Train Driver Braking Systems and Train Dynamics

Question 1

What is the primary braking system used on freight trains in the United States?

Accepted Answer

Pneumatic air brakes

Answer

Hydraulic disc brakes

Answer

Magnetic track brakes

Answer

Regenerative electric brakes

Question 2

What happens when brake pipe pressure drops to zero on a train equipped with standard air brakes?

Accepted Answer

Emergency brakes apply automatically throughout the train

Answer

Brakes release completely

Answer

Brakes partially apply and hold

Answer

The system resets and waits for operator input

Question 3

What is 'dynamic braking' on a diesel-electric locomotive?

Accepted Answer

Using traction motors as generators to create braking resistance

Answer

Applying brakes rapidly during high-speed operations

Answer

A system that automatically adjusts brake pressure based on speed

Answer

Emergency braking using a secondary hydraulic system

Question 4

What is the standard charged brake pipe pressure for freight trains in the United States?

Accepted Answer

90 psi

Answer

70 psi

Answer

80 psi

Answer

110 psi

Question 5

What is a 'penalty brake application'?

Accepted Answer

An automatic emergency brake activation triggered by a safety system

Answer

A fine assessed to operators who apply brakes incorrectly

Answer

A reduced-pressure application used in yard operations

Answer

The gradual pressure reduction used when stopping at a station

Question 6

What does 'independent braking' control on a locomotive?

Accepted Answer

Only the locomotive's brakes, without affecting the rest of the train

Answer

The brakes on trailing locomotive units only

Answer

A backup system separate from the main air brake circuit

Answer

Brakes on a single axle for precision stopping

Question 7

What does the automatic brake handle in a locomotive cab primarily control?

Accepted Answer

Brake pipe pressure for the entire train

Answer

Dynamic braking engagement level

Answer

Independent locomotive brake cylinder pressure

Answer

Parking brake release mechanism