Relay - ATOM

Question 1

A relay is employed when conditions necessary for an effective stream exceed the performance ability of a ____.

Answer 1

single pumping engine

Question 2

In the hills, differences of elevation might call for a pump every ___ feet.

Answer 2

300

Question 3

Use of hose less than ___ in diameter Is discouraged between pumps of a relay operation because of excessive friction loss.

Answer 3

2-1/2”

Question 4

As closing of lines increases the pressure in the hose, every effort should be made to keep individual pumps in a line to a ___ maximum.

Answer 4

200 pound

Question 5

To overcome a head of 100 feet, a pressure of

___ is necessary regardless of the flow

Answer 5

43.4 pounds

Question 6

Signals

To hold the water

Answer 6

Place hands overhead and wide-spread, with palms toward the person being signalled i n the universal STOP signal.

Question 7

To charge lines or increase pressure

Answer 7

Wave the outstretched arm up and down.

Question 8

To lower pressure

Answer 8

Wave the outstretched arm from side t o side. his signal is also used by operator at source of supply to Indicate that he is unable to increase pressure. )

Question 9

To shut down

Answer 9

Place arms overhead with hands touching, making an inverted “v”.

Question 10

To break down

Answer 10

Same signal as above while already shut down.