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

Phase 1 Assessment Flashcards

(89 cards)

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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
What are the 5 fluid categories and an example of each?
``` 1- Potable drinking water 2- Hot water 3-Slightly hazardous- bathwater 4-Significant health risk- heating system 5- Serious health risk- toilet waste ```
26
What are the 5 categories that the Water supply fittings regulations 1999 target?
Waste,misuse,undue consumption,contamination and erroneous measurement
27
What does the service pipe do?
Carries water from the exterior stop cock to the internal stop cock
28
What does the communication pipe do?
Carries water from the water mains to the water meter
29
What is the miniumum and maximum depth for the service pipe?
Min- 750mm | Max- 1350mm
30
What are the duties of the Architect?
Liaise with the client, design projects and manages the overview
31
What are the duties of the Clerk of works?
Make sure that it is being built to the drawings. If not they sign a variation order
32
What are the duties of the Structural engineer?
Calculate loads, forces and variances from wind & rain
33
What are the duties of the Building services engineer?
Overview and manage the internal building of the house
34
What are the duties of the Quantity surveyor?
Calculate the materials and labour required by putting together a bill of quantities
35
What is building regulations part H about?
Drainage and waste disposal
36
What is building regulations part A about?
Structure
37
What is building regulations part F about?
Ventilation
38
What is building regulations part G about?
Sanitation, hot water safety and efficiency
39
What is building regulations part J about?
Combustion appliances
40
What is building regulations part L about?
Conservation of fuel and power
41
What is building regulations part P about?
Electrical safety
42
What are the 4 categories in building regs part L?
L1A: New dwellings L1B: Old dwellings L2A: New buildings L2B: Old buildings
43
What are the 3 information sources for a central heating system?
- SAP (standard assessment procedure) - CHESS (central heating efficiency system specification) - HHIC (heating and hot water industry council)
44
What are the 6 protected characteristics of the Equality act?
- Age - Gender - Disability - Race - Marital status - Being pregnant
45
What are the 5 stages of a risk assessment?
``` 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
What is the maximum flush of a modern toilet?
6 litres
47
What do all immersion heaters require?
Cut out device
48
What is a heat only boiler?
Only contains a heat exchanger and only has flow & return pipes
49
What is a direct cylinder?
Has no coil as it's powered by an immersion heater
50
What is an indirect heater?
Contains a coil and a double feed
51
What is an open vented combination unit?
The cold water storage cistern and cylinder are connected
52
What are the safety devices for an unvented cylinder?
1- Thermostat 2-High temperature stat 3-Temperature relief valve
53
What are the two types of radiator valves and their uses?
TRV- controls the temperature | Lockshield valve- controls flow
54
What are the positives and negatives if a one pipe gravity system?
+ Cheap to install - inefficient - Each rad progressively cools down - Boiler could overheat - Uncontrolled room temperature
55
What are the positives of a Two pipe semi gravity system?
- All radiators reach the same temperature - More efficient - Cheap to run
56
What are the negatives of a Two pipe semi gravity system?
- Limited heat control - boiler cycling - not compliant with building regs - boilers are low efficiency
57
What are the positives of a C-plan two-pipe semi gravity system?
- All rads reach the same temperature - Quicker to heat up - Full control on heating and hot water
58
What are the negatives of a C-plan two-pipe semi gravity system?
- Not fully pumped - Low efficiency - Can't fully isolate system
59
What are the positives for a two-pipe semi gravity with a heat sink?
- Bathroom is always hot | - Compliant with building regs
60
What are the negatives for a two-pipe semi gravity with a heat sink?
- restricted heat control - only on open vented systems - expensive and inefficient
61
What makes a Y plan heating system?
- 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
What makes an S plan heating system?
- Has zone valves that control the flow of water - Controlled by room stat and cylinder stat - Has automatic bypass connecting flow and return
63
What does a boiler interlock do?
Tells the boiler it needs to shut off
64
What is district heating?
It's a centralised boiler that provides heat to a number of properties
65
What can rainwater cause?
- Penetration to buildings | - affect foundations
66
What are the 5 systems of rainwater discharge?
- Surface water drain - Combined sewer - Watercourse - Soakaway - Rainwater harvesting system
67
What are the 4 rainwater intensity categories?
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
What should the fall on guttering be per metre?
1-3mm
69
What are the 4 types of sanitation systems?
- Primary ventilated stack - Ventilated branch discharge - Secondary ventilated stack - Stub stack
70
What are the requirements of a primary vent stack?
- Needs a P trap - Gradient should be 2.5 degrees on bends - Must have a long radius bend at the bottom
71
What are the requirements for a secondary ventilated stack?
- Minimum diameter is 25mm unless it's longer than 15m (32mm) - 5 storeys is 100mm diameter and above 20 storeys is 150mm
72
What are the requirements for a stub stack?
- 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
What is the equation for weight?
Mass x gravity
74
What is the equation for density?
Mass/ volume
75
What will happen to an object if it's density is higher than 1?
Sinks
76
What is sensible heat?
Energy required to change temperature
77
What is latent heat?
The energy required to change state
78
What are the 6 principle gases?
- Air - Steam - Natural gas - LPG - CO2 - Refrigeration gases
79
What is 1 Bar in KPa?
100 KPa
80
What is charles law?
A volume of gas held at a constant pressure is directly proportional to the temperature
81
What is Boyle' law?
Volume of gas at a constant temperature is inversely proportional to the pressure
82
What type of water do Sulfates create?
permanently hard water
83
How do you calculate mechanical advantage?
Load/effort
84
What type of water do Carbonates create?
Temporarily hard water
85
What is significant about the 1st class lever?
The long arm is proportional to the short arm
86
What is significant about the 2nd class lever?
Force and the load are on the same side of the pivot
87
What is significant about the 3rd class lever?
Load is at the opposite end to the force
88
What is the equation for the velocity ratio?
Distance moved by effort/ distance moved by load
89
Equation for moment?
force x distance

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

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