4B POWER ENGINEERING ACTUAL
SCRIPT WITH 100 PERCENT CORRECT
ANSWERS
◉ After starting a boilers, what should occur with the fuel system?
Answer: A secondary walk down inspection
◉ Test levers on safety valves should not be used until the boiler
pressure is at least at a minimum of ______ or more of the safety
valves normal popping pressure?
Answer: 75%
◉ When replacing or removing an anti-friction ball bearing,
applied force?
Answer: Should not be transmitted through the ball bearings
◉ The groove that is cut at the top half in the lining of a shell
bearing should not extent closer to the ends than?
Answer: 1.25cm
◉ Why is a safety valves accumulation test performed?
Answer: To verify the safety valves capacity
◉ What do settling ponds use for filtration?
,Answer: Gravity
◉ What are filters used for?
Answer: External water treatment
◉ What is low fuel oil temp cut off?
Answer: A pre-ignition interlock
◉ How are boilers that are usually on standby layed up?
Answer: Wet lay up
◉ What can control corrosion in return lines?
Answer: Feeding amines
◉ What are 3 categories of air conditioning systems?
Answer: 1. Central
2. Combines
3. Unitary
◉ In a high pressure horizontal fire tube steam boiler, where
should the bottom of the sight glass be above the lowest
permissible water level?
Answer: 50mm
,◉ What factor does not affect human comfort?
Answer: Air Density
◉ Where are open expansion tanks installed in the system?
Answer: At the highest point in the system
◉ What are viscous filters effective in removing?
Answer: Dust and pollens
◉ The dial on the face of an altitude gauge should be ____ times the
safety relief valves set pressure?
Answer: 1.5 to 3.5 times
◉ What is the purpose of the test connection on a boiler pressure
gauge?
Answer: To tie on the boiler inspectors pressure gauge
◉ What happens when using grease with anti-friction bearings?
Answer: The bearings will need to be cleaned less often
◉ How is corrosion reduction achieved in a bearing?
Answer: By having the oil film the surface
, ◉ Feedwater piping for all boilers have a check valve and stop
valve, where is the stop valve located?
Answer: In between the check valve and boiler
◉ What must occur before putting the boiler pressure gauge
siphon into service?
Answer: It must be filled with distilled water
◉ What should the operating cut off for Lo pressure heating
boilers?
Answer: 70 KPA
◉ On boilers with fully modulating burner controls, what control
is the startup low fire?
Answer: Manual control
◉ What does a successful combustion safeguard test prove?
Answer: That the BMS can detect the pilot and main flame
◉ How can the pressure ratio of a refrigeration compressor be
calculated?
Answer: By dividing the absolute discharge pressure by the
absolute inlet pressure
◉ What is the function of a condenser?
SCRIPT WITH 100 PERCENT CORRECT
ANSWERS
◉ After starting a boilers, what should occur with the fuel system?
Answer: A secondary walk down inspection
◉ Test levers on safety valves should not be used until the boiler
pressure is at least at a minimum of ______ or more of the safety
valves normal popping pressure?
Answer: 75%
◉ When replacing or removing an anti-friction ball bearing,
applied force?
Answer: Should not be transmitted through the ball bearings
◉ The groove that is cut at the top half in the lining of a shell
bearing should not extent closer to the ends than?
Answer: 1.25cm
◉ Why is a safety valves accumulation test performed?
Answer: To verify the safety valves capacity
◉ What do settling ponds use for filtration?
,Answer: Gravity
◉ What are filters used for?
Answer: External water treatment
◉ What is low fuel oil temp cut off?
Answer: A pre-ignition interlock
◉ How are boilers that are usually on standby layed up?
Answer: Wet lay up
◉ What can control corrosion in return lines?
Answer: Feeding amines
◉ What are 3 categories of air conditioning systems?
Answer: 1. Central
2. Combines
3. Unitary
◉ In a high pressure horizontal fire tube steam boiler, where
should the bottom of the sight glass be above the lowest
permissible water level?
Answer: 50mm
,◉ What factor does not affect human comfort?
Answer: Air Density
◉ Where are open expansion tanks installed in the system?
Answer: At the highest point in the system
◉ What are viscous filters effective in removing?
Answer: Dust and pollens
◉ The dial on the face of an altitude gauge should be ____ times the
safety relief valves set pressure?
Answer: 1.5 to 3.5 times
◉ What is the purpose of the test connection on a boiler pressure
gauge?
Answer: To tie on the boiler inspectors pressure gauge
◉ What happens when using grease with anti-friction bearings?
Answer: The bearings will need to be cleaned less often
◉ How is corrosion reduction achieved in a bearing?
Answer: By having the oil film the surface
, ◉ Feedwater piping for all boilers have a check valve and stop
valve, where is the stop valve located?
Answer: In between the check valve and boiler
◉ What must occur before putting the boiler pressure gauge
siphon into service?
Answer: It must be filled with distilled water
◉ What should the operating cut off for Lo pressure heating
boilers?
Answer: 70 KPA
◉ On boilers with fully modulating burner controls, what control
is the startup low fire?
Answer: Manual control
◉ What does a successful combustion safeguard test prove?
Answer: That the BMS can detect the pilot and main flame
◉ How can the pressure ratio of a refrigeration compressor be
calculated?
Answer: By dividing the absolute discharge pressure by the
absolute inlet pressure
◉ What is the function of a condenser?
