P99 LOW PRESSURE BOILERS FINAL EXAM QUESTIONS AND EXPECTED ANSWERS

P99 LOW PRESSURE BOILERS
FINAL EXAM QUESTIONS AND
EXPECTED ANSWERS

heat exchanger
used to transfer heat from one substance to another
without allowing the materials to mix
thermostatic steam trap
bellows filled with fluid that boils at steam pressure
float thermostatic
float rises to discharge condensate
thermodynamic steam trap
single movable disc that raises to allow discharge of air
and cool condensate
A thermodynamic steam trap opens and closes by a
___________ .
movable disc
The vacuum pump is designed to discharge air and
pump water
True
The check valve on the feedwater line should be
located closest to the shell of the boiler
False
The check valve on the feedwater line commonly has
a valve disc that swings to open and close the valve
True

, A globe valve used as feedwater stop valve must be
installed so inlet pressure is applied from under the
valve disc
True
The stop valve on the feedwater line should be located
closest to the boiler
True
The makeup water feeder can be used as a feedwater
regulator
False
The feedwater _____ valve opens and closes
automatically
check
Centrifugal feedwater pumps are commonly driven by
steam
False
The range of pressure of the vacuum switch on a
vacuum pump is usually 2" to 8"
True
The bottom blowdown line must be connected to the
highest part of the steam side of the boiler.
False
Surface impurities are removed from the boiler by
using the bottom blowdown valves.
False
Only watertube boilers have bottom blowdown valves.
False
To correct a high water level condition in the boiler,
the operator must open the bottom blowdown valve.
True