Safety Procedures & Tool Usage Flashcards

When opening a hot engine's cooling system, what is the correct procedure?

Answer: Allow the engine to cool, then slowly turn the cap to release pressure

Hot pressurized coolant can erupt and cause severe burns, so the system must cool and be depressurized slowly.

What is the main danger of carbon monoxide in a shop?

Answer: It is colorless and odorless and can cause poisoning or death

CO is undetectable by the senses and binds to hemoglobin, so engines must run with exhaust extraction.

Which tool is used to measure crankshaft journal diameter to within 0.0001 inch?

Answer: Outside micrometer

An outside micrometer measures external diameters precisely, with vernier models reading to 0.0001 inch.

When using compressed air to clean parts, OSHA limits nozzle pressure to what maximum when dead-ended?

Answer: 30 psi

OSHA 1910.242(b) limits cleaning air to under 30 psi when dead-ended, with chip guarding.

What should be used when cleaning brake dust from drum brakes to avoid asbestos exposure?

Answer: A low-pressure wet cleaning system or HEPA vacuum

OSHA requires wet methods or HEPA vacuum enclosures so brake dust fibers do not become airborne.

Which type of safety glasses marking indicates they meet impact standards?

Answer: ANSI Z87.1 (Z87+)

ANSI Z87.1 sets eye-protection impact standards, with Z87+ indicating high-impact rating.

When using a gear puller, what safety step is recommended?

Answer: Ensure jaws are fully seated and wear eye protection since parts can release suddenly

Parts under puller tension can release violently, so secure jaws and eye protection prevent injury.