PIPE 6009 - Steam Traps (Chp 17) Flashcards
A mechanical steam trap:
A) Can be fitted in any position
B) May have a thermostatic air vent
C) Has alcohol inside the float
D) Should be fitted to the safety valve drain
E) Has a very low pressure range of operation
B) May have a thermostatic air vent
A steam trap, that has a discharge temperature higher than the temperature corresponding to the condensate return, indicates that:
A) The check valve in the condensate line has failed
B) The trap is passing steam
C) The inlet steam is superheated
D) The trap is plugged up
E) There is condensate being collected by the trap
B) The trap is passing steam
The sudden closing of a valve in a water pipeline can result in:
A) A pressure shock wave to surge through the pipeline
B) A sudden decrease in the velocity of the water
C) A flow reversal of water in the pipeline
D) All of the above
E) An increase in water pressure at the valve
D) All of the above
A steam trap that is in service but feels cold indicates that:
A) The steam is cold B) The trap is plugged C) The condensate line is frozen D) The steam in not superheated E) The trap is passing steam
B) The trap is plugged
Steam traps are usually located at the:
A) Hottest point of a steam line B) Lowest point of a hot water line C) Lowest point of a steam line D) Highest point of a hot water line E) Highest point of a steam line
C) Lowest point of a steam line
A thermostatic trap is controlled by a:
A) Combination of a bucket and a float
B) Temperature difference between condensate and steam
C) High level float control
D) Bucket that flips when filled with condensate
E) Difference in velocity between condensate and steam
B) Temperature difference between condensate and steam
A _____ should be installed just ahead of a steam trap.
A) Pressure gauge B) Check valve C) Pressure reducing valve D) Non-return valve E) Strainer
E) Strainer
Before admitting steam to any system:
A) All valves must be open
B) All valves must be closed
C) Any check valves in the line must be opened
D) Condensate must be removed from the system
E) All drains must be closed
D) Condensate must be removed from the system
The operation of a mechanical steam trap depends on the:
A) Liquid level in the stream trap
B) Liquid level in the condensate tank
C) Difference in specific gravity between the steam and condensate
D) Difference in pressure between the steam and
condensate
E) Difference in temperature between the steam and condensate
A) Liquid level in the stream trap
The purpose of a steam trap is to:
A) Remove condensation from steam lines without allowing steam to pass
B) Remove steam from a steam line without allowing water to pass
C) Reduce high, pressure steam to a lower pressure
D) Collect steam for storage purposes
E) Prevent sludge compounds from entering the steam line
A) Remove condensation from steam lines without allowing steam to pass
In order to reduce the effect of water hammer on pump discharge and suction lines, these lines are often equipped with:
A) Air chambers B) Strainers C) Corrugated expansion joints D) Globe valves E) Stress in pipe hangers
A) Air chambers
A disadvantage of a ball float steam trap is that it:
A) Must be bypassed on start up
B) Does not handle air well
C) Is greatly affected by changes in steam pressure
D) Only operates well under high condensate loads
E) Is vulnerable to damage from water hammer
E) Is vulnerable to damage from water hammer
