Question

after applying the required number of handbrakes on a train which has been parked on a steep grade, the PROPER test of whether the handbrakes will hold the train is to

Answer 1

The proper test to determine if the handbrakes will hold a train parked on a steep grade is a roll test.

Step-by-step explanation:

The PROPER test of whether the handbrakes will hold the train after applying the required number of handbrakes on a steep grade is to perform a roll test. In a roll test, the train is released on the grade and observed to see if it remains stationary.