vehicle system Flashcards
What are the three types of unleaded gasoline available in the U.A.E. and their octane ratings?
‘E-plus’ Red (91 octane), ‘Special’ Green (95 octane), ‘Super’ Blue (98 octane).
Why is lead no longer added to petrol?
Lead was found to pose a threat to human health and have long-term harmful effects on the environment due to vehicle exhaust emissions.
What is the primary function of a catalytic converter in a car’s exhaust system?
It converts harmful compounds in exhaust gases into harmless compounds.
What should you do if you notice an abnormally loud noise from your car’s exhaust system?
It may indicate that the silencer has been damaged or has developed a crack, and it should be checked.
What is the role of fuses in a vehicle’s electrical system?
Fuses protect the electrical system from damage or fire.
When using jump leads, what is a critical safety precaution to take?
Do not connect the last end to the negative terminal of the discharged battery to avoid sparks that may detonate gas around the battery.
What type of headlights should be used on dark roads?
A full beam headlight
What should you check if the generator’s output drops and a warning lamp lights up on the dashboard?
Check the adjustment of the drive belt connected to the generator.
What does the oil pressure warning light indicate when it is red?
It shows that the oil is dangerously low or isn’t circulating properly.
What is the function of the ABS warning light on the instrument panel?
It indicates a problem with the Anti-lock Braking System (ABS).
How does a manual gearbox differ from an automatic gearbox in terms of operation?
A manual gearbox has a clutch pedal for manual gear changes, while an automatic gearbox shifts gears automatically based on speed.
What is the purpose of the main brake system in a vehicle?
It acts on all four wheels and is hydraulically operated, providing the primary braking force.
What is the significance of the Tread Wear Indicator (TWI) on tires?
It helps determine the condition of the tire; when the tread wears down to about 3 mm, the tire starts to lose grip.
What should you do if you notice a drop in brake fluid level?
A drop of several centimeters signals a leak, while a small drop indicates that the brakes may be wearing out and need attention.
Why is it important to check the air pressure in your tires regularly?
Maintaining standard air pressure improves mileage and ensures better control and grip on the road.
