27.
What term represents the minimum air velocity required to cause the
contaminated air to flow into an enclosure?
a. Capture velocity.
b. Static pressure.
c.
Duct velocity
d. Face velocity.
28.
When using the local exhaust system, this term maintains air velocity, exists only
when air is in motion, acts in the direction of the flow, and is always positive.
What is this term?
a. Capture velocity.
b. Velocity pressure.
c.
Static pressure.
d. Total pressure.
29.
When using the local exhaust system, this pressure term is required to start and
maintain air flow. What is the term?
a. Velocity pressure.
b. Static pressure.
c.
Inner pressure.
d. Total pressure.
MD0165
4-32