1. Which of the following valves is not compatible with a process known as “pigging”?
a. butterfly
b. gate
c. ball
d. all are compatible
2. Which of the following valve should not be used for throttling?
a. butterfly
b. gate
c. ball
d. plug
3. Which backflow device provides the most protection?
a. double check
b. reduced pressure
c. vacuum breaker
d. all are equal
4. Which valve is used to prime a groundwater well pump?
a. butterfly
b. gate
c. ball
d. foot
5. Which of the following valves would be considered a “closing down” type?
a. gate
b. globe
c. butterfly
d. both a and b
