Chapter 4 Flashcards
Quiz 4
The relieving capacity of a steam boiler safety valve is measured in:
lbs/hr that it is discharging
When the heat energy in steam is lost, what happens to it?
it is reclaimed as condensate
A vent valve should be opened up when:
Both warming up and shutting down the boiler
A leaking safety valve can be plugged to avoid wasting water until it is repaired.
False
A safety relief valve is considered the most important fitting.
True
The modulating pressure control device on regular heating boiler must:
control the boiler’s high or low fire
What is the primary purpose of a “pressure relief device”?
Primary purpose is to maintain the system integrity
In what unit of measurement are steam pressure gauges calibrated?
pounds per square inch
A safety valve on a low pressure steam boiler may be rated at 30 psig.
False
Why are some steam heating boiler systems designed to operate under a vacuum?
to utilize steam with a temperature below 212°F
Which of the following describes the function of a safety valve?
Provide overpressure protection to limit the internal pressure in vessels
The purpose of the boiler modulating pressure control is to:
regulate the high and low firing rates of the burner
The maximum setting allowed on a low pressure steam boiler safety valve is 15 psi.
True
The following is used to perform a steam boiler function test.
Safety Valve
If carryover is dangerous what could it lead to:
Water Hammer
