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;
60 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
less than 2% of coating surface peeling is considered? |
Excellent |
|
|
|
Less than 5% is considered? |
Good |
|
|
|
Less than 10% is considered? |
Fair |
|
|
|
More than 10% is considered? |
Poor |
|
|
|
How often are contam and sump tanks inspected? |
Every 3 years +\- 12 |
|
|
|
How often are service tanks inspected? |
Every 8 years +/- 12 mos |
|
|
|
How often are storage tanks inspected? |
10 years +\- 12 |
|
|
|
What has internal threads that mate with the stem threads and causes handwheel to move up or down? |
Yoke Sleeve |
|
|
|
What maintains a fluid tight seal between the bonnet and the stem? |
Packing |
|
|
|
What holds packing in place |
Packing Flange/Gland |
|
|
|
What supports the stuffing box and the stem? |
Bonnet |
|
|
|
What provides a passage for fluid flow? |
(Valve) Body |
|
|
|
What is machined to the valve body and forms a metal to metal tight seal when gate is lowered? |
Seats |
|
|
|
what is raised or lowered to open and close valves? |
Gate |
|
|
|
what is used to keep valve gatw aligned with seats? |
Guide Ribs |
|
|
|
What compresses packing to make a fluid tight seal and still permit stem to turn easily? |
packing gland |
|
|
|
what works with the seat to control flow? |
disc |
|
|
|
globe valves are designed so that fluid will enter ____ the bridgewall |
below |
|
|
|
What is cast into the body of a valve to direct fluid flow and support the seat? |
Bridgewall |
|
|
|
what ensures positive shutoff on butterfly valves and self compensates for wear? |
flexible lip seal |
|
|
|
how is the shaft bearing lubricated? |
Self lubricated |
|
|
|
What opens on fluid flow and closes on REVERSE/ no flow?(one way check valve) |
Disc |
|
|
|
in a check valve, what supports the disc and is held by a hinge pin? |
Arm |
|
|
|
on a check valve, what has internal threads that screw into the valve body? |
Hinge pin |
|
|
|
what prevents the disc from jamming in the open position by stopping the arm? |
Angle Plug |
|
|
|
in LT valves, what operates the unit electrically? |
Drive Motor |
|
|
|
what engages the handwheel with the handwheel shaft during manual operation? |
Handwheel clutch mechanism |
|
|
|
what connects the handwheel to the drive sleeve and disengages the motor during manual operation? |
Handwheel shaft |
|
|
|
what actuates the traveling nuts? |
the drive sleeve |
|
|
|
what activates torque switches during motor operation? |
torque actuating shaft |
|
|
|
what provides a predetermined amount of torque when seating, or if valve is obstructed will stop motor? |
Bellville Springs |
|
|
|
stops drive motor when valves is properly seated or if an overload occurs |
Torque Switches |
|
|
|
what activates upper and lower limit switches? |
Traveling nuts |
|
|
|
What allows motor to run in either direction? |
Reversing Starter |
|
|
|
What de energizes drive motor at a preset overcurrent and then must be manually reset? |
Overload relay |
|
|
|
What is used to perform all system functions on control console? |
Trackball |
|
|
|
What is used to communicate to all other control console systems? |
Keyboard |
|
|
|
The radar head outputs __ to __ mA signal proportional to the level in the tank |
4 to 20 |
|
|
|
4 mA reprsents a ____ tank |
empty |
|
|
|
20 mA represents a ___ tank |
Full |
|
|
|
Aux pumps are rated at___ GPM at ___ psi |
50 gpm; 100 psi |
|
|
|
What acts as a working area for the rotor assembly? |
Cylinder |
|
|
|
What prevents leakage between head and cylinder |
O-ring |
|
|
|
how many bearings are in each head assembly? |
one |
|
|
|
in rotary vane pumps, what does mechanical seal prevent leakage along? |
along the shaft and into the bearings |
|
|
|
what contains the recesses for the vanes and pushrods? |
Rotot and shaft assembly |
|
|
|
speed indicator meshes with ___ to drive speed counter |
worm wheel |
|
|
|
what provides the drive rotation to the spindle? |
wormwheel and drive assembly |
assembly |
|
|
horizontal drive shaft is supported by __ ball bearings? |
2 |
|
|
|
how many sets of ball bearings does the spindle assembly have? |
3 |
|
|
|
which purifier does NOT have a vertical spring? |
300gpm |
|
|
|
what houses rotating BOWL shell assembly? |
Bowl Casing |
|
|
|
what provides a seal between the bowl casing and the bowl cover? |
two o-rings |
|
|
|
the casing drain line is located in what part of the purifier? |
bowl casing |
|
|
|
what prevents leakage out of water discharge chamber? |
o ring |
|
|
|
the seal water inlet is located in what? |
bowl assembly |
|
|
|
in a purifier disc stack, where is #1 located? |
on the bottom of the stack |
|
|
|
what forms a pump casing for the pairing disc? |
Top disc |
|
|
|
dry weight of purifier |
1,612 |
|
|
|
wet weight of purifier |
2,765 |
|
