A fire tube boiler occupies less space than a water tube boiler, for a given power.

Steam at a high pressure and in large quantities can be produced with a simple vertical boiler.

A simple vertical boiler has one fire tube.

all of the above

blow off cock

fusible plug

superheater

stop valve

one-fourth

one-third

two-fifth

three-fifth

increases

decreases

has no effect on

none of these

internally fired

externally fired

internally as well as externally fired

none of these