Carbon and Fossil Fuels

CRDi (Common Rail Direct Injection) is indeed one of the latest technologies used in modern diesel engines. It uses a high-pressure common rail fuel system with precise electronic control, offering better fuel efficiency, lower emissions, and improved performance compared to older injection systems like direct injection or mechanical pumps.

CRDi stands for Common Rail Direct Injection. This technology uses a single high-pressure common rail that supplies fuel to all injectors, with electronically controlled injection timing and quantity for optimal combustion. The other options are incorrect: Central Rod/Rail variations don't exist as industry terms.

MPFI stands for Multi Point Fuel Injection (also called Multi-Point Fuel Injection). This gasoline engine technology injects fuel into each cylinder's intake port individually, providing better fuel atomization and efficiency compared to carburetors or single-point injection. Option A 'Many Point' is incorrect terminology.

One gallon of motor oil can indeed contaminate approximately one million gallons of freshwater, creating an oil slick that spreads over acres. This is why proper oil disposal is critical for environmental protection. The EPA and environmental agencies widely cite this statistic.

Coal combustion is the largest single source of anthropogenic carbon dioxide emissions globally, contributing more than oil or natural gas. Burning coal releases more CO2 per unit of energy than other fossil fuels. This makes it the primary driver of human-made atmospheric CO2 increase.

The statement is TRUE. "Clean coal" technology (carbon capture and storage) requires additional energy to operate, meaning more coal must be burned to generate the same amount of electricity. Estimates suggest 15-25% more coal is needed. This creates a paradox - you need more mining (which itself is carbon-intensive) to achieve lower emissions at the plant.

Butane is commonly used in cigarette lighters because it is easily liquefied under pressure and vaporizes quickly at room temperature. Propane is used in camping stoves and heating, methane is natural gas, and ethane is primarily used in industrial chemical production.

Petrol cars use spark plugs for ignition, while diesel engines use compression ignition and do not have spark plugs. They use glow plugs for cold starting instead. The two types require different ignition systems.

Benzene is a known carcinogen present in unleaded petrol as part of the aromatic hydrocarbon blend used to increase octane rating. Lead was used in leaded petrol, not unleaded petrol, and has been phased out. Methane and toluene are not classified as carcinogens in the same way as benzene.

Used motor oil contains heavy metals and toxic chemicals that can contaminate water supplies. Just one gallon can pollute up to one million gallons of freshwater, making it unsafe for drinking and harming aquatic life.

In American English, 'Petrol Pump' is called 'Gas Station'. 'Petrol' is the British English term for what Americans call 'gas' or 'gasoline'. Similarly, 'mobile phone' in British English is 'cell phone' in American English.

The correct answer is A (3.0% of Volume). In India, the maximum emission limit for carbon monoxide (CO) from petrol-driven four-wheeled vehicles is 3.0% by volume. This is a standard regulatory limit for vehicle emissions testing.