Related Questions
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4
In an ideal gas turbine plant, it is assumed that the compression and expansion processes are
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4
The value of gas constant (R) in S. I. units is
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4
The variables which control the physical properties of a perfect gas are
A. Pressure exerted by the gas
B. Volume occupied by the gas
C. Temperature of the gas
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4
When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness of the spring is given by
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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 minimum normal 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
The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called
A. Specific heat at constant volume
B. Specific heat at constant pressure
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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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The pressure exerted by an ideal gas is ________ of the kinetic energy of all the molecules contained in a unit volume of gas.
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The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to
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A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called
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A key is subjected to side pressure as well at shearing forces. These pressures are called
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When coal is first dried and then crushed to a fine powder by pulverising machine, the resulting fuel is called
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The efficiency of the dual combustion cycle for the same compression ratio is __________ Diesel cycle.
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4
An open cycle gas turbine works on
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Young's modulus is defined as the ratio of
A. Volumetric stress and volumetric strain
B. Lateral stress and lateral strain
C. Longitudinal stress and longitudinal strain
D. Shear stress to shear strain
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4
The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates, and σt, τ and σc = Permissible tensile, shearing and crushing stresses respectively)
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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
A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is
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4
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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4
According to Kelvin-Planck's statement, a perpetual motion of the __________ is impossible.
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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
In compression test, the fracture in cast iron specimen would occur along
C. At right angles to the axis of specimen
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The energy absorbed in a body, when it is strained within the elastic limits, is known as
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Within elastic limit, stress is
A. Inversely proportional to strain
B. Directly proportional to strain
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When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.
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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
Impact strength of a material is an index of its
C. Capability of being cold worked
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A thin cylindrical shell of diameter (D) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to volumetric strain is
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One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas.
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The efficiency and work ratio of a simple gas turbine cycle are