Refrigeration CSCS Mock Test

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Specialists Test

HVACR - Refrigeration and Air Conditioning

1 / 46

Why must you never use oxygen when pressure testing?

There is too much temperature pressure difference and a true record will not be given

The molecules of the gas are too small

The pressure required would not be reached

When oxygen meets oil in a compressor it could explode and cause serious injury or death

2 / 46

If refrigerant gases are released into a closed room in a building, what would they do?

Stay at the same level

Disperse safely within the room

Sink to the floor

Rise to the ceiling

3 / 46

If you have to drill through a wall panel that you suspect contains an asbestos material, what should you do?

Ignore it and carry on

Put on safety goggles

Stop work and report it

Put on a dust mask

4 / 46

What is the first thing you should do after getting on to the platform of a correctly erected mobile tower?

Close the access hatch to prevent falls of personnel, tools or equipment

Make sure that the tower does not rock or wobble

Check for overhead power lines

Check that the brakes are locked on

5 / 46

Which of these statements is true in relation to the safe working load (SWL) of lifting equipment?

It may be exceeded by no more than 25%

It is provided for guidance only

It is never marked on the equipment but kept with the test certificates

It is the absolute maximum safe working load

6 / 46

What is the recommended maximum height for a free-standing mobile tower?

12 m

2 m

There is no restriction

The height recommended by the manufacturer

7 / 46

When working on refrigeration systems containing hydrocarbon (HC) gases, what particular danger needs to be considered?

Special personal protective equipment (PPE) should be worn to prevent injuries caused by the cold

There should be no sources of ignition

The work cannot be carried out when the weather is hot

Extra lighting is needed to prevent trips

8 / 46

Who is permitted to install, service or maintain systems that contain or are designed to contain refrigerant gases?

A competent, trained person who works for an F-Gas registered company

A Gas Safe registered engineer

The person whose plant contains the gas

A fully qualified electrician

9 / 46

If you spill some oil on the floor and you do not have any absorbent material to clean the area, what should you do?

Keep people out of the area and inform your supervisor

Spread it about to lessen the depth

Do nothing, as it will eventually soak into the floor

Warn other people as they tread through it

10 / 46

When using a blowtorch or brazing equipment to joint copper tube and fittings in a property, how should a fire extinguisher be made available?

It should be available in the immediate work area

It should be available only if a property is occupied

It should be held over the joint while you are using the blowtorch

It should be used to cool the fitting

11 / 46

What must be done first before any roof work is carried out?

A weather forecast must be obtained

Permits to work must be issued only to those allowed to work on the roof

A risk assessment must be carried out

The operatives working on the roof must be trained in the use of safety harnesses

12 / 46

What must be clearly marked on all lifting equipment?

The next test date

The specification of material from which it is made

The safe working load

The name of the manufacturer

13 / 46

When assembling a mobile tower what major hazard must you be aware of?

Cable trays

Overhead service cables

Water pipes

False ceilings

14 / 46

What should be done before a mobile tower is moved?

The principal contractor must give their approval

All people and equipment must be removed from the platform

A permit to work must be issued

Arrangements must be made with the forklift truck driver

15 / 46

What safety devices should be fitted between the pipes and the gauges of oxyacetylene brazing equipment?

Flashback arresters

Non-return valves

On-off taps

Flame retardant tape

16 / 46

When using a van to transport a refrigerant bottle, how should it be carried?

In a purpose-built container within the rear of the van, with appropriate signage

In the passenger footwell of the van

In the back of the van

In the van with all the windows open

17 / 46

Which of these statements is true of the water in water-cooled systems?

It should be drinking water

It should be chemically treated

It should be replaced annually

It should be properly filtered

18 / 46

When handling refrigerant gases, what personal protective equipment (PPE) should you wear as a minimum?

Overalls, thermal-resistant gloves, helmet and safety boots

Eye protection, overalls, thermal-resistant gloves and safety boots

Eye protection, overalls, harness and safety boots

Eye protection, overalls, thermal-resistant gloves and helmet

19 / 46

What should you ensure when pressure testing with nitrogen?

That the temperature of the bottle is at room temperature to avoid a temperature pressure difference

That the nitrogen gauge can take the pressure required and that the bottle is secured upright

That purge brazing has taken place during the installation

That the nitrogen bottle is laid down to avoid it falling over

20 / 46

Why is it essential to take great care when handling oxygen cylinders?

They contain poisonous gas

They are filled to extremely high pressures

They contain highly flammable liquid gas

They contain highly flammable compressed gas

21 / 46

How should cylinders (full or empty) that contain liquefied petroleum gas (LPG) or acetylene be stored on site?

In a locked cage at least 3 m from any oxygen cylinders

As close to the point of use as possible

Covered by a tarpaulin to shield the compressed cylinder from sunlight

In a locked cellar with clear warning signs

22 / 46

What is edge protection designed to do?

Make access to the roof easier

Prevent the fall of people and materials

Prevent rainwater running off the roof onto workers below

Secure tools and materials close to the edge

23 / 46

When repairing an electrically driven compressor, what is the minimum safe method of isolation?

Pressing the stop button

Turning off the local isolator

Locking off and tagging out the local isolator

Pressing the emergency stop button

24 / 46

You have been asked to install a number of ceiling-mounted air-conditioning units in a large, open-plan area, which has a good floor. What is the best way to access the work area?

By standing on packing cases

From scaffold boards and floor stands

From a stepladder

From a mobile tower

25 / 46

How should extension leads in use on site be positioned?

They should be laid out in the shortest, most convenient route

They should be raised on bricks

They should be coiled on a drum or cable tidy

They should be located so as to prevent a tripping hazard

26 / 46

What should you do when it is necessary to cut into an existing refrigerant pipe?

Not carry out the work at all, because of the risks

Vent the gas in the pipework to atmosphere

Recover the refrigerant gas and make a record of it, then do the work

Work on the pipework with the refrigerant gas still in it

27 / 46

If you find a coloured wire sticking out of an electrical plug what is the correct action to take?

Pull the wire clear of the plug and report it to your supervisor

Push it back into the plug and carry on working

Mark the item as defective and follow your company procedure for defective items

Take the plug apart and carry out a repair

28 / 46

When planning a lifting operation how should the sequence of operations to enable a safe lift be confirmed?

Via a notice in the canteen

In a method statement

In a radio telephone message

By verbal instruction

29 / 46

When a refrigerant leak is reported in a closed area, what should you do first before entering the area?

Ventilate the area

Wear safety footwear

Establish that it is safe to enter

Get a torch

30 / 46

Where is the safest place to store refrigerant cylinders when they are not in use?

In the immediate work area, ready for use the next day

Outside in a special locked storage compound

In a company vehicle

Inside the building in a locked cupboard

31 / 46

When working in a riser, how should access be controlled?

By a site security operative

By the main contractor

By a permit to work system

By those who are working in it

32 / 46

How should you position the exhaust of an engine-driven generator that has to be run inside a building?

In another room

In a riser

In a stairwell

Outside the building

33 / 46

Which item of electrical equipment does not require portable appliance testing?

240-volt charger for battery-powered tools

110-volt electrical power tool

240-volt electrical power tool

Battery-powered rechargeable power tool

34 / 46

If you are carrying out hot works with a blowtorch, when should you stop using it?

At least two hours before you leave the site

Just before you leave the site

At least one hour before you leave the site

At least four hours before you leave the site

35 / 46

What should you do if you need additional temporary wiring for your power tools whilst working on site?

Find some cable and extend the wiring yourself

Disconnect a longer cable serving somewhere else and reconnect it to where you need it

Speak to an electrician and ask them to do the temporary wiring

Stop work until an authorised supply has been installed

36 / 46

What must you ensure before using a ladder?

That the weather forecast is for a bright, clear day

That no-one else has booked the ladder for their work

That an apprentice or workmate is standing by in case you slip and fall

That it is secured to prevent it from moving sideways or sliding outwards

37 / 46

If you are working where welding is being carried out, what should be provided to protect you from welding flash?

A fire extinguisher

A hi-vis vest

Warning notices

Screens

38 / 46

You have to carry out a job, over a few days, on the flat roof of a two-storey building, about 1 m from the edge of the roof, which has a low parapet. How should you reduce your risk of falling?

Carry on with the job, provided you don't get dizzy with heights

Use a full body harness, lanyard and anchor while doing the job

Get your mate to do the work, while you hold on to them

Ask for double guard-rails and toe-boards to be installed to prevent you falling

39 / 46

How should you position the bottles when using oxyacetylene brazing equipment?

Laid on their side and secured

Stood upside down

Angled at 45°

Stood upright and secured

40 / 46

Where should liquefied petroleum gas (LPG) cylinders be positioned when supplying an appliance in a site cabin?

Inside the cabin in a locked cupboard

Outside the cabin

Under the cabin

Inside the cabin next to the appliance

41 / 46

What should you establish before entering a cold room?

The size of the cold room

Whether there are lights and power in the cold room

The temperature of the cold room

Whether the exit door is fitted with an internal handle

42 / 46

When a new piece of plant has been installed but has not been commissioned, how should it be left?

With all valves and switches turned off

With all valves and switches locked off

With all valves and switches clearly labelled

With all valves and switches turned on and ready to use

43 / 46

When positioning and erecting a stepladder, which of the following is essential for its safe use?

Your supervisor has positioned and erected the steps

The restraint mechanism is spread to its full extent

You will be able to reach the job by standing on the top step

It has a tool tray towards the top of the steps

44 / 46

What is the first thing that should be done when a new refrigeration system has been installed?

It should be left open to the air

It should be pressure and leak tested

It should be turned off at the electrical switch

It should be filled with refrigerant

45 / 46

Which of these items of personal protective equipment (PPE) is designed to protect against infrared radiation damage to the eyes during flame cutting or welding?

Clear goggles

Dust mask

Eye protection with a tinted filter lens

Respiratory protective equipment (RPE)

46 / 46

Which two of the following are essential safety checks that need to be carried out before using oxyacetylene equipment?

That the cylinders are the right weight

That the trolley wheels are the right size

That the cylinders, hoses and flashback arresters are in good condition

That the cylinders are full

That the area is well ventilated and clear of any obstructions

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