In attrition test used to find the rate of wear of stones, wear should be equal to or less than _______ for good buildin…

For a stone to be used in road work, coefficient of hardness should be greater than _______

In a chilled water system, the refrigerant is used to cool the air directly while in the direct expansion system, a seco…

Dolomite is a bicarbonate of _____ and _______

Which of the following is not a component of packaged air conditioners?

Thermal insulation keeps the room cool in winters and hot in summers.

According to Indian Standards, overall thermal transmittance of a wall should not be more than ______ kcal/m2 h deg C.

Viscous type filters are made of screens of spilt wire and coated with non-drying viscous oil in order to catch and remo…