pumps

Question 1

What are 5 Hazards of pumping in open water?

Answer 1

1. Working in isolation 2. Manual Handling 3. Fatigue 4. Limited visibility 5. Steep slippery banks 6. Trip hazards 7. Equipment falling in 8. Changing water conditions 9. Fire 10. Waterborne diseases 11. Blue algae

Question 2

What are the 3 gauges on the pump and what are they used for?

Answer 2

Compound gauge - This is used for Hard suction
Low pressure - Deliveries to the hose.
High Pressure - Hose reels

Question 3

How much pressure would you lose for each length of hose and how much for each meter going up?

Answer 3

0.2 bar per length and 0.1 bar upwards

Question 4

Explain the process for engaging the PTO on the MAN and the Scania

Answer 4

MAN - Handbreak on, make sure its in neutral, then engine on, Select PTO 1 button in the main cab then open tank valve.
Scania - handbreak, neutral, engine on open tank, Press the button on the bottom right corner of the screen located in the back with the pump, the icon will light up once engaged.

Question 5

Name 2 advantages of putting water through tank of appliance?

Answer 5

1. Always reserve supply of water in the tank 2. Have control of the pressure to the branches

Question 6

What does CREST stand for? What does it mean?

Answer 6

Pneumonic for the suction.
C - Creating the flow
R - Resistance 
E - Entry loss at the pump eye
S - Suction and strainers 
T - Temperature

Question 7

Name 2 reasons for water loss when working on pressure fed supply?

Answer 7

Burst length - A car could drive over the length.

Question 8

Name 2 reasons for increase of delivery pressure?

Answer 8

Shutting down branch
Vehicle parked on delivery hose has moved
Kink in delivery hose has been sorted

Question 9

Name 2 ways of supplying water over long distances

Answer 9

HVP
Water ferrying
Water relay

Question 10

What is tuberculation?

Answer 10

Corrosion / build up of rust type stuff in pipes.

Question 11

When should internal strainer be removed from LPP?

Answer 11

When pumping from open water

Question 12

Why do you flush the hydrant?

Answer 12

To remove stone/debris to prevent damaging the equipment.

Question 13

What are the types of positive displacement pump?

Answer 13

stirrup pump. Peristaltic

Question 14

When pumping from open water, the needle goes to zero. What does this indicate?

Answer 14

Couplings may have come loose or the suction has come out the water or water is rising

Question 15

What type of primer is used in the 12 TON and 18 TON appliance?

Answer 15

Reciprocating primer

Question 16

Why do you flush the hydrant twice?

Answer 16

To remove sludge or salt build up

Question 17

Where would you find a water by meter bypass hydrant?

Answer 17

Industrial premise

Question 18

Name and give one advantage of each type of water relay?

Answer 18

Closed circuit - Its quick to get up and running and requires few resources.
Open circuit - A defective pump can be replaced with minimum disturbance to the water supply

Question 19

When should the internal strainer not be removed?

Answer 19

When being fed from a pressure supplied source.

Question 20

If the water tank on the 12T appliance is overfilling what would happen?

Answer 20

IPC error message and the engine revs reduce

Question 21

Which principle is used to prime the LPP?

Answer 21

Venturi

Question 22

How do you calculate cylindrical tanks?

Answer 22

800 x Diameter squared x height

Question 23

How do you calculate a rectangular object with sloping base?

Answer 23

Length x breadth x (h1 + h2) x 1000
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