List three common gases that are heavier than air.
What will be an ideal response?
ANSWER: 1. argon
2. carbon dioxide
3. refrigerant
4. hydrogen chloride
5. methyl ethyl ketone
6. sulfur dioxide
7. butane
8. chlorine
9. ethane
10. hydrogen sulfide
11. nitrogen dioxide
12. propane
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a. positive space c. empty space b. negative space d. unused space
____________ affect the amount of tolerance if the actual size of a feature differs from the MMC or LMC that is specified.
A. Modifiers B. Datums C. Geometric characteristic symbols D. All of the above
A parity bit is used for detecting an error in a code
Indicate whether the statement is true or false
A pure ____ engine is an emission-free piston engine that uses compressed air as its fuel.
A. zero-emission B. air C. hydrogen D. flywheel