The blades of a centrifugal impeller are said to be curved forward, if the ________ of the motion of impeller blades?

The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are________?

A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of ________?

Number of gm moles of solute dissolved in one liter of a solution is called its________?

Saddle supports are used for supporting ________ vessels?

Dust content in raw blast furnace gas is about ________ gm/Nm3; hence it is cleaned to the dust level of about < 10 mg /Nm3 before use?