Related Questions
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When a body is subjected to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as
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4
If Th is the torque resisting capacity of a hollow shaft and Ts is that of a solid shaft, of the same material, length and weight. Then,
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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
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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4
The buckling load for a given column depends upon
A. Area of cross-section of the column
B. Length and least radius of gyration of the column
C. Modulus of elasticity for the material of the column
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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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The bending stress in a beam is _________ section modulus.
A. Inversely proportional to two times
B. Directly proportional to
C. Inversely proportional to
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A vertical column has two moments of inertia (i.e. Ixx and Iyy ). The column will tend to buckle in the direction of the
B. Perpendicular to the axis of load
C. Maximum moment of inertia
D. Minimum moment of inertia
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4
A cycle consisting of __________ and two isothermal processes is known as Stirling cycle.
D. One constant pressure, one constant volume
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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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In an ideal gas turbine plant, it is assumed that the compression and expansion processes are
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The efficiency of a Carnot engine depends on
D. Temperatures of source and sink
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The value of Poisson's ratio for steel is between
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4
Diesel cycle consists of __________ processes.
A. Two constant volume and two isentropic
B. Two constant pressure and two isentropic
C. Two constant volume and two isothermal
D. One constant pressure, one constant volume and two isentropic
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4
The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called
A. Specific heat at constant volume
B. Specific heat at constant pressure
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4
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 maximum 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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4
The value of 1 mm of Hg is equal to
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4
Youngs modulus of a wire is defined as the stress which will increase the length of wire compared to its original length by
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When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear stress (τxy), the maximum normal stress i
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
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
Resilience of a material is considered when it is subjected to
A. Frequent heat treatment
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Proof resilience per material is known as
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The atomic mass of oxygen is
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The torque transmitted by a solid shaft of diameter (D) is (where τ = Maximum allowable shear stress)
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In a tensile test, near the elastic limit zone, the
A. Tensile strain increases more quickly
B. Tensile strain decreases more quickly
C. Tensile strain increases in proportion to the stress
D. Tensile strain decreases in proportion to the stress
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The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)
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For the same maximum pressure and temperature,
A. Otto cycle is more efficient than Diesel cycle
B. Diesel cycle is more efficient than Otto cycle
C. Dual cycle is more efficient than Otto and Diesel cycles
D. Dual cycle is less efficient than Otto and Diesel cycles
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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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In S. I. units, the value of the universal gas constant is
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The buckling load for a given material depends on
A. Slenderness ratio and area of cross-section
B. Poisson's ratio and modulus of elasticity
C. Slenderness ratio and modulus of elasticity
D. Slenderness ratio, area of cross-section and modulus of elasticity