CAE Vehicle Dynamics & Powertrain

Question 1

What is the Otto cycle in internal combustion engines?

Accepted Answer

A four-stroke thermodynamic cycle (intake, compression, power, exhaust) used in spark-ignition engines

Answer

A two-stroke cycle used in diesel engines

Answer

A rotary engine combustion process

Answer

A turbine engine operating cycle

Question 2

What is the purpose of a catalytic converter in a vehicle's exhaust system?

Accepted Answer

To chemically convert harmful pollutants (CO, HC, NOx) into less harmful emissions (CO2, H2O, N2)

Answer

To increase engine horsepower

Answer

To reduce engine noise

Answer

To cool exhaust gases before release

Question 3

What does the term 'torque' mean in automotive engineering?

Accepted Answer

A rotational force measured in pound-feet or Newton-meters that indicates an engine's ability to do work

Answer

The maximum speed of a vehicle

Answer

The fuel efficiency rating

Answer

The weight distribution of a vehicle

Question 4

What is regenerative braking in hybrid and electric vehicles?

Accepted Answer

A system that converts kinetic energy during braking back into electrical energy stored in the battery

Answer

A type of emergency braking system

Answer

A brake pad material that regenerates over time

Answer

A system that uses compressed air for braking

Question 5

What is the function of a differential in a vehicle drivetrain?

Accepted Answer

To allow the drive wheels to rotate at different speeds during turns while transmitting power from the driveshaft

Answer

To shift between gears automatically

Answer

To connect the engine to the transmission

Answer

To regulate fuel injection timing

Question 6

What is the compression ratio of an engine and why does it matter?

Accepted Answer

The ratio of cylinder volume at BDC to TDC, affecting power output and fuel efficiency

Answer

The ratio of fuel to air in the combustion chamber

Answer

The pressure difference between intake and exhaust

Answer

The ratio of engine displacement to vehicle weight