The behaviour of super-heated vapour is similar to that of
Perfect gas
Air
Steam
Ordinary gas
Correct Answer :
A. Perfect gas
Related Questions
The atomic mass of sulphur is
12
14
16
32
According to Avogadro's law, the density of any two gases is __________ their molecular masses, if the gases are at the same temperature and pressure.
Equal to
Directly proportional to
Inversely proportional to
None of these
The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will
Increase
Decrease
Remain unchanged
Increase/decrease depending on application
The polytropic index (n) is given by
log (p1p2)/log (v1v2)
log (p2/ p1)/log (v1/ v2)
log (v1/ v2)/ log (p1/p2)
log [(p1v1)/(p2v2)]
The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight
Of same magnitude as that of bar and applied at the lower end
Half the weight of bar applied at lower end
Half of the square of weight of bar applied at lower end
One fourth of weight of bar applied at lower end
The shear force diagram of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length will be
A right angled triangle
An isosceles triangle
An equilateral triangle
A rectangle
A composite bar made up of steel and copper bars of equal lengths are heated through 100°C. The stresses developed shall be
Tensile in both the material
Tensile in steel and compressive in copper
Compressive in steel and tensile in copper
Compressive in both the materials
A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum normal stress will be
400 MPa
500 MPa
900 MPa
1400 MPa
When two plates are butt together and riveted with cover plates with two rows of rivets, the joint is known as
Lap joint
Butt joint
Single riveted single cover butt joint
Double riveted double cover butt joint
When a perfect gas is expanded through an aperture of minute dimensions, the process is known as
Isothermal process
Adiabatic process
Free expansion process
Throttling process
In order to know whether a column is long or short, we must know its
Ultimate shear stress of the column
Factor of safety
Torque resisting capacity
Slenderness ratio
Which of the following is an intensive property of a thermodynamic system?
Volume
Temperature
Mass
Energy
The capacity of a strained body for doing work on the removal of the straining force, is called
Strain energy
Resilience
Proof resilience
Impact energy
A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as
Cracking
Carbonisation
Fractional distillation
Full distillation
The moment of resistance of a balanced reinforced concrete beam is based on the stresses in
Steel only
Concrete only
Steel and concrete both
None of these
A simply supported beam with a gradually varying load from zero at B and w per unit length at A is shown in the below figure. The shear force at B is equal to
wl/6
wl/3
wl
2wl/3
In S. I. units, the value of the universal gas constant is
8.314 J/kg mole-K
83.14 J/kgmole-K
831.4 J/kgmole-K
8314 J/kgmole-K
The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by
Boyle's law
Charles' law
Gay-Lussac law
All of these
The most probable velocity of the gas molecules is given by
√(KT/m)
√(2KT/m)
√(3KT/m)
√(5KT/m)
Shear modulus is the ratio of
Linear stress to linear strain
Linear stress to lateral strain
Volumetric strain to linear strain
Shear stress to shear strain
The throttling process is __________ process.
Reversible
Irreversible
Reversible or irreversible
None of these
Stirling cycle consists of
Two constant volume and two isentropic processes
Two constant volume and two isothermal processes
Two constant pressure and two isothermal processes
One constant volume, one constant pressure and two isentropic processes
For which material the Poisson's ratio is more than unity
Steel
Copper
Aluminium
None of the above
One molecule of oxygen consists of __________ atoms of oxygen.
2
4
8
16
According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end free is __________ the crippling load for a similar column hinged at both the ends.
Equal to
Less than
More than
None of these
One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to
800 K
1000 K
1200 K
1400 K
The buckling load for a given column depends upon
Area of cross-section of the column
Length and least radius of gyration of the column
Modulus of elasticity for the material of the column
All of the above
Producer gas is obtained by
Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Carbonisation of bituminous coal
Passing steam over incandescent coke
Passing air and a large amount of steam over waste coal at about 650°C
The gas constant (R) is equal to the
Sum of two specific heats
Difference of two specific heats
Product of two specific heats
Ratio of two specific heats
The given figure shows the Mohr's circle of stress for two unequal and like principal stresses (σx and σy) acting at a body across two mutually perpendicular planes. The normal stress on an oblique section making an angle θ with the minor principle plane is given by
OC
OP
OQ
PQ