Monazite deposits constitute an important source for the following metal.
Wrought iron does not have
Ferrites are __________ magnetic.
Tip of the match stick contains a mixture of
For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg) ?
Out of the following, the rays having the lowest wavelength is the
The majority charge carriers in p-type silicon are
Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that
With increase in temperature, the electrical conductivity of semiconductors
Break even point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost
Bad odour in sanitary latrines is reduced by periodically sprinkling
Carburettor in a spark ignition engine is used to
Young's modulus of a material is the measure of its
Resilience of a material is important, when it is subjected to
'Cryogenics' is concerned with the generation & use of low temperature in the range of
Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per m2 of steel strip.
Yield strength of a material is determined by the __________ test.
Draft allowance given to patterns is for
Magnetic permeability of iron is increased by its
A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.
α-rays are
The pH value is the measure of hydrogen ion concentration in a solution. The term pH stands for the __________ in the solution.
Which of the following is not an ore of aluminium ?
In chemical dehumidification of air
Production of one ton of steel plate in a modern integrated steel plant in India consumes about __________ kWh of electricity.
Out of the following, the dimensionless quantity is
Coke is added in the blast furnace to
Sheardising process is used for
A fine grained grinding wheel should not be used for grinding __________ materials.
Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same
With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
Hardness & tensile strength of austenitic stainless steel can be increased by
The hardness of a grinding wheel is specified by the
Which of the, following is not associated with the functioning of a petrol engine ?
Unit of surface tension in S.I. unit is
__________ has the highest melting point out of the following.
__________ are not emitted by radioactive substances.
Which of the following is not used as a bearing material ?
Existence of velocity potential implies that the fluid is
The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the
Chlorine acts as a bleaching agent only in the presence of
In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.
Which of the following welding processes employs the highest welding temperature ?
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as
Current employed in resistance welding ranges from __________ kVA/cm2 .
Ceramic tips for the cutting tool are prepared from __________ powder.
When a copper ball is heated, the largest percentage increase will be in its
A balanced draught boiler furnace employs __________ draught fan.
What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?
Betweenand 370°C, blue brittleness is caused in mild steel because of the