Basic Concepts Flashcards

1
Q

What role does worksafeBC play?

A

Monitors compliance with occupational health and safety regulations through site visits and inspections

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2
Q

What role does technicalsafetybc play?

A

Gas and electrical permits and inspections. Also responsible for water slide inspections in the province

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3
Q

What role does health.gov.bc play?

A

Responsible for ensuring compliance with the B.C. health act which directs how swimming pools are operated and maintained in bc

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4
Q

What are 3 primary factors affecting quality of swimming pool water?

A

Physical, chemical, and biological

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5
Q

What does physical factor for water quality include?

A

All circulation and filtration components

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6
Q

What does chemical factor of water quality include?

A

Having balanced water to prevent corrosion and scale formation

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7
Q

What water should be used when mixing your chemicals (if possible)

A

Pool water

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8
Q

Do you add water to chemicals when mixing and why?

A

NO! This is dangerous and can cause cause straight chemical splashing out of vessel. Water first then chemical adding.

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9
Q

What is rule of 2’s for chemical mixing?

A

Add half the amount of chemical required and wait at least 2 turnovers to avoid overdosing

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10
Q

What is the maximum kg/500,000L of chemical you should add and why?

A

20kg/500,000L because the water may not absorb all the chemicals if concentration is too high

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11
Q

Why should we deal with 1 chemical problem at a time?

A

A chemical soup can cause more problems and delays than what was originally there

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12
Q

What must be done after every chemical addition and every change to chemical feed?

A

Documentation in appropriate log sheet

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13
Q

How many meters is 1 foot?

A

0.304m = 1foot

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14
Q

How many meters is 1 yard?

A

O.914m = 1 yard

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15
Q

How many meters squared is 1 yard squared?

A

0.836 m squared = 1 yard squared

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16
Q

How many meters cubed is 1 foot cubed?

A

0.028 m cubed = 1 foot cubed

17
Q

How many litres is 1 US gallon?

A

3.785 litres = 1 US gallon

18
Q

How many litres in 1 imperial gallon

A

4.546 litres = 1 imperial gallon

19
Q

How many US gallons in a litre

A

0.264 US gallons = 1 litre

20
Q

How many imperial gallons in 1 litre

A

0.212 imperial gallons = 1 litre

21
Q

How many inches in a meter

A

39.37 = 1 meter

22
Q

How many feet in a meter

A

3.28 feet = 1 meter

23
Q

How many yards in a meter

A

1.09 yards = 1 meter

24
Q

How many centimetres in a meter

A

100 cm = 1 meter

25
Q

How many ppm is 1 milligram per litre

A

1 milligram/litre = 1 ppm

26
Q

How many litres in 1 meter cubed

A

1000 litres = 1 meter cubed

27
Q

How many litres per second is 10 US gallons per minute

A

0.631 l/s = 10 US GPM

28
Q

Explain backwashing in a sand filtration system

A

Backwashing is reversing the flow of the sand filter which causes turbulence in the sand which cleans it and is sent out to waste.

29
Q

What is diatomaceous earth composed of?

A

Tiny fossils that trap particles when used as a filter layer.

30
Q

What is the formula to find volume of pools with sloping bottoms

A

Width * length * ( (depth1 + depth2) /2)

31
Q
A