Question

Poisonous fumes can enter a cab due to:

Answers

A defective exhaust system.

Using the wrong type of fuel.

A lack of oil in the engine.

Explanation

A faulty exhaust system is a serious safety hazard. It may allow poisonous fumes to enter the vehicle's cab or sleeper berth.

This questions appears in the following tests:

Kentucky Class A Knowledge Test

Maryland Class B Knowledge Test

Montana Class B Knowledge Test

North Carolina Class A Knowledge Test

North Carolina Passenger

Oklahoma Passenger

Oregon Class B Knowledge Test

Rhode Island Double

Tennessee Class A Knowledge Test

Vermont Passenger

Washington Class A Knowledge Test

Washington Class A Knowledge Test