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;
10 Cards in this Set
- Front
- Back
|
Which of the following safety precaution(s) should you observe prior to making any piping repairs? A. Make sure all piping systems are tagged-out and isolated B. Ensure all piping systems are depressurized and drained before you cut into the pipe or disconnect a joint C. Ensure all flammable and toxic fluid or gas piping systems are gas-free prior to working on them D. All of the above |
All of the above |
|
|
When installing a welded pipe joint, you must leave a 1/16- to 1/8-inch bottoming clearance between the fitting and the pipe end. What purpose does this gap serve? A. It prevents corrosion of the pipe end B. It allows for thermal expansion of the pipe end C. It allows for pipe contraction D. It prevents excess fluid turbulence |
It allows for thermal expansion of the pipe end |
|
|
When constructing a target, you should weld it what minimum distance off the target deck? A. 6 inches B. 9 inches C. 12 inches D. 18 inches |
9 inches |
|
|
Steel, aluminum, or copper-nickel piping should NOT be bent to a radius less than how many times the diameter of the pipe? A. 2 times B. 4½ times C. 6½ times D. 7 times |
2 times |
|
|
What could happen if you work with a section of pipe too short for the portable pipe bender? A. The pipe ends could flatten B. The pipe throat could wrinkle C. The angle gauge could give false readings D. The pipe could slip off the pivot shoes |
The pipe could slip off the pivot shoes |
|
|
You are using a mandrel to bend a section of pipe on the rotary pipe bender. What purpose does the mandrel serve?
A. It decreases the radius of bend B. It increases the bending capacity of the machine C. It supports the pipe wall D. It prevents back wall thinning |
It supports back wall thinning |
|
|
When using a mandrel to bend pipe, what type of lubricant should you use? A. Petroleum-based B. Lanolin-based C. Glycerin-based D. Graphite-based |
Lanolin-based |
|
|
Why should you set the automatic stop a few degrees greater than the desired bend angle? A. To allow for spring-back in the pipe B. To allow for pipe slippage C. To verify accuracy of the bend angle D. To allow for back bending |
To allow for spring-back in the pipe |
|
|
When a valve is installed in its most desirable position, the valve stem should point in what direction? A. Midway between straight down and vertical B. Horizontal C. Straight up D. Straight down |
Straight up |
|
|
Moistened insulating material will produce which of the following results? A. Heat losses B. Reduces the effectiveness of the material C. May cause long-term disintegration D. Both B and C above |
B and C above |
