WorksheetsIRTEC Trailers
Total questions: 29
Worksheet time: 15mins
What is the meaning of the word 'Obligatory'?
Fitted By the factory
Required to be fitted by law
Not necessary
Aftermarket fitment
Which of these defect categories describes a defect which has no immediate impact on the environment or safety of the trailer?
Minor
Major
Dangerous
Advisory
Which parts of a trailer need NOT be checked, as the MOT tester might not check it?
Wiring along the chassis
Security and corrosion of pneumatic brake lines
Wheel bearing play
Colour scheme and company logo
What standards are set by the MOT testers manual?
The best standards
The highest standards
The Highest standards
The legal minimum standards
The best way to improve the accuracy of a PMI inspection is to have what?
A good logical and systematic process applied to your inspection
A cup of coffee
All day to do it
The threat of being sacked if you miss something
When inspecting a wheel, which is the best description of what defects are being looked for?
Loose wheel nuts or studs
Cracks in the wheel, & loose wheel nuts or studs
Loose wheel nuts or studs, wheel damage, the size of the wheel
Loose wheel nuts or studs, cracked nut washers, wheel condition for buckles and cracks.
Which of these answers shows the highest speed rating?
J
148/142 K
L
120 K/ph
What is the meaning of FRT marked on the sidewall of a tyre?
Steered axle only
Front Fitment only
Not suitable for a driven axle
Trailer use only
Which of these is the load index on a tyre?
148/142
L
1219
300kg
A tyre has the following marking, 150/144, what does it mean?
As a single the load rating is 144
Capable of 150kph
As a twin set up, it has a load rating of 144
Date of manufacture code
Which statement is correct? A tyre on a trailer with the direction of rotation arrow pointing in the wrong direction
Is a Dangerous defect
A minor defect
Advisory
No defect
How can you be certain that the load rating of a tyre is sufficient for the trailer it is on?
Check the handbook
Look at the axle rating on the trailer and look load index in the MOT manual at the chart
Look at the axle rating on the trailer and see if the load index matches the others
All tyres have a sufficient load rating, so you do not need to check
A tyre's load rating looks too low for the vehicle, and so it is an MOT fail. What is the best way to check it?
Note the load rating on the tyre, single or twin set up, look up in a chart (from the MOT manual) and compare with VTG plate for the axle
You can phone the tyre fitter or manufacturer and ask
The maximum axle weight is stamped on the side of the tyre, easy!
Ask someone at work who knows.
What are the minimum tread depth reqiurements of a trailer tyre?
1mm.
1.6mm across central 3/4
1mm across central 3/4
1mm across any 3/4 of the width, and in continuous band
Which of these cuts to a tyre is OK and would NOT fail an MOT test?
A cut less than 25mm, down to the chords but you cannot see them
Any cut which makes a tread block likely to seperate
A cut over 25mm down to the cords, but you cannot see them
A long cut over 25mm, but not deep enough to reach the cords
How much of each tyre must be inspected?
Every inch externally, ie, all of it
The tread for depth and pattern
Only the sidewalls
Only the bits you can see easily without lying down ( H&S )
Over how much of the tyres width must the tread be checked? (Read carefully!)
Any 3/4
The central 3/4
All of it
The outer shoulders
Which of these would be a defect?
Rear under-run bar plastic ends missing
Side guards rails too close together horizontally, (less than 100mm
Side guards securely fitted
Rear under-run bar ends missing and exposing sharp edges
What defect category is a sideguard which is 'insecure'?
Advisory. Tighten it up
Minor. Tighten it up
Major.
Dangerous
What might be a major or dangerous defect with a spare wheel.
Incorrect colour
Incorrect size
Insecure so it may become detached
Not in proper condition
What is the maximum wear allowed on the coupling king pin?
No wear at all
When tractor rocks back and forth, no perceptable wear at all
When it has worn to 3/4 of the original
Up to 2mm
What should happen if the emergency (red) airline is disconnected from the towing vehicle?
Only on multi axle trailers, the forward axle brakes are applied
The trailer park brake can be set to 'Park'
The emergency brake should apply automatically
The trailer brakes are off and released
Which of the following is a defect on a landing leg?
A missing landing leg
An insecure leg or parts on it that may fall off
No landing legs at all
No means of lowering or raising the leg (handle missing)
Which of these trailers does not require to have wings?
A trailer adapted to carry round timber
A trailer over 10 metres long
A trailer designed to carry light goods, such as toilet rolls.
A solid floor curtain-sider
What is the default minimum mudflap height from the road to the lowest part?
200mm
300mm
400mm
100mm
How much of a post April 1st 2000 trailer tyre's width must be covered by the spray suppression when viewed from the rear?
The whole width
The tread width, excluding sidewall
3/4 of the tyres width
315mm
Which of the following is NOT an MOT defect which would cause an MOT failure on a trailer?
Superficial damage
Serious damage, but not loose.
Inappropriate modification
Insecure or fractured part
You are preparing an old trailer for an MOT and not sure if it requires ABS. How can you find out?
It will say on the VTG plate
If it should have ABS, it will be fitted and have the connection plug
Ask a friend or colleague
There is detailed information in the MOT manual, section 38
When checking a chassis for corrosion, what is the measure of a deficiency?
Where corrosion has discoloured the paintwork
Any rust on a load bearing structure is a defect
Where the load bearing component's strength is weakened by the corrosion
When you can dent it easily with a tapping hammer
