Reading...
Play button
Play button
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;
11 Cards in this Set
- Front
- Back
|
3 types of heat transfer
|
-conduction-heat passes through a material
-convection-heat transfer in fluids -radiation- heat travels in electromagnetic waves |
|
|
The "hot well" is...
|
the space at the bottom of the condenser below the tubes
|
|
|
atmospheric pressure at sea level is...
|
14.7 pounds per square inch absolute or 0 pounds per square inch
|
|
|
When throttling gate valves in the circulating water, keep valves at least...
|
1/4 open
|
|
|
An open condenser is...
|
a confined space
|
|
|
Never use_____for cleaning condenser tubes
|
abrasive or metal tools or wire brushes
|
|
|
Methods to remove soft fouling
|
-High pressure water jet
-non-metalic brushes (nylon) or plugs |
|
|
Galvanic corrision
|
dissimilar metals joined together and immersed in an electrolyte (seawater). current flows from one metal to the other through the fluid
|
|
|
Replace zincs when they....
|
are half corroded
|
|
|
Dezincification is...
|
when heated saltwater on brass tubes causes particles to cling to tube surfaces and perforate the wall
|
|
|
Replace plugged tubes whenever...
|
total number if plugged tubes reaches 10%
|
