Q. Which of the following is not an ore of aluminium ?

View solution

Q. Heat treatment of steel is done to mainly change its __________ properties.

View solution

Q. Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.

View solution

Q. Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that

View solution

Q. The hardness of a grinding wheel is specified by the

View solution

Q. Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)₂ __________ with increasing temperature.

View solution

Q. While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ x Tm (where, Tm Melting temperature).

View solution

Q. The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.

View solution

Q. Carburettor in a spark ignition engine is used to

View solution

Q. __________ are not emitted by radioactive substances.

View solution

Q. The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is

View solution

Q. Which of the following is an inedible oil ?

View solution

Q. Light year is the unit of

View solution

Q. Ingrannular corrosion occurs __________ stainless steel.

View solution

Q. In case of fluid moving machineries, the relationship between saturation temperature and pressure decides the process of

View solution

Q. Factor of safety is the ratio of the __________ stress to the working stress.

View solution

Q. The majority charge carriers in p-type silicon are

View solution

Q. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same

View solution

Q. With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.

View solution

Q. Between 230 and 370°C, blue brittleness is caused in mild steel because of the

View solution