Water Relaying

Question 1

Name the two methods of water relay?

Answer 1

Closed Circuit and Open Circuit

Question 2

The pump closest to the water source is known as the …. pump?

Answer 2

Base Pump

Question 3

What is the main aim when organising a water relay?

Answer 3

To deliver the maximum amount of water, with the minimum amount of equipment

Question 4

What are the practical considerations of water relaying?

Answer 4

• The distance between the pumps.
• The pump pressure.
• Size, type and number of hose lines between pumps.
• Contours of the relay route.

Question 5

What are the pumps between the base pump and the delivery pump known as?

Answer 5

Booster Pumps.

Question 6

The efficiency of a water relay depends on?

Answer 6

• The pumps and equipment being in good working order.
• The layout of relay being organised.
• The skill of the operators.

Question 7

What are the FIVE principle laws governing frictional loss?

Answer 7

1. Friction loss varies directly with the length of pipe.
2. For the same velocity, friction loss decreases directly with the increase in diameter.
3. Friction loss increases directly as the square of the velocity.
4. Friction loss increases with the roughness of the interior of the pipe.
5. Friction loss, for all practical purposes, is independent of pressure.

Question 8

State the 5 principle law laws governing frictional loss.

Answer 8

1. Frictional loss varies directly with the length of the pipe.
2. For the same velocity, friction loss decreases with the increase in diameter.
3. Friction loss increases directly as the square of the velocity.
4. Friction loss increases with the toughness of the interior of the pipe.
5. Friction loss, for all practical purpose, is independent of pressure.