WorksheetsHot Water - PPT 5 - Showers
Total questions: 30
Worksheet time: 15mins
Which of the following is a type of shower mixer valve?
Gravity mixer
Pressure valve
Thermal mixer
Rotary valve
What is one classification of shower mixer valves?
Mains-fed/boosted mixer
Hydraulic mixer
Solar mixer
Pneumatic mixer
What is the purpose of having the cold water feed to the cylinder higher than the cold for the shower in a cistern-fed/gravity mixer system?
To ensure the cold water runs out first
To ensure the hot water runs out first
To balance the water pressure
To reduce water temperature
What is the minimum head required for the shower mixer valve in a cistern-fed/gravity mixer system?
0.5m
1m
1.5m
2m
What is the recommended pipe size before reducing to 15mm in a cistern-fed/gravity mixer system?
10mm
15mm
22mm
30mm
What is required for a cistern-fed/gravity mixer to function properly?
Unequal pressure
Equal pressure
High pressure
No pressure
From where are both the hot and cold water fed in a cistern-fed/gravity mixer?
Directly from the mains
From the CWSC
From a separate tank
From a boiler
What is the minimum head required from the base of the CWSC to the outlet of the shower rose?
0.5m
1m
1.5m
2m
What is the function of a thermostatic valve in a cistern-fed/gravity mixer?
It filters impurities from water.
It controls the water flow rate.
It maintains the required temperature by expanding and contracting.
It adds minerals to the water.
What is the purpose of a twin impellor booster pump in a plumbing system?
To decrease water pressure
To increase pressure for both hot and cold feeds
To filter water impurities
To heat the water
How should a twin impellor booster pump be installed to reduce noise?
Mounted on metal brackets
Fitted with a flexible connector and mounted on rubber pads
Placed directly on the floor
Suspended from the ceiling
What is the function of connecting a cylinder via an Essex flange?
To increase water temperature
To avoid any ingress of air
To reduce water flow
To filter the water
What does connecting a cylinder via an angled hot water distribution pipe allow?
Water to cool down
Air from the cylinder to migrate up to the vent pipe
Water to bypass the shower feed
Water to circulate faster
Where should a single impellor booster pump be used in a plumbing system?
Before the mixer valve
After the mixer valve
At the water source
At the shower head
What is a negative head in plumbing?
Pumping water to a level below the existing CWSC
Pumping water to a level above the existing CWSC
Pumping water at the same level as the existing CWSC
Pumping water without any head
What is a positive head in plumbing?
Pumping water to a level above the existing CWSC
Pumping water to a level below the existing CWSC
Pumping water at the same level as the existing CWSC
Pumping water without any head
What activates a positive head pump?
A manual switch
A magnetic flow switch
A pressure valve
A temperature sensor
What happens if the flowrate is not sufficient in a positive head pump?
The pump will overheat
The switch is not made
The pump will reverse
The pump will shut down
What is a positive head shower operated by?
A flow switch under natural flow of water
An electric pump
A manual valve
A pressure sensor
What is another name for a negative head pump?
Centrifugal pump
Positive head pump
Submersible pump
Diaphragm pump
At what height does a negative head start below the CWSC?
600mm
500mm
700mm
800mm
What type of valve does the outlet of a negative head pump have?
Non-return valve
Ball valve
Gate valve
Butterfly valve
What activates a negative head pump?
Magnetic flow switch
Manual switch
Pressure sensor
Temperature sensor
What is a key feature of negative head showers?
Operated by a flow switch under a 'charge'
Operated by a manual valve
Operated by a pressure sensor
Operated by a temperature gauge
What force does a negative head pump use to move water to a higher level?
Gravitational force
Centrifugal force
Magnetic force
Electrical force
What feature does an instantaneous electric shower incorporate to prevent water flow when electrics are on?
High-pressure valve
Low-pressure heating element cut-off solenoid
Manual switch
Automatic timer
How is the shower protected in an instantaneous electric shower system?
Single-pole switch
Double-pole pull cord isolator
Circuit breaker
Fuse
What is the purpose of a double-pole isolating switch in the wiring of electric showers?
To control water temperature
To isolate the electrical supply
To regulate water pressure
To enhance water flow
What type of water heater is used for showers in an unbalanced feed system?
Combination boiler or instantaneous water heater
Solar water heater
Electric immersion heater
Gas-fired water heater
What is required to manage pressure in an unbalanced feed shower system?
A pressure compensating shower valve
A water softener
A temperature regulator
A flow restrictor
