A pump that has a seal between the fluid inlet and outlet to prevent backflow through the pump is a _____
pump.
a. high-capacity
b. positive-displacement
c. constant-displacement
d. nonpositive-displacement
b
You might also like to view...
Which of the following statements about camelids is correct?
a. They cannot extract protein and carbohydrates from poor quality food. b. Camelids are more prone to bloat than cattle are. c. They are true ruminants. d. Camelids have a three-chambered stomach.
Five mutually exclusive cost alternatives that have infinite lives are under consideration for decreasing the fruit-bruising rates of a thin skin-fruit grading and packing operation (peaches, pears, apricots, etc.). The initial costs and cash flows of each alternative are available. If the MARR is 15% per year, the one alternative to select is:
Rank Alternatives: C, A, B. D, E; perform incremental ROR analysis for n = ? A vs. C: -2000(?i*) + 400 = 0; ?i* = 400/2000 = 20% > MARR; eliminate C B vs. A: -1000(?i*) + 100 = 0; ?i* = 100/1000 = 10% < MARR; eliminate B D vs. A: -3000(?i*) + 300 = 0; ?i* = 300/3000 = 10% < MARR; eliminate D E vs. A: -4,000(?i*) + 700 = 0; ?i* = 700/4000 = 17.5% > MARR; eliminate A Select E
The topmost horizon in most humid region forest soils is the A horizon
Indicate whether the statement is true or false
The switching valves on the AIR pump have failed several times. Technician A says that a defective exhaust check valve could be the cause. Technician B says that a leaking exhaust system at the muffler could be the cause. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician