Medium/Heavy Duty Truck Engines, Fuel, & Computerized Management Systems – Chapter 3
Terms – Study Guide & Key Definitions
backfire - correct answer ✔✔Ignition/combustion of the fuel in an oxyacetylene torch in the
torch tip; causes a popping and squealing noise.
compressed air - correct answer ✔✔The means of powering shop tools and truck chassis
equipment in many applications. It is usually pressurized to between 90 and 150 psi, plumbed
throughout a shop or vehicle chassis.
corrosive - correct answer ✔✔Alkaline or acidic substance that dissolves metals and skin tissue.
flammable - correct answer ✔✔Describes any substance that can be combusted.
flashback - correct answer ✔✔A highly dangerous condition that can occur during operation of
oxyacetylene equipment, in which the flame may travel behind the missing chamber in the
torch and explode the acetylene tank using the system oxygen. Most current oxyacetylene
torches are equipped with flashback arresters.
Hazard Communication Regulation - correct answer ✔✔Federal rules from OSHA that
incorporate the Right-to-Know clauses pertaining to workplace hazards.
inflammable - correct answer ✔✔A substance capable of being inflamed or combusted;
describes anything that can be oxidized in a redox reaction.
material safety data sheets (MSDS) - correct answer ✔✔A data information sheet on any known
hazardous substance that must be displayed or provided on request; mandated by WHMIS.
Occupational Safety and Health Administration (OSHA) - correct answer ✔✔US Federal agency
responsible for administering safety in the workplace.
Terms – Study Guide & Key Definitions
backfire - correct answer ✔✔Ignition/combustion of the fuel in an oxyacetylene torch in the
torch tip; causes a popping and squealing noise.
compressed air - correct answer ✔✔The means of powering shop tools and truck chassis
equipment in many applications. It is usually pressurized to between 90 and 150 psi, plumbed
throughout a shop or vehicle chassis.
corrosive - correct answer ✔✔Alkaline or acidic substance that dissolves metals and skin tissue.
flammable - correct answer ✔✔Describes any substance that can be combusted.
flashback - correct answer ✔✔A highly dangerous condition that can occur during operation of
oxyacetylene equipment, in which the flame may travel behind the missing chamber in the
torch and explode the acetylene tank using the system oxygen. Most current oxyacetylene
torches are equipped with flashback arresters.
Hazard Communication Regulation - correct answer ✔✔Federal rules from OSHA that
incorporate the Right-to-Know clauses pertaining to workplace hazards.
inflammable - correct answer ✔✔A substance capable of being inflamed or combusted;
describes anything that can be oxidized in a redox reaction.
material safety data sheets (MSDS) - correct answer ✔✔A data information sheet on any known
hazardous substance that must be displayed or provided on request; mandated by WHMIS.
Occupational Safety and Health Administration (OSHA) - correct answer ✔✔US Federal agency
responsible for administering safety in the workplace.
