In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?

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The hardenability of steel decreases with__________________?

A. Decrease in dislocation density B. Increase in solutionising temperature C. Increase in strength D. Decrease in grain size...

The product (s) of roasting of a sulphide ore is (are) ?

A. Oxide only B. Sulphate only C. Oxide and sulphate D. Dependent on temperature and partial pressure of oxygen & sulphur dioxide...

Which of the following gases cause global warming ?

A. Carbon monoxide B. Carbon dioxide C. Nitrogen D. Ozone...

High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from _______________ percent ?

A. 5 to 10 B. 15 to 25 C. 45 to 50 D. 75 to 80...

For an ideal gas, Cp – Cv is____________________?

A. R B. -R C. 0 D. (3/2) R...