Molal specific heats of an ideal gas depend on
There is no work transfer involved in this process
A carnot engine operates between 27ºC and 327ºC. If the engine produces 300 kj of work,what is the entropy change during heat addition ?
Three engines A, B and Coperating on Argon, Oxygen and Air respectively. Which engine will have higher efficiency ?
At critical point the enthalpy of vaporization is
Increase in entropy of a system represents
The knocking tendency in compression ignition engines increase with
In SI engine, knocking tendency increases with increase in compression ratio. In CI engine, knocking tendency decreases with increase in compression ratio and vice versa. If compression ratio is low in CI engine, there will not be enough temperature generation for ignition of the fuel air mixture.
The cetane number of automotive diesel fuel used in India is in which one of the following ranges ?
The delay period in CI engine depends upon which of the following ?
What is the cause of reheat factor in a steam turbine ?
Blade erosion in steam turbines takes place
Mobility of statically indeterminate structure is
The path of contact in involute gears is
Mitre gears are used for
Bevel gears have their teeth
Which one of the following governor is widely used in Gramophone
Which of the following are antifriction bearing
Bearing used for heavy loads are
Hydrostatic law of pressure is given as
A 70 kg person walks on snow with a total foot implant area of 500 cm2. What pressure doeshe exert on snow ?
The centre of buoyancy is
During floods, water entered an office having wooden tables. The position of tables, if floating,will be
While using boundary layer equations, Bernoulli's equation
The Euler's equation of motion is a statement of
Which one of the following is measured by a rotameter ?
The number of elastic constant for a completely anisotropic elastic material are
The number of elastic constant for a orthotropic material are
What is the relationship between the linear elastic properties young's modulus (E), rigidity modulus (G) and bulk modulus (K) ?
Slenderness ratio is defined as the ratio of
The slenderness ratio of a section is
Euler's formula holds good only for
A thin cylindrical shell of diameter d, length L and thickness t is subjectd to an internal pressure
p. What is the ratio of longitudinal strain to hoop strain in terms of Poission's ratio (1/m) ?
The volumetric strain in case of a thin cylindrical shell of diameter d, thickness t, subjected to
internal pressure p is
The correct sequence of elements of 18-4=1 HSS tool is
In relation VTn = C, the value of n, for ceramic tools
Ceramic cutting tool chip are fixed to the tool body by
Bolt heads are manufactured by
Generally the value of point angle of a drill is
The different speeds on lathe are provided in
The two parts of a sand casting mould are called
Fluidity is greatly influenced by
In D.C. reverse polarity arc welding
In which of the following welding techniques in vacuum environment required
Which one of the following welding processes consists of minimum heat affected zone
Which one of the following is not an electric resistance method of welding
A medium carbon steel workpiece is turned on a lath at 50 m/ min cutting speed, 0.8 mm/ revfeed and 1.5 mm depth of cut, what is the rate of metal removal
In a typical metal cutting operation, using a cutting tool of positive rake a = 10º. It was observed that the shear angle was 20º the friction angle is
Primary tool force used in calculating the total power consumption in machining is
When the molten metal is poured in a mould, it may pass through the following items in sequence
A trepanning tool is used on
In solidification of metal during casting, compensation for solid contraction is
When trying to turn a key into a lock, following is applied
Properties of substances like pressure, temperature and density , in thermodynamic coordinates are
A perpetual motion machine is
Air refrigerators work on
Second law of thermodynamics defines
An isentropic process on T-S diagram is represented by a
The area under curve on T-S diagram represents the
Dynamic viscosity (m) has the dimensions as
The co-efficient of discharge (Cd) in terms of Cv and Cc is
For viscous flow between two parallel plates, the pressure drop per unit length is equal to
Total energy line (T.E.L) represents the sum of
Hydraulic gradient line (H.G. L.) represents the sum of
The loss of head due to sudden contraction of a pipe is equal to
The property of a material by virtue of which a body returns to its original shape after removal of the load is called
The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to
The dimension of young's modulus of elasticity is given by
Match the items in columns I and II
There are two points P and Q on a planar rigid body. The relative velocity between the two points
In the figure shown, the relative velocity of link 1 with respect of link 2 is 12m/ sec. Link 2 rotates at a constant speed of 120 rpm. The magnitude of Coriolis component of acceleration of link 1 is
Axial thrust is minimum in case of
Gearing contact is which one of the following ?
If the two pulleys in a belt drive have different values of coefficient of friction, then the design will be based on the pulley for which
Alloy containing Tin is
The ductility of a material with work hardening
Which among the following is slowest speed operation in lathe
Soft materials can not be economically grinded due to
Feed rate in milling operation is expressed as
The machining process which makes a stepped cylindrical recess at the top of a hole to accommodate bolt head is called
Internal and external threads of different pitches can be produced by
The casting defect which is not caused by the high pouring temperature of melt is
The impurities in true centrifugal casting
In a gas welding of mild steel using an neutral flame the total amount of acetylene consurmed is 10 litre. the oxygen consumption is
Pinch effect in welding is the result of
The maximum heat in resistance welding is at the
If a i is the rake angle of the cutting tool f is the shear angle and V is the cutting velocity, velocity of chip sliding along the shear plane is given by
The size of inlet valve of an engine in comparison to exhaust valve is
The domestic refrigerator uses following type of compressor
The adiabatic equation of a perfect gas is
The forces which meet at one point, but their lies of action do not lie in a plane are called
Concurrent Non coplanar forces
Ø In this system, all forces do not lie in the same plane, but their line of action passes through a single point ( O ).
Ø Any two forces of a concurrent force system determine a plane, their resultant is determined by parallelogram law.
A perfact gas
The buoyancy depends on
Euler's dimensionless number relates the following
Liquids transmit pressure equally in all the directions. This is according to
Centre of pressure compared to c.g. is
Flow of water in a pipe about 3 metres in diameter can be measured by
The equation of continuity of flow is based on the principle of conservation of
The length of divergent portion of ventrumeter in comparison to convergent portion is
The intensity of stress which causes unit strain is called
True stress- strain curve for materials is plotted between