The try lever test should not be used on low pressure boilers unless pressure is at least
A. 33 kPa
B. 36 kPa
C. 35 kPa
D. 32 kPa
E. 31 kPa
Answer: C
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Power Engineering Chapter 59
- If a boiler has more than 500ft of water heating surface and power input more than 1100 kw how many relief valves are required?
- How many relief valves a boiler should have?
- Which code provides recommendations for the testing, operation and maintenance of safety valves?
- Temperature relief device opens when water temperature rises to about
- Which one is NOT a cause for a relief valve in a heating boiler that is opening or spilling?
- Who can repair a safety valve?
- When should the pop test be performed?
- The main advantage of the torsion bar safety valve is
- Torsion bar safety valve is designed for use on boilers operating at?
- Superheater safety valves has a exposed spring because?
- Cast-iron safety valve is are not used on what?
- Cast-iron safety valve is suitable for pressures up to?
- The safety valve popping pressure may be increased or decreased by a maximum of?
- A wire seal on a safety valve is installed by
- Which code states that "Pressure relief valves shall be designed and constructed without chattering"
- The difference between the pressure at which the valve opens and closes is called?
- The pop chamber is provided with what that allows steam to escape from under the skirt?
- Another name for the pop chamber is?
- Another name for the lip on a safety valve is?
- The pop valve is provided with ___ which becomes filled with steam when the valve starts to open.
- If the safety valve is open and there is no pressure in the boiler, what will happen?
- When the safety valve has been set by the adjusting nut a ___ is put in place.
- The adjusting nut on a safety valve is prevented from shifting after adjustment by?
- The valve disc on a safety valve is held firmly on its seat by the pressure of the?