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Level 3 Domestic Plumbing and heating course revision > Phase 1 Assessment > Flashcards

Phase 1 Assessment Flashcards

1
Q

What colour is a 230 volt domestic power supply?

A

Blue

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2
Q

What colour is a 110 volt safe site power supply?

A

Yellow

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3
Q

How do you check power tools are safe to use?

A
  • Check for PAT testing
  • Check guards,blades and batteries
  • Isolate before changing parts
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4
Q

What is the melting point of copper?

A

1083 degrees

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5
Q

What are the 3 grades of copper?

A

R220- Soft
R250- half hard mainly used in the uk
R290- thin walled hard copper

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6
Q

What are the 4 colours of wrapped copper and their uses?

A

Blue- wholesome
Green- rainwater
White- central heating
Yellow- natural gas

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7
Q

What are the 3 colours of LCS and their weight?

A

Light- Brown
Medium-Blue
Heavy-Red

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8
Q

What is the usage of MDPE?

A

Medium-density polyethylene- Large blue pipe that carries medium density water from the mains

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9
Q

What are the positives of Polybutylene?

A

Flexible and easily installed, low noise pollution and low thermal expansion

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10
Q

What does PVCu mean and what is it used for?

A

Unplasticised polyvinyl chloride- guttering and downpipes

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11
Q

What is polypropylene used for?

A

Cold water cisterns, WC siphons, pushfit waste and overflow pipe

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12
Q

What is Modified unplasticised polyvinyl chloride used for?

A

Solvent welded waste and overflow pipes

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13
Q

What is ABS pipe and what is it used for?

A

Acrylonitrite butodione- internal soil stacks,lead pipe

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14
Q

Where can you notch a joist on a timber?

A

Between 7% and 25% of the length of the joist

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15
Q

What are the restrictions on drilling holes in joists?

A
  • Can’t be more than 25% of the span
  • Mustn’t go further down than 40% of the span
  • Next hole must be 3x the distance away from the last
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16
Q

What are the regulations for installations inside buildings conveying water for human consumption?

A

BS EN 806

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17
Q

What is the BS 8558 regulation about?

A

Guide to design & installation of water for domestic use

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18
Q

What are the clipping distances for 15mm copper?

A

Horizontal- 1.2m

Vertical- 1.8m

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19
Q

What are the clipping distances for 22mm and 28mm copper?

A

Horizontal- 1.8m

Vertical- 2.4

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20
Q

What are the clipping distances for 1/2” LCS?

A

Horizontal- 1.8m

Vertical- 2.4m

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21
Q

What are the clipping distances for 3/4” and 1”LCS?

A

Horizontal- 2.4m

Vertical- 3m

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22
Q

What are the clipping distances for Plastic Pressure Pipe?

A

Horizontal Vertical
15mm 0.3m 0.5m
22mm 0.5m 0.8m
28mm 0.8m 1m

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23
Q

What does Intumescent mean?

A

Fire retardent/resistant

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24
Q

What is the PH for soft and hard water?

A

Soft- less than 6.5

Hard- Higher than 8.5

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25
Q

What are the 5 fluid categories and an example of each?

A 
1- Potable drinking water
2- Hot water
3-Slightly hazardous- bathwater
4-Significant health risk- heating system
5- Serious health risk- toilet waste
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26
Q

What are the 5 categories that the Water supply fittings regulations 1999 target?

A

Waste,misuse,undue consumption,contamination and erroneous measurement

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27
Q

What does the service pipe do?

A

Carries water from the exterior stop cock to the internal stop cock

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28
Q

What does the communication pipe do?

A

Carries water from the water mains to the water meter

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29
Q

What is the miniumum and maximum depth for the service pipe?

A

Min- 750mm

Max- 1350mm

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30
Q

What are the duties of the Architect?

A

Liaise with the client, design projects and manages the overview

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31
Q

What are the duties of the Clerk of works?

A

Make sure that it is being built to the drawings. If not they sign a variation order

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32
Q

What are the duties of the Structural engineer?

A

Calculate loads, forces and variances from wind & rain

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33
Q

What are the duties of the Building services engineer?

A

Overview and manage the internal building of the house

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34
Q

What are the duties of the Quantity surveyor?

A

Calculate the materials and labour required by putting together a bill of quantities

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35
Q

What is building regulations part H about?

A

Drainage and waste disposal

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36
Q

What is building regulations part A about?

A

Structure

37
Q

What is building regulations part F about?

A

Ventilation

38
Q

What is building regulations part G about?

A

Sanitation, hot water safety and efficiency

39
Q

What is building regulations part J about?

A

Combustion appliances

40
Q

What is building regulations part L about?

A

Conservation of fuel and power

41
Q

What is building regulations part P about?

A

Electrical safety

42
Q

What are the 4 categories in building regs part L?

A

L1A: New dwellings
L1B: Old dwellings
L2A: New buildings
L2B: Old buildings

43
Q

What are the 3 information sources for a central heating system?

A
  • SAP (standard assessment procedure)
  • CHESS (central heating efficiency system specification)
  • HHIC (heating and hot water industry council)
44
Q

What are the 6 protected characteristics of the Equality act?

A
  • Age
  • Gender
  • Disability
  • Race
  • Marital status
  • Being pregnant
45
Q

What are the 5 stages of a risk assessment?

A 
1- Identify the hazard
2- Decide who might be harmed
3- Evaluate risks and choose precautions
4- Record and implement findings
5- Review your assessment and update
46
Q

What is the maximum flush of a modern toilet?

A

6 litres

47
Q

What do all immersion heaters require?

A

Cut out device

48
Q

What is a heat only boiler?

A

Only contains a heat exchanger and only has flow & return pipes

49
Q

What is a direct cylinder?

A

Has no coil as it’s powered by an immersion heater

50
Q

What is an indirect heater?

A

Contains a coil and a double feed

51
Q

What is an open vented combination unit?

A

The cold water storage cistern and cylinder are connected

52
Q

What are the safety devices for an unvented cylinder?

A

1- Thermostat
2-High temperature stat
3-Temperature relief valve

53
Q

What are the two types of radiator valves and their uses?

A

TRV- controls the temperature

Lockshield valve- controls flow

54
Q

What are the positives and negatives if a one pipe gravity system?

A

+ Cheap to install

  • inefficient
  • Each rad progressively cools down
  • Boiler could overheat
  • Uncontrolled room temperature
55
Q

What are the positives of a Two pipe semi gravity system?

A
  • All radiators reach the same temperature
  • More efficient
  • Cheap to run
56
Q

What are the negatives of a Two pipe semi gravity system?

A
  • Limited heat control
  • boiler cycling
  • not compliant with building regs
  • boilers are low efficiency
57
Q

What are the positives of a C-plan two-pipe semi gravity system?

A
  • All rads reach the same temperature
  • Quicker to heat up
  • Full control on heating and hot water
58
Q

What are the negatives of a C-plan two-pipe semi gravity system?

A
  • Not fully pumped
  • Low efficiency
  • Can’t fully isolate system
59
Q

What are the positives for a two-pipe semi gravity with a heat sink?

A
  • Bathroom is always hot

- Compliant with building regs

60
Q

What are the negatives for a two-pipe semi gravity with a heat sink?

A
  • restricted heat control
  • only on open vented systems
  • expensive and inefficient
61
Q

What makes a Y plan heating system?

A
  • Three port mid position valve controls the flow of water
  • Controlled by room stat and cylinder stat
  • Has automatic bypass connecting flow and return
62
Q

What makes an S plan heating system?

A
  • Has zone valves that control the flow of water
  • Controlled by room stat and cylinder stat
  • Has automatic bypass connecting flow and return
63
Q

What does a boiler interlock do?

A

Tells the boiler it needs to shut off

64
Q

What is district heating?

A

It’s a centralised boiler that provides heat to a number of properties

65
Q

What can rainwater cause?

A
  • Penetration to buildings

- affect foundations

66
Q

What are the 5 systems of rainwater discharge?

A
  • Surface water drain
  • Combined sewer
  • Watercourse
  • Soakaway
  • Rainwater harvesting system
67
Q

What are the 4 rainwater intensity categories?

A

1- Eaves,gutters and flat roofs
2- Valley and parapet gutters
3- Valley and parapet gutters for high risk buildings
4- High risk buildings

68
Q

What should the fall on guttering be per metre?

A

1-3mm

69
Q

What are the 4 types of sanitation systems?

A
  • Primary ventilated stack
  • Ventilated branch discharge
  • Secondary ventilated stack
  • Stub stack
70
Q

What are the requirements of a primary vent stack?

A
  • Needs a P trap
  • Gradient should be 2.5 degrees on bends
  • Must have a long radius bend at the bottom
71
Q

What are the requirements for a secondary ventilated stack?

A
  • Minimum diameter is 25mm unless it’s longer than 15m (32mm)
  • 5 storeys is 100mm diameter and above 20 storeys is 150mm
72
Q

What are the requirements for a stub stack?

A
  • Vent must be 2m above the highest appliance
  • Air admittance valve should be fitted
  • Branch pipe musn’t be within 200mm of another connection
73
Q

What is the equation for weight?

A

Mass x gravity

74
Q

What is the equation for density?

A

Mass/ volume

75
Q

What will happen to an object if it’s density is higher than 1?

A

Sinks

76
Q

What is sensible heat?

A

Energy required to change temperature

77
Q

What is latent heat?

A

The energy required to change state

78
Q

What are the 6 principle gases?

A
  • Air
  • Steam
  • Natural gas
  • LPG
  • CO2
  • Refrigeration gases
79
Q

What is 1 Bar in KPa?

A

100 KPa

80
Q

What is charles law?

A

A volume of gas held at a constant pressure is directly proportional to the temperature

81
Q

What is Boyle’ law?

A

Volume of gas at a constant temperature is inversely proportional to the pressure

82
Q

What type of water do Sulfates create?

A

permanently hard water

83
Q

How do you calculate mechanical advantage?

A

Load/effort

84
Q

What type of water do Carbonates create?

A

Temporarily hard water

85
Q

What is significant about the 1st class lever?

A

The long arm is proportional to the short arm

86
Q

What is significant about the 2nd class lever?

A

Force and the load are on the same side of the pivot

87
Q

What is significant about the 3rd class lever?

A

Load is at the opposite end to the force

88
Q

What is the equation for the velocity ratio?

A

Distance moved by effort/ distance moved by load

89
Q

Equation for moment?

A

force x distance

Level 3 Domestic Plumbing and heating course revision (5 decks)

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