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Progression Revision 8

Total questions: 47

Worksheet time: 24mins

Name
Class
Date
1.

Pitting is a form of corrosion?

a)

True

b)

False

2.

Which one of the following materials will reflect the greatest amount of radiant heat?

a)

Cast iron

b)

Polished aluminium

c)

Oxidised copper

d)

Galvanised steel

3.

An alloy is a mixture of two or more metals?

a)

True

b)

False

4.

Which one of the following identifies a method of increasing hot water system efficiency?

a)

Increasing system flow rate

b)

Increasing system pressure

c)

Adding corrosion inhibitor

d)

Adding pipe insulation

5.

Which of the following has a combustion temperature of 1930∘1930^\circ C?

a)

Propane

b)

Butane

c)

Acetylene

d)

Natural gas

6.

273 K273\,\mathrm{K} is the equivalent of how many ∘^\circ C?

a)

100

b)

-10

c)

0

d)

10

7.

One Pascal is equal to one

a)

Gauge

b)

1 N/m21\,\mathrm{N/m^2}

c)

Bar

d)

1 kg/m21\,\mathrm{kg/m^2}

8.

Which of the following is required for combustion to occur? A fuel supply, oxygen plus a

a)

Source of ignition

b)

Supply of air

c)

Supply of gas

d)

Source of light

9.

The rate at which an object changes its position. This statement best describes which one of the following principles?

a)

Acceleration

b)

Flow rate

c)

Velocity

d)

Force

10.

A property is supplied with hard water. What will be the direct effect of the limescale deposits on the plumbing system?

a)

Corrosion of the copper pipework

b)

Faulty WC flushing mechanisms

c)

Water hammer

d)

Decrease in system efficiency

11.

What is the SI unit for force?

a)

Pascal

b)

Watt

c)

Newton

d)

Litre

12.

Which one of the following components would be installed into a sealed central heating system to prevent explosion?

a)

Pressure reducing valve

b)

Non-return valve

c)

Expansion relief valve

d)

Gate valve

13.

When water freezes, its volume increases by approximately

a)

20%

b)

10%

c)

50%

d)

5%

14.

Which one of the following is the unit of measurement for resistance?

a)

Amps

b)

Ohm

c)

Watt

d)

Volts

15.

Which one of the following solid materials conducts heat the least?

a)

Polyurethane

b)

Brass

c)

Copper

d)

Low carbon steel

16.

Refer to the following equation: Original length × temperature rise × coefficient of expansion. Which one of the following does the equation relate to?

a)

Pressure exerted

b)

Expansion within a system

c)

Expansion in a vessel

d)

Linear expansion

17.

Which one of the following relates specifically to heat capacity?

a)

Kilojoules, kilograms and degrees kelvin

b)

Kilojoules, seconds and degrees kelvin

c)

Kilojoules, seconds and degrees celsius

d)

Kilojoules, kilograms and degrees celsius

18.

Which of the following pipes, each measuring 6 m in length, will offer the greatest resistance to the flow of water?

a)

15 mm pipe with four machine bends

b)

15 mm pipe with four elbows

c)

15 mm pipe with two machine bends and two elbows

d)

22 mm pipe, which reduces down to 15 mm halfway along its length

19.

What is the intensity of pressure acting at the base of a 7 m long pipe, which has a head height of 3 m3\,\mathrm{m} (Gravity = 9.81 kN/m29.81\,\mathrm{kN/m^2} )?

a)

29.43 kPa29.43\,\mathrm{kPa}

b)

19.81 kPa19.81\,\mathrm{kPa}

c)

24.67 kPa24.67\,\mathrm{kPa}

d)

32.49 kPa32.49\,\mathrm{kPa}

20.

What is the freezing point of water at sea level?

a)

100 C

b)

0 C

c)

25 C

d)

75 C

21.

Which of the following materials is the best conductor of heat?

a)

Copper

b)

Low carbon steel

c)

Lead

d)

Cast iron

22.

What would the fuse size be for a domestic appliance that has a power rating of 3 kW3\,\mathrm{kW} ?

a)

13 amp

b)

3 amp

c)

10 amp

d)

5 amp

23.

Which of the following values reflects the pH value for pure water?

a)

4

b)

11

c)

7

d)

1

24.

The limescale build-up in systems is caused by:

a)

Soft water

b)

Temporary hard water

c)

Acidic water

d)

Permanently hard water

25.

If a customer painted their central heating pipework, what would that protect it from?

a)

UV corrosion

b)

Electrolytic corrosion

c)

Pitting

d)

Atmospheric corrosion

26.

On an incoming mains, which of the following would have the lowest pressure?

a)

The float-operated valve to the cold water storage cistern in the loft

b)

The cold water tap at the kitchen sink

c)

The first floor basin cold tap

d)

The downstairs WC float-operated valve

27.

The build-up of limescale in a hot water system could be noticed by:

a)

The hot water flow rate increasing

b)

The hot water temperature being hotter

c)

The hot water temperature being cooler

d)

The hot water recovery time decreasing

28.

Which one of the following is an underground water source?

a)

Borehole

b)

River

c)

Lake

d)

Stream

29.

Which one of the following must only be provided from a wholesome water source?

a)

Washing machine water

b)

Drinking water

c)

Garden irrigation water

d)

WC flushing

30.

What is the minimum recommended size of a cold water distributing pipe feeding a bath tap outlet in an indirect cold water system?

a)

22mm

b)

15mm

c)

10mm

d)

28mm

31.

Which of the following provides protection against backflow at a wash basin tap in a dwelling?

a)

A single check valve

b)

A pressure-relief valve

c)

An air gap

d)

A service valve

32.

Component X in the following drawing is a?

a)

Fibre washer

b)

Wedge-shaped gate

c)

Ceramic disc

d)

Rubber washer

33.

Which one of the following is an unsuitable type of joint to be used on cold water pipework?

a)

Lead wiped joint

b)

Lead propriety joint

c)

Pushfit joint

d)

Capillary joint

34.

The water regulations state that a service valve must be fitted before:

a)

A water heater inlet

b)

A bath tap outlet

c)

A single check-valve

d)

A sink tap outlet

35.

Which of the following should be used to make a hole in a plastic feed and expansion cistern?

a)

Heated copper tube

b)

Pad saw

c)

Heated compression fitting

d)

Hole saw

36.

Which one of the following requirements should be applied to a cold water distributing pipe, laid in a sleeve, in a solid floor without an accessible cover?

a)

The sleeve must be fitted with a connection to the drain

b)

The sleeve must feature a self-collapsing design

c)

The pipe must be capable of being easily withdrawn for repair or renewal

d)

The pipe must be fitted with trace heating to guard against freezing

37.

Which one of the following is normally required when fixing sink pillar taps to a stainless steel sink top?

a)

Fibre washers

b)

Putty and jointing paste

c)

Silicone sealant

d)

Top-hat washers

38.

Which one of the following could be used when connecting an outside tap into an existing cold water supply pipe when the stop valve fails to isolate the supply?

a)

Pipe freezing kit

b)

Float-operated valve

c)

Backflow prevention device

d)

Hydraulic test kit

39.

The cold water supply to a wash hand basin fed from an indirect cold water system is normally isolated at the:

a)

Service valve on the cold feed pipe to the hot water storage cylinder

b)

Stop valve to the WC flushing cistern

c)

Service valve on the distributing pipe from the cold water storage cistern

d)

Supply stopvalve under kitchen sink

40.

The main risk when leaving open ends connected to a 'Live' cold water system when work is taking place is?

a)

Theft

b)

Fire

c)

Contamination

d)

Flooding

41.

A visual inspection of a cold water system is normally carried out:

a)

After soundness-testing a system

b)

After filling before soundness-testing a system

c)

Before filling a system

d)

Before soundness-testing but after performance-testing a system

42.

Which one of the following can be used to establish the soundness test pressure in a cold water system?

a)

Pipe freezing kit

b)

Multi-meter

c)

Manometer

d)

Hydraulic test kit

43.

While installing pipework in a property, you are called off site to another job. What would be the correct course of action with any open-ended pipework?

a)

Be as quick as you can to return.

b)

Cap off with a push fit fitting

c)

Place a warning label on every open end

d)

Warn the customer not to interfere with any pipework

44.

One of the major problems when leaving a dead leg in a cold water pipe is:

a)

Electrolytic corrosion

b)

Pitting of pipework

c)

Reduction in water flow

d)

Possible bacterial growth

45.

The use of WRAS approved fittings when installing cold water pipework is

a)

To be corrosion resistant

b)

To avoid contamination

c)

A legal requirement

d)

All of the above

46.

On the completion of a new cold water installation, the system has been proven sound. What would the next course of action be?

a)

Flush the pipework out then hand over to the customer

b)

Prepare the benchmark certificate

c)

Visual inspection with the customer

d)

Hand over to the customer.

47.

What is the most cost effective way to repair a stop valve that has the head gear jammed open?

a)

Replace the head gear only

b)

Replace the whole valve

c)

Repack the glands around the spindle.

d)

Leave in position, and install a new stop valve upstream

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