Entropy may be expressed as a function of
Which of the following is not a conserved quantity ?
Which of the following conditions are favourable for liquefaction of a gas?
The work done in a reversible adiabatic process from state 1 to states 2 is given by
Ratio of specific heat for an ideal gas is given by
The Characteristic equation of gases PV = nRT holds good for
In thermodynamics analysis, a pure substance is that which
The measurement of a thermodynamic property known as temperature is based on
The behaviour of super heated vapour is similar to that of
According to Avogadro's law
The processes occurring in open system which permit the transfer of mass to and from the system, are known as
A process, in which the working substance neither receives nor gives out heat to its surroundings during its expansion or compression, is called
One tonne refrigerator machine means that
Air refrigeration cycle is generally employed in
Which is usually the costliest item in a refrigeration system ?
The relative coefficient of performance is equal to
An external gear with 60 teeth meshes with a pinion of 20 teeth, module being 6 mm. What is the centre distance in mm ?
The top of the piston in two-stroke engine is
Main advantage of a two- stroke engine over four-stroke engine is
Compression ratio in case of CI engine is in the range of
For an Otto cycle, the increase in compression ratio leads to
For the same peak pressure and work output
In a four stroke cycle petrol engine, the expansion
The spark ignition engines are governed by
In thermal power plants, the dearator is used mainly to
Which device is used in thermal power plants to reduce level of pollution?
Which one of the following is NOT and accessory for the boiler ?
The shape of the lid of a manhole in a boiler is
Match List-I (Type of boiler) with List-II (Features) select the correct answer using the
codes given below the lists:
1. Vertical fire tube
2. Horizontal fire tube
3. Bent water tube
4. Once through flow
5. Inclined water tube
In parson's turbine ifa is nozzle angle, then what is the maximum efficiency of the turbine
The critical pressure ratio for maximum discharge through a nozzle is given by
The shell of the Cochran boiler is made hemispherical
Which of the following statement is wrong?
Blow off cock in a boiler is used to
The time of oscillation of a floating body with increase in metacentric height will be
All the terms of energy of Bernoulli's equation have dimension of
The turbulent flow has
The logarithmic velocity distribution is observed in
If a set of pipes described by (L1, D1, f1), (L2,D2,f2)....... are connected in series then an
equivalent pipe (Le, De,fe) is related as
An open channel of symmetric right angled triangular cross-section is conveying a discharge Q. Taking gas the acceleration due to gravity,what is the critical depth ?
Match List I (Physical properties of fluid) with List II (Dimensions/definitions) and select the
correct answer using the codes given below the lists
The Bernoulli's equation is based on the assumption that
The discharge through an external mouthpiece is given by
The total energy line lies over the hydraulic gradient line by an amount equal to the
The viscosity of water at 20º C is
A fluid whose viscosity does no change with the rate of deformation of shear strain is known as
A fluid which obeys the Newton's law of viscosity is termed as
The point of contraflexure in a beam is at the location where the
Consider the simply supported beam AB subjected to the point loads of equal magnitudeas shown in the diagram below:
Which one of the following statement is correct?The position CD of the beam is
At the neutral axis of simply beam, there is
A cantilever beam of rectangular cross-section is subjected to a concentrated load at its free end. The state of stress at a point P on the centroidal longitudinal axis of beam is given by
If the principal stresses on a plane stress problem are s1 = 100 MPa and s2 = 40 MPa, then themagnitude of shear stress (in MPa) will be
At a principal plane
Maximum shear stress in a Mohr's circle
The maximum principal stress theory is also known as
A thin cylindrical shell of internal diameter d and thickness 't' is subjected to internal pressure 'p'. The change in diameter is given by
The ratio of bulk modulus to Young's modulus for a Poisson's ratio of 0.25 will be
Within elastic limit, shear stress is ......... shear strain.
A beam extending beyond the supports is called
The linear velocity of a body rotating atw rad/ s along a circular path of radius r is given by
The periodic time (T) is given by
A pendulum which executes one beat per second is known as
The ideal angle of banking provided on the curves on roads depends upon
The piston rod and the cross head in a steam engine are usually connected by means of
Match List-I (Application) with List-II (Joint) and select the correct answer using the code
given below the lists:
The endurance limit i.e., resistance to fatigue of a machine element can be improved by
In cyclic loading, stress concentration is more serious in
In case of pressure vessels having open ends, the fluid pressure induces
According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by
The efficiency of a riveted joint is equal to
The difference between addendum and dedendum is known as
Train value of a gear train is
Which of the following machines does not require a flywheel ?
A Hartnell governor is a governor of the
Sensitivity of an isochronous governor is
For a governor running at constant speed, what is the value of the force acting on the sleeve
Which one of the following causes whirling of shafts?
The pair is known as a higher pair, when the relative motion between the elements of a pair is
An automobile steering gear is an example of
In a steam engine, the link constitutes a
Cores are used in the casting to
Cold shut (lap) may occur in products obtained by
Collapsible tooth paste tubes are manufactured by
Cutting tool material 18-4-1 HSS has which one of the following composition
Milling operation which produces flat vertical surfaces on both side of a work piece is known as
The purpose of reaming is
Grey cast iron is usually welded by
The temperature of plasma torch is of the order is
Which of the following material is best cut by oxy-cutting process ?
The temperature of the heat produced by an arc is around
When a steel containing more than 0.8% carbon in cooled slowly below the lower critical point, it consists of
When the steel is normalised, its
Which of the following is a case hardening process?
Induction hardening is basically a
In oblique cutting system, the cutting edge of the tool
Ceramic tools are fixed to tool body by
The tool life is affected by
Tool life is generally better when
Which of the following operation is first performed ?
In drilling brass, a drill with