Reynolds number of a fluid flowing in a circular pipe isWhat will be the Reynolds number when the fluid velocity is decreased by& the pipe diameter is increased by?
A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place
Specific __________ is a dimensionless quantity.
Unbreakable crockeries are made from __________ polymers.
Commonly used flux for brazing is
Hot & cold working of material causes its __________ deformation.
__________ is not a case hardening process.
Which one can be directly solidified from gaseous state wihtout entering into liquid state ?
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an
The primary strengthening mechanism in:brass is the
In radiative heat transfer, a grey surface is the one, which has
Overheating of satellites during re-entry to earth is controlled by
Commonly employed coolant for high pressure turbogenerator is
Steel is welded using the __________ flame.
__________ of test specimens is not involved in any hardness testing method.
Materials having __________ lattice structure are usually the most ductile.
For dynamic strain measurement, the wheatstone bridge used is of __________ type.
Thermoplastics are never moulded using
Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then
Which of the following is not an ore of aluminium ?
A spark ignition petrol engine has
Out of the following, the highest emf for a given temperature is generated by the __________ thermocouple.
Thermal expansion of solid is employed in the temperature measurement by a
An example of unsteady non uniform flow is the flow of liquid under pressure through a
Large diameter shafts are manufactured by
Common salt is produced from sea water in India generally by the __________ method.
__________ is not used as the control rod material in a nuclear reactor.
Cupola produces __________ iron..
Iron has got __________ isotopes.
The ratio of thermal & electrical conductivity is same for all the metals at the same temperature ; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)
Which of the following is termed as the boiler mounting ?
X-rays do not exhibit the property of
The most abundant metal present in the earth's crust is;
Slight displacement of a floating body in liquid makes it to oscillate about its
Surface tension is due to the __________ forces.
A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.then the magnitude of thickness strain is
Out of the following, the most ductile material is
What happens, when SO2 is passed through a solution of H2S in water ?
Which drug is made from vegetables ?
While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the
Boiler draught ofmm water column is equivalent to
Which is the only metal that exists in liquid state at room temperature?
Stress and strain are related by __________ elastic constants for a linearly elastic, homogeneous & isotropic material.
Which of the following contributes maximum as main source of sulphur in the blast furnace charge ?
Superheated vapour behaves like
Euler number is defined as the ratio of inertia force to __________ force.
In a fuel cell, chemical energy is converted into
Buoyancy force depends on the __________ the liquid.
The quantity of electricity required to deposit one gm equivalent of any substance is one
Which of the following will resist maxi-mum shock & vibration without cracking?