Which of the following statement(s) is (are) true about cylinder valves?
1. Diaphragm valves can withstand pressure greater than 1500 psig.
2. Direct-acting valves are used for pressure less than 1500 psig.
3. Diaphragm valves should be used with flammable gases.
4. Leakage cannot occur with direct-acting valves.
a. 3 c. 2 and 3
b. 1 d. 1 and 4
ANS: A
Diaphragm valves can withstand pressures less than 1500 psig and should be used with flamma-ble gases because they do not allow leaks. A direct-acting valve contains two washers and a Tef-lon packing to prevent gas leakage around the threads.
You might also like to view...
Which of the following goes in blank #2?
What will be an ideal response?
Name four vital signs of the body.
What will be an ideal response?
Dental plaque is an established primary factor for the periodontal diseases
Indicate whether the statement is true or false
The procedures that ensure that services provided in the medical practice meet or exceed the requirements and standards are _______ procedures.
Fill in the blank(s) with the appropriate word(s).