An adiabatic boundary is one which
In a quasi equilibrium process, the pressure in a system
The Kelvin temperature of a system can be measured by a
If the work done on a closed system is 20kj/kg, and 40kj/kg heat is rejected from the system, its internal energy decreases by
If a heat engine attains 100% thermal efficiency, it violates
The more effective way of increasing the efficiency of a carnot engine is to
Kelvin-plank law deals with
First law of thermodynamics deals with
All perfect gases change in volume by 1/273th of its original volume at 0ºC for every 1ºC change in temperature, when the pressure remains constant. This statement is called
The absolute zero pressure can be attained at a temperature of
The heat energy stored in the gas and used for raising the temperature of the gas is known as
When a gas is heated at constant pressure
The capacity of refrigerating machine is expressed as
One tonnes of refrigeration is equal to
COP of a carnot heat pump operating between –3ºC and 27ºC is
Oil separator in a refrigeration cycle is installed.
In electrolux refrigerator
The intake charge in a diesel engine consists of
All of followings are correct except: Inlet -valve mach index is dependent on
When crude oil is heated, then which one of the following hydrocarbon is given off first ?
Octane number of natural gas is
The air-fuel ratio of the petrol engine is controlled by
In a four stroke cycle petrol engine, the charge is ignited at
In a four stroke cycle , the minimum temperature inside the engine cylinder occurs at the
The fuel mostly used in boilers is
The incomplete combustion is indicated by the presence of
The diameter of the cylindrical shell of a Lancashire boiler is about
The function of an economizer in a steam power plant is to
Match List-I (Boiler) with List-II and select the correct answer using the codes given below the
lists:
The basic raw material of the nuclear power plant is
Steam coal is
The fittings mounted on the boiler for its proper and safe functioning is a
An economiser is generally placed between
The draught may be produced by a
The velocity distribution in a viscous flow over a plate is given by
u = 4y – y2
where, u = velocity in m/s at a point distanty fromthe plate. If the coefficient of dynamic viscosityis 1.5 pa.s, What is the shear stress at y = 1m?
In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle
q, sensitivity of inclined tube to sensitivity of U– tube equal to
The centre of pressure of a surface subject to fluid pressure is the point
Match List - I withList -II and select the correct
answer using the codes given below the lists:
List-I
a. Stream line
b. Streak line
c. Path line
d. Equipotential lines
List-II
1. Tracing of motion of any fluid particle
2. Tracing of motion of different fluid particles
3. Identification of location of number of fluid
particles
4. Orthogonal to streak lines
5. Location of equal piezometric head
How is the metacentric height (GM) expressed
Where I =Moment of inertia of the plan of the floating body at the water surface
V=Volume of the body submerged in water
BG =Distance between the center of gravity (G) and the center of Buoyancy (B)
A type of flow in which the fluid particle while moving in the direction of flow rotates about their centre is known as
The length of divergent part of venturimeter in comparision to convergent portion is
The absolute pressure is equal to
A vertically immersed surface is shown in fig. The distance of its centre of pressure from the water surface is
Bernoulli's equation is applied to
Bernoulli's equation is applicable to venturimeter, orifice meter and pitit tube.
The discharge over a rectangular weir, considering the velocity of approach, is
where H1 =Total height of water above the weir = H + Ha
H=Height of water, over the crest of the weir, and
Ha =Height of water, due to velocity of approach
In an inward flow reaction turbine
The flow ratio in case of Francis turbine varies from
The loss of strength in compression due to overloading is known is as
The following figure shows the stress-strain curve for tensile test on a mild steel specimen.
The upper yield point is represented by the point
If the Young's modulus E is equal to bulk modulus K, then the value of Poisson's ratio is
Which one of the following material has Poisson's ratio more than 1?
The following torsional terms is analogous to bending terms except
Which one of the following portions of the loaded beam shown in the figure is subjected to pure
bending?
The steel bars in reinforced cement concrete beam are located at
Modulus of rigidity may be defined as the ratio of
A bar of length L metres extends by l mm under a tensile force of P. The strain produced in the bar is
The state of stress at a point in a loaded member is shown fig. The magnitude of maximum shear stress is
The shear force at the centre of a simply supported beam with a gradually varying loadfrom zero at both ends to w per metre at the centre , is
In a simple bending of beams, the stress in the beam varies
The matter contained in a body, is called
Mass is defined as the quantity of matter contained in a body.
Two bodies of masses m1 and m2 are hung from the ends of a rope, passing over a frictionless
pulley as shown fig. The acceleration of the string will be
The unit of angular velocity is
The motion of a particle round a fixed axis is
The factor of safety for steel and for steady load is
The ratio of the ultimate stress to the design stress is known as
The diameter of the cylindrical rod on which threads are cut is known as
Failure of a material is called fatigue when it fails
In static loading stress concentration is more serious in
In case of pressure vessels having closed ends, the fluid pressure induces
The pipe joint mostly used for pipes carrying water at low pressure is
The lead screw of a lathe with nut is a
A Kinematic chain is known as mechanism when
According to Kennedy's therorem, the instantaneous centres of three bodies havingrelative motion lie on a
A Hook's joint is used to connect
The maximum efficiency of worm and worm wheel system is
In which one of the following is a flywheel generally employed
The motion of a shaft in a circular hole is an example of
The relation between number of links (l) and number of joints (j) in a kinematic chain is
The mechanism forms a structure, when the number of degrees of freedom (n) is equal to
Scotch yoke mechanism is used to generate
The relative ability of the liquid metal to fill in the mould at a given temperature is knowns as
which of the following gating ratio represents pressurised gating systems ?
Which of the following are the most likely characteristics in centrifugal casting ?
Which of the following casting process can suitably replace a rolling operation?
Angle between the face and flank of the single point cutting tool is known as
Single point thread cutting tool should ideally have
A turret lathe is useful for
Grinding wheel is balanced
The soldering process is carried out in the temperature range
The main constituents of soldering alloy are
material removed by machanical action in
Grey cast iron has
Which of the following is a point imperfection?
The heat treatment process used for castings is
Induction hardening is basically a
Babbit metal is a
Monel meteal is an alloy of
Loam sand is a mixture of
The welding process used in joining mild steel shanks to high speed drills, is
In shielded arc welding
Doc | 3 Pages
Test | 100 questions | 100 min
Test | 100 questions | 100 min
Test | 100 questions | 100 min
Test | 100 questions | 100 min
Test | 100 questions | 100 min