Q. 1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).

View solution

Q. The ratio of coil diameter to wire diameter of a spring is called the spring

View solution

Q. Dialysis is the process of separating substances in the

View solution

Q. Silicon crystal can be converted to p-type semi-conductor by doping with

View solution

Q. Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

View solution

Q. Increase in the entropy of a system represents the

View solution

Q. Property responsible for the talcum powder to cling to the skin is the

View solution

Q. __________ has a negative co-efficient of linear expansion.

View solution

Q. Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight

View solution

Q. Basic open hearth furnace (BOF) is not used for producing __________ steel.

View solution

Q. Principal alloying element in Elinvar (used for making hair springs for watches) is

View solution

Q. The value of y = Cᵨ/Cᵥ. at < 500°C for air & most common gases can be safely assumed to be

View solution

Q. Tesla metre per ampere (T. m/A) is the unit for the measurement of

View solution

Q. Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be

View solution

Q. Which of the following is an acidic constituent of B.F. slag ?

View solution

Q. Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is

View solution

Q. Material of construction of the electrode used in the electric resistance welding is

View solution

Q. In practice, the compression ratio of compression-ignition (CI) engine ranges from

View solution

Q. Dislocations are __________ defects.

View solution

Q. The thickness of oxide film is y at time t. If K₁, K₂ and K₃ are the temperature dependent constants, the parabolic law of oxidation is given by

View solution