Related Questions
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4
If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle
D. Depends on other factors
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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
For riveting, the size of hole drilled in plates is __________ shank diameter of rivet.
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4
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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4
The efficiency of Ericsson cycle is __________ Carnot cycle.
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Which of the following gas is mostly used in town for street and domestic lighting and heating?
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4
Which of the following cycles is not a reversible cycle?
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After reaching the yielding stage while testing a mild steel specimen, strain
C. Increases without any increase in load
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The property of a material by virtue of which a body returns to its original, shape after removal of the load is called
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One kg of hydrogen requires 8 kg of oxygen and produces
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4
The moment of resistance of a balanced reinforced concrete beam is based on the stresses in
C. Steel and concrete both
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In a prismatic member made of two materials so joined that they deform equally under axial stress, the unit stresses in two materials are
B. Proportional to their respective moduli of elasticity
C. Inversely proportional to their moduli of elasticity
D. Average of the sum of moduli of elasticity
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Workdone during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)
A. (p1 v1 - p2 v2)/(γ - 1)
B. [m R (T1 - T2)] /(γ - 1)
C. [m R T1/(γ - 1)][1 - (p2 v2 /p1 v1)]
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4
According to Kelvin-Planck's statement, a perpetual motion of the __________ is impossible.
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4
The extremeties of any diameter on Mohr's circle represent
B. Normal stresses on planes at 45°
C. Shear stresses on planes at 45°
D. Normal and shear stresses on a plane
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When a rectangular beam is loaded transversely, the maximum compressive stress is developed on the
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4
Strain re-setters are used to
C. Measure volumetric strain
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4
An open cycle gas turbine works on
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The ultimate tensile stress of mild steel compared to ultimate compressive stress is
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The bending equation is
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One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas.
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The heating of gas at constant volume is governed by
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The ratio of lateral strain to the linear strain within elastic limit is known as
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In the torsion equation T/J = τ/r = Gθ/ L, the term J/R is called
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Workdone in a free expansion process is
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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
The most probable velocity of the gas molecules is given by
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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
In an extensive property of a thermodynamic system
A. Extensive heat is transferred
B. Extensive work is done
C. Extensive energy is utilised
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When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring (δ) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material)