Question

post-test
what is the purpose of a seat belt pre - tensioner?
a. determines whether restraint systems need to be deployed.
b. helps secure vehicle occupants in the proper position by removing slack in the seat belt.
c. determines if a seat belt is in use, occupant position, distance from airbags, and weight.
d. protects the occupant’s head and torso during side - impact collisions.

Explanation:

A seat - belt pretensioner tightens the seat - belt to remove slack and secure the occupant in place before a collision's full impact. Option A refers to sensors for deploying restraint systems, option C is about seat - belt usage and occupant - related sensors, and option D is about side - impact airbags.

Answer:

B. Helps secure vehicle occupants in the proper position by removing slack in the seat belt.