H4P2O7 is the chemical formula of ________ phosphoric acid?

The amount of combustible escaping unconsumed from the furnace, depends upon the________?

1 centistoke is equal to ________ Redwood I seconds?

Size reduction of ________ is accomplished in steam heated rollers and roll crushers?

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a ________ calorimeter?

In which of the electric power generation system, the operating cost is minimum?