zero

minimum

maximum

none of these

too small

too large

medium

none of these

inside admission valve

outside admission valve

piston slide valve

none of these

D-slide valve

governor

Meyer's expansion valve

flywheel

The primary unbalanced force is less than the secondary unbalanced force.

The primary unbalanced force is maximum twice in one revolution of the crank.

The unbalanced force due to reciprocating masses varies in magnitude and direction both.

The magnitude of swaying couple in locomotives is inversely proportional to the distance between the two cylinder centre lines