EVOC Emergency Vehicle Dynamics & Physics 2

Question 1

During hard emergency braking, vehicle weight transfers to which end of the vehicle?

Accepted Answer

The front axle

Answer

The rear axle

Answer

Evenly across all four wheels

Answer

The uphill side on banked roads

Question 2

What is 'understeer' in vehicle dynamics?

Accepted Answer

When front wheels lose traction and the vehicle plows straight despite steering input

Answer

When rear wheels lose traction and the tail slides outward

Answer

When the vehicle rolls to one side during a sharp corner

Answer

When braking force is greater at the rear than the front

Question 3

What is 'oversteer' in vehicle dynamics?

Accepted Answer

When the rear of the vehicle slides outward during a turn

Answer

When the front wheels lose traction and the vehicle understeers

Answer

When the vehicle requires excessive steering input at low speeds

Answer

When the vehicle rolls toward the outside of a curve

Question 4

During rapid acceleration from a stop, vehicle weight transfers to which axle?

Accepted Answer

Rear axle

Answer

Front axle

Answer

Evenly to both axles simultaneously

Answer

Whichever axle has the most traction

Question 5

How does a higher center of gravity affect rollover risk in an emergency vehicle?

Accepted Answer

Significantly increases rollover risk, especially during sharp turns

Answer

Reduces rollover risk by lowering the vehicle's effective mass

Answer

Has no effect unless the vehicle is on a banked surface

Answer

Only increases rollover risk when exceeding posted speed limits

Question 6

Why is understanding weight transfer important for emergency vehicle operators?

Accepted Answer

To predict handling changes and maintain control during acceleration, braking, and cornering

Answer

To calculate maximum legal cargo weight for DOT compliance

Answer

To determine the proper tire pressure for different load conditions

Answer

To comply with weight distribution requirements on bridges

Question 7

What is 'threshold braking'?

Accepted Answer

Applying maximum brake pressure just below the wheel lockup point

Answer

Pumping brakes at one-second intervals to prevent lockup

Answer

Gradually increasing brake pressure over a 5-second period

Answer

Applying and releasing brakes alternately every half second