Vehicle Maintenance — DGT theory test questions

Vehicle Maintenance is one of the topics tested on the official Spanish DGT theory exam. Work through the questions below in English — each one shows the correct answer and a clear explanation of the rule behind it — then take a full topic test to check you are ready.

38 questions

• Which of the following is NOT a benefit of good vehicle maintenance?
• How should the engine oil level be checked with the dipstick?
• While driving, the oil pressure warning light comes on the dashboard. What should you do?
• Where should oil be added to the engine?
• Bluish-white smoke comes from the exhaust pipe. What does this normally indicate?
• Why should any engine oil spill be cleaned up immediately?
• Where and how is the coolant level checked?
• What is antifreeze used for in the cooling system in winter?
• What happens if the engine idle speed is set too high?
• In an open (serviceable) battery, what should be used to keep the electrolyte above the plates?
• What is the function of the vehicle battery?
• Which component charges the battery while the engine is running?
• When you turn the ignition, the starter motor turns very slowly or not at all. What is the most likely cause?
• In a petrol engine, which component generates the spark that ignites the air-fuel mixture?
• The brake fluid in the reservoir is dark and dirty-looking. What does this mean?
• When braking, you hear a squeak and notice reduced brake response. What is this most likely a sign of?
• What is the minimum legal tread depth for tyres?
• How often should you check tyre pressure, including the spare?
• Why is it advisable to rotate the tyres and align the wheels regularly?
• During a light check you find a blown bulb. What should you do?
• Why should the light lenses be kept clean?
• The wiper blades streak and squeak. What should you do?
• The wipers work but no fluid comes out of the nozzles. What should you check?
• What should you look for when inspecting the vehicle's belts and hoses?
• What are the consequences of a faulty exhaust system?
• What is the function of the engine air filter?
• What is the cabin filter (pollen filter) for?
• What purpose do the transmission and power steering fluids serve?
• Why is it recommended to refuel at reputable service stations?
• In some diesel vehicles, what specific maintenance task may be required in the fuel system?
• What type of oil and additive is advisable to prepare the vehicle for winter?
• In summer, what precaution should you take with tyre pressure?
• What is the advantage of keeping a vehicle maintenance logbook?
• What is the ITV in Spain?
• Which of the following aspects does the ITV check?
• A warning light comes on the instrument cluster while you are driving. What should you do?
• As a new driver, what is a good preventive maintenance habit?
• When is it advisable to see a professional mechanic?