Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
What valve acts as a safety first valve to prevent a backflow of steam? |
Stop and check valve |
|
|
On a watertube boiler, the feedwater line is installed in the steam drum at: |
Slightly below the NOWL |
|
|
The water level in the boiler is controlled by a : |
Continuity probe |
|
|
The max size of a blowoff line is: |
2 1/2" |
|
|
The min size for a water column connection from the boiler is: |
1" |
|
|
The item or trim that does not require a pressure gauge is the: |
Gauge glass |
|
|
Safety valves shall be located on the: |
Reheaters |
|
|
On a firetube boiler, the burner section is located in the: |
Furnace |
|
|
A retractable sootblower on a watertube boiler is found at: |
Furnace area |
|
|
Which 2 codes are addressed when connecting test flanges? |
ASME section 1 B 31.1 |
|
|
What is the minimum size of the boiler feedwater line for a boiler over 100ft²? |
3/4" |
|
|
What is the difference between a safety valve and a safety relief valve? |
A safety valve is used on the vapor system space (steam) and a safety relief valve is used on the liquid system space (water) |
|
|
What is the min and max graduation on a pressure gauge for a 100psig power boiler? |
Min 0 - 150psig Max 0 - 200psig |
|
|
Water columns designed for a 300psig steam boiler will be made of what materials? |
Ductile iron or steel |
|
|
What are the 3 main steps to troubleshooting? |
Diagnosis of symptoms Probable cause of malfunction Corrective action |
|
|
What grade does a steam main have? |
1" over 20' |
|
|
Boilers having over 500ft² of water heating service must have how many means of feeding water? |
2 |
|
|
What is the minimum size for blowoff piping? |
1" for 100 ft² 3/4" for less than 100 ft² |
|
|
What is the max size for blowoff piping? |
2.5" |
|
|
What is the minimum size drain piping for high temp water boilers? |
1" |
|
|
What is the min size piping for a water column? |
1" |
|
|
What are the 4 areas of boiler teim for a firetube boiler? |
Furnace side Products of combustion Water side Steam side |
|
|
What is considered the first pass of the boiler? |
The furnace |
|
|
What is breeching? |
When all the products of combustion are allowed outside the boiler and become flue gas |
|
|
What trim is associated with the furnace area? |
Fuel valve Burner assembly Air control dampers Intake assemblies |
|
|
What trim is included in the water side area? |
Full length shell The furnace Fire tubes NOWL |
|
|
What is the min size for blowdown piping? |
3/4" |
