WorksheetsProgression PPT2
Total questions: 18
Worksheet time: 9mins
What type of system uses an indirect-type hot water storage cylinder?
Direct system
Indirect system
Closed system
Open system
How many types of indirect hot water storage cylinders are mentioned?
One
Two
Three
Four
Which type of indirect hot water storage cylinder is self-venting?
Double-feed
Single-feed
Triple-feed
Quad-feed
What is the main difference between these storage cylinders and direct types?
Size
Material
Heat exchangers
Color
New modern hot water cylinders come with how much insulation?
50mm
100mm
200mm
25mm
What is the primary function of the heat exchangers in these cylinders?
Cool the water
Heat the secondary water
Store the water
Filter the water
Which document of the building regulations does hot water systems apply to??
Part L1
British Standards Institution
WRAS
Part G
A cylinder thermostat is located how far from the bottom of the hot water cylinder?
1/2 way
3/4
1/3
2/3
The boiler will heat the primary water up to
65 degrees
55 degrees
82-85 degrees
100 degrees
Why is the system called a double-feed system?
It uses two types of metal
It has two cisterns for feeding water
It can heat and cool water
It uses two different heating methods
Which component in the system is responsible for indirect heating?
The immersion heater
The copper heat exchanger coil
The primary return connection
The cistern
What is the role of the cistern in the double-feed system?
To store heated water
To feed water into the heating system
To cool the water
To filter the water
How does the cistern contribute to the water system?
It heats the water
It cools the water
It provides the static head to push water out
It filters the water
What is the minimum diameter of the cold feed to the secondary system?
15mm
22mm
28mm
40mm
What is the main reason for replacing gravity circulation with pumped systems?
Efficiency
Cost
Simplicity
Noise reduction
Building regulations state hot water to a bath can NOT exceed what temperature?
65 degrees
55 degrees
48 degrees
100 degrees
Building regulations part G state that stored hot water must never be able to reach
55 degrees
60 degrees
45 degrees
100 degrees
Legionella bacteria will grow at a temperature between
10-15 degrees
45-55 degrees
22-46 degrees
47 degrees and above
