Practice question

A school bus stepwell/entrance heater is cold while other heaters work. What is the most likely cause?

  1. A blown brake light bulb
  2. A closed or failed shutoff valve, airlock, or restricted hose in the stepwell heater branch
  3. A dirty windshield
  4. A loose seat bolt

Answer: B — A closed or failed shutoff valve, airlock, or restricted hose in the stepwell heater branch

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: ASE S1 Body Systems & Special Equipment (School Bus) Practice Questions - ASE S1 - Body Systems & Special Equipment (School Bus) Certification Exam →