Preheating prior to welding is done for the purpose of
The basic function of the drum in a boiler is to
'Flare tower' used in industry is meant for
In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:Which of the following is a cermet ?
The ultimate strength in tension for steel is __________ times the ultimate strength in shear.
The function of a nozzle provided in steam turbine is to
Optical activity is a/an __________ property.
__________ the exhaust gas is an indication of the incomplete combustion of fuel.
Presence of sulphur in steel reduces the
Pick out the wrong statement.
Which of the following has the highest modulus of elasticity (about 7 x 106 kg/cm2) ?
Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-°C. The purpose of electric current supplied to the furnace is to
A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is
Enzymes belong to the category of
What is the value of included angle of a triangular notch for maximum discharge ?
Baffles provided on the shell side of a shell and tube heat exchanger are meant for
On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.
Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs?
The activity of pure hydrogen gas at 1000°C and 5 atm pressure
Which of the following transducers is most commonly used for the measurement of shock and vibration ?
Which of the following polymers is obtained by copolymerisation of three monomers ?
Solution loss reaction occurs
Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
Colloids can be purified by
Dry saturated steam can be converted into superheated steam by
Gantt charts are used for streamlining the
__________ iron is produced by the annealing of white cast iron.
Dephosphorisation of molten pig iron is favoured by
All radiations falling on a black body are
The surface tension of a liquid, at critical temperature is
For separating small pieces of metal from engine oil of a car, the best separating technique is the
When an isolated thermodynamic system executes a process,
Fire refining process is employed in case of
Which of the following metals can not be hot worked at room temperature ?
The power of a low capacity prime mover is most suitably measured by a __________ type dynamometer.
Silicon percentage in the silicon steel used for electrical appliances/equipments is
Out of the following materials, the one which generally exhibits an yield point is
Frost formation on the evaporator tubes in the domestic refrigerators
Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.
The most prominent single cause of corrosion in boilertubes, drums, economisers and steam superheaters in a thermal power plant boiler is the
Pick out the wrong statement.
In the Bayer's process, bauxite is digested under pressure using
The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the
In a neutral solution
Styrofoam is the commercial name of
Large scale fire on fuel gas line is normally extinguished by
Which of the following is an unconventional source of energy ?
On-off control
Feed check valve is used in steam boilers to