Chapter 17 Steam Traps Flashcards
1.The ball float trap has the disadvantage of being vulnerable to damage from:
A. Water hammer
B. High steam pressure
C. High steam temperature
D. Air
E. High condensate temperature
A. Water hammer
- In a bimetal steam trap, _____ are welded together.
A. Strips of tin
B. Strips of copper
C. Dissimilar metals
D. High temperature strips of plastic
E. Strips of iron and constantan
C. Dissimilar metals
- As the condensate passes through the trap, the _____ of the bimetal strip increases slightly causing a deflection of the bimetal strip so that the valve can modulate the condensate flow through the trap.
A. Pressure
B. Velocity
C. Density
D. Temperature
E. Specific gravity
D. Temperature
- The air present in steam lines and equipment must also be removed to prevent:
Corrosion from oxygen
A. Pitting from carbon dioxide
B. Rusting from carbon dioxide
C. Rusting from oxygen
D. Caustic embrittlement
E. Pitting from oxygen
E. Pitting from oxygen
- To reduce the effect of water hammer, the suction and discharge lines of pumps are often equipped with:
A. Check valves
B. Relief valves
C. Air chambers
D. All of the above
E. None of the above
D. All of the above
- In the design of a mechanical trap a/an _____ is used to open and close the trap outlet valve.
A. Bi-metallic strip
B. Temperature difference
C. Pressure difference
D. Bellows
E. Inverted bucket
E. Inverted bucket
- The air present in steam lines and equipment must also be removed to prevent:
A. Corrosion from oxygen
B. Pitting from carbon dioxide
C. Rusting from carbon dioxide
D. Caustic embrittlement
E. Corrosion from carbon dioxide
E. Corrosion from carbon dioxide
- The purpose of the steam trap is to discharge _____ from steam lines and equipment without permitting steam to escape.
A. Water and condensate
B. Water and air
C. Condensate and air
D. Air and steam
E. Steam and condensate
A. Water and condensate
- Water hammer can be described as a series of hammer-blow shocks caused by a sudden change in _____ flowing within a pipeline.
A. Velocity of steam
B. Pressure of water
C. Velocity of water
D. Temperature of water
E. Pressure of steam
C. Velocity of water
- The operation of the thermostatic trap depends upon the difference in:
A. Temperature between the steam and the air
B. Temperature between the steam and the condensate
C. Pressure between the steam and the condensate
D. Pressure between the steam and the air
E. Density between the steam and the condensate
B. Temperature between the steam and the condensate
- Using a _____ valve in the bypass line makes it possible to rid the system of condensate by hand throttling while the trap is out of service.
A. Butterfly
B. Gate
C. Needle
D. Ball
E. Globe
E. Globe
- Always install a _____ just ahead of the trap to prevent the entry of foreign matter.
A. Union
B. Strainer
C. Gate valve
D. Tee fitting
E. Globe valve
B. Strainer
- One of the different general classes of traps according to their principle of operation is the _____ trap.
A. Mechanical
B. Electronic
C. Electrical
D. Hydraulic
E. Pneumatic
A. Mechanical
- One of the different general classes of traps according to their principle of operation is the _____ trap.
A. Electronic
B. Electrical
C. Thermodynamic
D. Hydraulic
E. Pneumatic
C. Thermodynamic
- One of the different general classes of traps according to their principle of operation is the _____ trap.
A. Electronic
B. Thermostatic
C. Electrical
D. Hydraulic
E. Pneumatic
B. Thermostatic
