Explore topic-wise MCQs in Engineering.

Thermal diffusivity is a

In aqua-ammonia and Lithium-bromide water absorption refrigeration systems, the refrigerants are respectively

As relative humidity decreases, the dew point temperature will be __________ wet bulb temperature.

Reynolds number (R_N) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, = Density of fluid, c_p = Specific heat at constant pressure, and = Coefficient of absolute viscosity)

The total radiation from a black body per second per unit area is __________ fourth power of the absolute temperature. This statement is known as Stefan-Boltzmann law.

The process of heat transfer from a hot body to a cold body, in a straight line, without affecting the intervening medium, is called radiation.

In hot machining, tool is made of

In ultra-sonic machining, the metal is removed by

The machining of titanium is difficult due to

Lapping is an operation of

In orthogonal cutting system, the maximum chip thickness occurs at the middle.

Grinding wheels should be tested for balance

The velocity of tool relative to the workpiece is known as cutting velocity.

Which of the following statement is wrong about ultra-sonic machining?

The different spindle speeds on a lathe form

A drill considered as a cutting tool having zero rake, is known as a

In oblique cutting system, the maximum chip thickness occurs at the middle.

If the helix angle of the drill is made __________ 30 , then the torque required to drive the drill at a given feed will be more.

Larger end cutting edge angle __________ tool life.

The lead screw of a lathe has __________ threads.

Gear lapping is an operation

The facing is an operation of

A fixture is defined as a device which

The lip angle of a single point tool is usually

The average cutting speed for turning brass with a high speed steel tool is

The maximum production of small and slender parts is done by

Side rake angle on tools is provided to control chip flow.

A left hand tool on a lathe cuts most efficiently when it travels

The method of grinding used to produce a straight or tapered surface on a workpiece, is

Which of the following statement is incorrect with reference of lathe cutting tools?

In the relation VTⁿ = C, the value of n for carbide tools is

In up milling, the thickness of chip is

The optimum effective temperature for human comfort is

The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is

A fixture does not guide the tool.

The by-pass factor for a cooling coil

The difference between dry bulb temperature and wet bulb temperature, is called

Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)

Defrosting of a refrigerator may be done by stopping the compressor for a short period.

The heat transfer by conduction through a thick sphere is same as through a thick cylinder.

The heat transfer by conduction through a thick sphere is given by

The efficiency of a jet engine is higher at

A perfect black body is one which

The coefficient of performance of Heat Pump is always __________ one.

The volume of air delivered by the compressor is called

The maximum delivery pressure in a rotary air compressor is

During adiabatic saturation process on unsaturated air __________ remains constant.

The rotary compressors are suitable for large discharge of air at low pressure.

The stagnation pressure rise in a centrifugal compressor takes place

An open cycle gas turbine works on the same cycle as that of a closed cycle gas turbine.