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4
The state of a substance whose evaporation from its liquid state is complete, is known as
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The ultimate tensile stress of mild steel compared to ultimate compressive stress is
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4
The pull required to crush the rivet per pitch length is
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4
Which of the following is the extensive property of a thermodynamic system?
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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
An open cycle gas turbine works on
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4
When both ends of a column are fixed, the effective length is
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The absolute zero pressure can be attained at a temperature of
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4
Hooke's law holds good up to
B. Limit of proportionality
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4
The ratio of molar specific heats for mono-atomic gas is
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Euler's formula holds good only for
C. Both short and long columns
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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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The absolute zero temperature is taken as
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The hard coke is obtained when carbonisation of coal is carried out at
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A composite bar made up of steel and copper bars of equal lengths are heated through 100°C. The stresses developed shall be
A. Tensile in both the material
B. Tensile in steel and compressive in copper
C. Compressive in steel and tensile in copper
D. Compressive in both the materials
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4
For the beam shown in the below figure, the shear force diagram between A and B is
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4
For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order
A. Dual cycle, Diesel cycle, Otto cycle
B. Otto cycle, Diesel cycle, Dual cycle
C. Dual cycle, Otto cycle, Diesel cycle
D. Diesel cycle, Otto cycle, Dual cycle
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4
Slenderness of a column is zero when
B. Column is supported on all sides throughout the length
C. Length is equal to radius of gyration
D. Length is twice the radius of gyration
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4
The main cause for the irreversibility is
A. Mechanical and fluid friction
B. Unrestricted expansion
C. Heat transfer with a finite temperature difference
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When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.
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4
If the depth is kept constant for a beam of uniform strength, then its width will vary in proportional to
A. Bending moment (i.e. M)
B. Bending moment² (i.e. M²)
C. Bending moment³ (i.e. M³)
D. Bending moment⁴ (i.e. M⁴)
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4
The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is
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4
The entropy may be expressed as a function of
A. Pressure and temperature
B. Temperature and volume
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Elasticity of Mild Steel specimen is defined by
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Flow stress corresponds to
C. Plastic deformation of solids
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The calorific value of gaseous fuel is expressed in
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According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.
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If the radius of wire stretched by a load is doubled, then its Youngs modulus will be
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The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to
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4
Strain is defined as the ratio of
A. Change in volume to original volume
B. Change in length to original length
C. Change in cross-sectional area to original cross-sectional area