Related Questions
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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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4
The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)
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4
A beam is loaded as cantilever. If the load at the end is increased, the failure will occur
B. At the tip below the load
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4
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 gas constant (R) is equal to the __________ of two specific heats.
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4
If the slenderness ratio for a column is 100, then it is said to be a _________ column.
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4
A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m, and then the hoop stress will be
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4
In a steady flow process, the ratio of
A. Heat transfer is constant
B. Work transfer is constant
C. Mass flow at inlet and outlet is same
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4
The columns whose slenderness ratio is less than 80, are known as
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4
The efficiency of Ericsson cycle is __________ Carnot cycle.
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4
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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4
The standard value of atmospheric pressure taken at sea level is
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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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4
The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)
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4
Stirling cycle consists of
A. Two constant volume and two isentropic processes
B. Two constant volume and two isothermal processes
C. Two constant pressure and two isothermal processes
D. One constant volume, one constant pressure and two isentropic processes
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4
The compression ratio for petrol engines is
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4
Which of the following has the minimum atomic mass?
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4
The reading of the pressure gauge fitted on a vessel is 25 bar. The atmospheric pressure is 1.03 bar and the value of 'g' is 9.81 m/s2. The absolute pressure in the vessel is
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4
One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas.
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4
The hyperbolic process is governed by
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The strain energy stored in a solid circular shaft subjected to shear stress (τ), is: (Where G = Modulus of rigidity for the shaft material)
A. τ²/ 2G × Volume of shaft
B. τ/ 2G × Volume of shaft
C. τ²/ 4G × Volume of shaft
D. τ/ 4G × Volume of shaft
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4
The temperature at which the volume of a gas becomes zero is called
A. Absolute scale of temperature
B. Absolute zero temperature
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4
The efficiency of a gas turbine is given by
A. (Net work output)/(Workdone by the turbine)
B. (Net work output)/(Heat supplied)
C. (Actual temperature drop)/(Isentropic temperature drop)
D. (Isentropic increase in temperature)/(Actual increase in temperature)
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4
During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm². Ultimate tensile strength of specimen is
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4
The polytropic index (n) is given by
B. log (p2/ p1)/log (v1/ v2)
C. log (v1/ v2)/ log (p1/p2)
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4
The layer at the centre of gravity of the beam as shown in the below figure, will be
C. Neither in tension nor in compression
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4
Mond gas is obtained by
A. Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
B. Carbonisation of bituminous coal
C. Passing steam over incandescent coke
D. Passing air and a large amount of steam over waste coal at about 650°C
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4
The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)
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4
A cube subjected to three mutually perpendicular stress of equal intensity p expenses a volumetric strain
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4
The efficiency of Stirling cycle is __________ Carnot cycle.