Question When checking the exhaust system, it should be: Answers Loose. Leaking. Fastened securely. Cracked. Explanation When checking the exhaust system, you should verify that no parts of the system are loose, broken, or missing. This questions appears in the following tests: Alabama Class A Knowledge Test Florida Class B Knowledge Test Illinois Class B Knowledge Test Kansas Class A Knowledge Test Kansas Bus Minnesota Class B Knowledge Test Minnesota Bus Minnesota Passenger New Hampshire Passenger New York Class B Knowledge Test North Carolina Tank North Dakota Tank Oregon Class B Knowledge Test Oregon Passenger Pennsylvania Class A Knowledge Test