Choose an answer to see straight away whether it is right, and why. Read the rule first if you need to.
Your windscreen mists up on the inside on a rainy day. Which setting clears it fastest?
The A/C dries the air and fresh air replaces the moist air inside. Recirculation keeps the moist air in the car.
Answer B. The A/C dries the air and fresh air replaces the moist air inside. Recirculation keeps the moist air in the car.
Why does using recirculation make a misted windscreen worse?
Recirculation reuses the air in the car, which holds the moisture from breath and wet clothes. Choose fresh air to demist.
Answer A. Recirculation reuses the air in the car, which holds the moisture from breath and wet clothes. Choose fresh air to demist.
On a humid monsoon morning with the A/C on, mist forms on the outside of the windscreen. What should you do?
Outside mist forms when the A/C makes the glass colder than the humid air outside. Inside heat will not clear it; the wipers will.
Answer A. Outside mist forms when the A/C makes the glass colder than the humid air outside. Inside heat will not clear it; the wipers will.
What does the rear defogger do?
The rear defogger heats the lines printed on the rear window, and in many cars the door mirrors as well. It usually switches off after 10 to 15 minutes.
Answer D. The rear defogger heats the lines printed on the rear window, and in many cars the door mirrors as well. It usually switches off after 10 to 15 minutes.
Your windscreen is misted and you have cleared only a small patch in front of you. What should you do?
Driving through a small cleared patch hides pedestrians, two-wheelers and signals. Clear the windscreen, side windows and rear window first.
Answer D. Driving through a small cleared patch hides pedestrians, two-wheelers and signals. Clear the windscreen, side windows and rear window first.
What is the minimum visual light transmission for a car's windscreen in India?
Rule 100 of the Central Motor Vehicles Rules requires at least 70% for the windscreen and rear window, and at least 50% for side windows.
CMV Rules, Rule 100
Answer D. Rule 100 of the Central Motor Vehicles Rules requires at least 70% for the windscreen and rear window, and at least 50% for side windows.
May you paste a tinted film on your car's windows in India?
In 2012 the Supreme Court ruled that no film of any kind may be pasted on the safety glass of vehicles.
Supreme Court, Avishek Goenka v. Union of India (2012)
Answer B. In 2012 the Supreme Court ruled that no film of any kind may be pasted on the safety glass of vehicles.
The windscreen mists up while you are driving and does not clear. What should you do?
Wiping while moving smears the glass and takes your eyes off the road. If the demister does not clear it, stop safely.
Answer D. Wiping while moving smears the glass and takes your eyes off the road. If the demister does not clear it, stop safely.
Why does the air-conditioning help to demist the windows, even in cold weather?
The A/C removes moisture from the air, and dry air clears mist quickly. It works even with the temperature set to warm.
Answer D. The A/C removes moisture from the air, and dry air clears mist quickly. It works even with the temperature set to warm.
Which windows should be clear before you set off?
You need the side windows for your mirrors and blind spots, and the rear window to see behind. Clear them all before moving off.
Answer C. You need the side windows for your mirrors and blind spots, and the rear window to see behind. Clear them all before moving off.