The forces, which meet at one point and their lines of action also lie on the same plane, are known as
Concurrent forces are those forces whose lines of action
A couple produces
The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as
Which of the following is the extensive property of a thermodynamic system ?
According to First law of thermodynamics
Second law of thermodynamics defines
The state of a substance whose evaporation from its liquid state is complete, is known as
All perfect gases change in volume by 1/273th of its original volume at 0ºC for every IºCchange in temperature, when the pressure remains constant. This statement is called
The absolute zero pressure will be
Relation between cp and cv is given by
The heat energy stored in the gas and used for raising the temperature of the gas is known as
Workdone in a free expansion process is
The main cause for the irreversibility is
The isothermal and adiabatic processes are regarded as
The efficiency of the Carnot cycle is
where T1 and T2 = Highest and lowest temperature during the cycle.
One tonne of refrigeration (1TR) means that the heat removing capacity is
The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
In aircraft, air refrigeration cycle is used because of
The leakage in a refrigeration system using freon is detected by
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere ?
In a four stroke engine, the working cycle is completed in
In a four stroke cycle petrol engine, the inlet valve
The inlet valve of a four stroke cycle internal combustion engine remains open for
A spark plug gap is kept from
The ignition quality of petrol is expressed by
The two reference fuels used for cetane rating are
The basic requirement of a good combustion chamber is
The effective inhibitor of pre-ignition is
A closed vessel made of steel and used for the generation of steam is called a
Water tube boilers are
The diameter of a cylindrical shall of a Scotch marine boiler varies from
Locomotive boiler is a
The fittings mounted on the boiler for its proper and safe functioning is a
Which of the following is not a boiler mounting?
The maximum heat loss is a boiler occurs due to
An air preheater is installed
The draught may be produced by a
The liquid used in manometers should have
When a body is placed over a liquid, it will sink down if
A flow whose streamline is represented by a curve, is called
The divergent portion of a venturimeter is made longer than convergent portion in order
The discharge through a large rectangular orifice is given by
where H1 = Height of the liquid above the top of the orifice.
H2 = Height of the liquid above the bottom of the orifice,
b = Breadth of the orifice, and
Cd = Coefficient of discharge
The maximum efficiency of transmission through a pipe is
Bulk modulus of a fluid is the ratio of
The force present in a moving liquid is
Which of the following is a proper sequence ?
Hook's law holds good up to
The maximum stress produced in a bar of tapering section is at
Shear modulus is the ratio of
When a body is subjected to a direct tensile stress (sx) in one plane accompanied by a
simple shear stress (txy), the maximum normal stress is
Strain energy is the
The strain energy stored in a spring, when subjected to maximum load, without suffering permanent distortion, is known as
A beam encastered at both the ends is called
The shear force at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at thecentre, is
The bending equation is
When a rectangular beam is loaded transversely, the maximum tensile stress is developed on
If the composite shaft in the above question is fixed at one end and the other end is subjected
to a torque, then its equivalent spring constant is
The buckling load for a given column depends upon
Euler's formula holds good only for
The Rankine's formula for columns is
Fatigue test is carried out for
The point of contraflexure occurs in
The motion between a pair when limited to a definite direction, irrespective of the direction of force applied, is known as
Which of the following is an example of a higher pair ?
The relation between number of pairs (p) forming a kinematic chain and the number oflinks (l) 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 total number of instantaneous centres for a mechanism of n links are
The instantaneous centre of a rigid thin disc rolling on a plane rigid surface is located at
According to India standard specifications, 100 H6/ g5 means that the
The velocity of the belt for maximum power is
The included angle for the V-belt is usually
The V-belts are made of fabric and cords moulded in rubber and covered with fabric and rubber. These belts are moulded to a trapezoidal shape and are made endless. These are particularly suitable for short drives. The included angle for the V-belt is usually from 30° to 40°.
Idler pulley is used for
18/8 steel contains
An aluminium member is designed on the basis of
Guest's theory is used for
The design sensitivity q is expressed in terms of fatigue stress concentration factor Kf and
theoretical stress concentration factor Kt, as
In designing thick cylinders, the equation used is
The pipe joint mostly used for pipes carrying water at low pressures is
Which of the following property is desirable in parts subjected to shock and impact loads ?
The carbon in the pig iron varies from
Cast iron is manufactured in
Wrought iron
Nickel when added to copper improves
Babit metal contains
In oblique cutting of metals, the cutting edge of the tool is
Continuous chips with built up edge are formed during machining of
Cast iron during machining produces
If the cutting speed is increased, then the builtup- edge
Flank wear occurs mainly on the
Crater wear occurs on the rake face of the tool, while flank wear occurs on the relief (flank) face of the tool.
The tool life is said to be over if
Lathe bed is made of
The chamfering is an essential operation after
In a planer
In centreless grinders, the regulating wheel is inclined at
Broaching is applied for machining
In ultra-sonic machining, tool is made of
The operation of cutting of a flat sheet to the desired shape is called
In shielded arc welding
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Test | 100 questions | 100 min
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Test | 100 questions | 100 min
Test | 100 questions | 100 min
Test | 100 questions | 100 min