similar bar carrying an additional weight (W) will be
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4
A continuous beam is one which is
B. Fixed at one end and free at the other end
C. Supported on more than two supports
D. Extending beyond the supports
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4
When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear stress (τxy), the maximum shear stress is
A. (σx/2) + (1/2) × √(σx² + 4 τ²xy)
B. (σx/2) - (1/2) × √(σx² + 4 τ²xy)
C. (σx/2) + (1/2) × √(σx² - 4 τ²xy)
D. (1/2) × √(σx² + 4 τ²xy)
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4
For riveting, the size of hole drilled in plates is __________ shank diameter of rivet.
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4
The section modulus of a circular section about an axis through its C.G., is
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The heating of a gas at constant pressure is governed by
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Impact strength of a material is an index of its
C. Capability of being cold worked
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In an ideal gas turbine plant, it is assumed that the compression and expansion processes are
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A column is said to be a short column, when
A. Its length is very small
B. Its cross-sectional area is small
C. The ratio of its length to the least radius of gyration is less than 80
D. The ratio of its length to the least radius of gyration is more than 80
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4
First law of thermodynamics deals with
B. Conservation of momentum
D. Conservation of energy
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Hooke's law holds good up to
B. Limit of proportionality
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When wood is heated with a limited supply of air to a temperature not less than 280°C, the resulting fuel is
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The total strain energy stored in a body is termed a
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A bar of copper and steel form a composite system, which is heated to a temperature of 40°C. The stress induced in the copper bar will be
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4
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
A. Combustion is at constant volume
B. Expansion and compression are isentropic
C. Maximum temperature is higher
D. Heat rejection is lower
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4
The amount of heat required to raise the temperature of __________ water through one degree is called kilojoules.
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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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Modulus of rigidity may be defined as the ratio of
A. Linear stress to lateral strain
B. Lateral strain to linear strain
C. Linear stress to linear strain
D. Shear stress to shear strain
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The gas in cooling chamber of a closed cycle gas turbine is cooled at
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For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)
A. p v = constant, if T is kept constant
B. v/T = constant, if p is kept constant
C. p/T = constant, if v is kept constant
D. T/p = constant, if v is kept constant
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4
The rivets are used for __________ fastenings.
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4
The efficiency and work ratio of a simple gas turbine cycle are
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4
Which of the following materials is most elastic?
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4
During which of the following process does heat rejection takes place in Carnot cycle?
C. Isothermal compression
D. Isentropic compression
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The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)
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4
The stress developed in a material at breaking point in extension is called
D. Ultimate tensile stress
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An adiabatic process is one in which
A. No heat enters or leaves the gas
B. The temperature of the gas changes
C. The change in internal energy is equal to the mechanical workdone
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When a body is subjected to biaxial stress i.e. direct stresses (σx) and (σy) in two mutually perpendicular planes accompanied by a simple shear stress (τxy), then minimum normal stress is
A. (σx + σy)/2 + (1/2) × √[(σx - σy)² + 4 τ²xy]
B. (σx + σy)/2 - (1/2) × √[(σx - σy)² + 4 τ²xy]
C. (σx - σy)/2 + (1/2) × √[(σx + σy)² + 4 τ²xy]
D. (σx - σy)/2 - (1/2) × √[(σx + σy)² + 4 τ²xy]
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A cycle consisting of two isothermal and two isentropic processes, is known as