Questions Flashcards
(27 cards)
Total force on a safty valve is equel to _____
Area times pressure
Evaporation test
A test in which the boiler operator allows the water level in the boiler to drop in order to test the proper operation of the low water fuel cutoff
Safty valve formula
Area times pressure
Area times area
0.7854
Water hammer
Is a banging noise created by water that is carryover with the steam
6 fuel oil btu content
150,000 btu/gal
Pour point
Is the lowest temperature at which fuel oil flow as a liquid
Viscosity
Is the internal resistance of the fuel oil to flow
Flash point
Is the temperature at which the fuel oil gives off vapor that flashes when expose to an open flame
Volatility
Is the ability of the fuel to vaporize
Purpose of the LWFC?
Shut the burner
Two types of fire tube low pressure boiler
Scotch marine
Fire box
3 types of low pressure boiler
Fire tube
Water tube
Cost iron
How many btu in #6 fuel oil??
150,000 btu/gal
What is a BTU?
A BTU is the amount of heat energy required to raise one pounf of water one fâ
Viscosity
The internal resistance of fuel oil to flow
Pour point?
The lowest temperature fuel oil will flow as a liquid
3 types of nonreturn steam traps
Thermostatic
Float thermostatic
Inverted bucket
What is complete combustion?
Complete combustion is burning the fuel using the minimum amount above the theorical amount of air to burn
Define blowback
Is the 2 to 4 psi droping pressure after the safety valve shuts back to the seating position
What a boiler operator should do if he finds no water in the gauge glass?
Secure the burner and feedwater
Most common main steam stop valve?
Gate os&y valve, is durable and you can tell from far if is open or close
Systems to run a boiler
Feedwater
Fuel
Draft
Steam
What is need it to generate steam
Water
Container
Heat
Total force is = to?
Area times pressure
