Lap joints are preferred for plates having thickness ________ mm?

‘Ice point’ is designated on Fahrenheit temperature scale by________?

An isothermal aqueous phase reversible reaction, P ⇌ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3.h is given by, r = 0.5CP – 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is________?

Tyres are made by________?

Which of the following is not, a fertile material?

For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of?