WorksheetsKey plumbing principles
Total questions: 15
Worksheet time: 8mins
Which one of the properties of water is shown by its pH value?
It’s degree of acidity or alkalinity.
It’s electrical conductivity
The amount of heat it contains.
It’s heat conductivity
Capillarity in liquids may occur between two close fitting surfaces
When the surfaces are in a horizontal or vertical position
Only when the surfaces are at an angle of 45 degrees
Only when the surfaces are at an angle of less than 30 degrees
Only when the surfaces are in a horizontal position
Given that all holes have the same diameter, the water pressure is greatest at hole
A
B
C
D
The process of siphonage utilises
Vacuum pumps.
Capillary action
Atmospheric pressure
Specific gravity
Water pressure
Capillary attraction would be greatest in tube
A
B
C
D
Relative density is the
Density of a substance divided by its volume
Density of a substance in comparison to the density of water
Density of water displaced when a substance is placed in water
Force exerted by the density of a substance
Which one of the following metals needs to be treated if it is exposed to the effects of atmospheric corrosion?
Iron.
Galvanised steel.
Lead.
Zinc.
During electrolytic action the
Anode will gradually destroy the cathode
Cathode will gradually destroy the anode
Electrolyte will be used up and disappear
Electrolyte will destroy the cathode
Socket outlets in a domestic property usually have a maximum amp rating of
6 Amps
5 Amps
13 Amps
3 Amps
It would be most appropriate for a plumber to use temporary earth continuity bonds when
Flushing a domestic hot water system
Working on a central heating control panel
Changing a cold water tap washer
Removing a section of system pipework
1. Atmospheric pressure at sea level is:
303.1Pa
201.3Pa
101.3Pa
111.3Pa
The energy used to heat 1 kg of water by 2ºC is 8.372 kJ. The specific heat value for water is
0.385 kJ / kg / ºC
4.186 kJ / kg / ºC
6.852 kJ / kg / ºC
8.372 kJ / kg / ºC.
Water from an area which has a limestone and chalk bedrock, is most likely to be
Cloudy
Chalky
Alkaline
Acidic
If a magnet is passed in and out of, or around, a copper wire wound around a soft iron core, the electricity generated would be
Direct current DC
An indirect current
Static electricity
An alternating current AC
Which pipe will expand the most when heated-
