Which backflow prevention method is considered the most efficient and most reliable?
a. air gap
b. double-check valve assembly
c. pressure-type vacuum breaker
d. atmospheric-type vacuum breaker
ANSWER: a
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An air compressor is operating at its maximum practical capacity when it runs for 7 out of every 10 minutes. This is referred to as a 70% ____________________.
Fill in the blank(s) with the appropriate word(s).
What was the significance of Joan of Arc’s career?
a. It demonstrated that the English could not hold France. b. Her actions ended the Hundred Years’ War. c. It speaks to the emergence of a deeply patriotic and royalist sentiment in France. d. It demonstrated that Charles VII was divinely ordained to rule France.
In a series loop system:
A) Only part of the water flows through each convector in the loop. B) Each convector is supplied with the same temperature hot water. C) All the water flows through each convector in the loop. D) The amount of water flowing through each individual convector is controlled by a thermostat.
Technician Asays that an ammeter should be connected in parallel to the circuit being tested. Technician B says that an ammeter is used to measure current flow. Who is correct??
A. ?Technician A only B. ?Technician B only C. ?Both A and B D. ?Neither A nor B