Technician A says that breathable air used for air supply respirators must be class A air. Technician B says that breathable air used for air supply respirators must be class D air. Who is correct?

A. Technician A only
B. Technician B only
C. Both Technicians A and B
D. Neither Technician A nor B


B. Technician B only

Trades & Technology

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Cold engines require more power to crank over and start than warm engines.

Answer the following statement true (T) or false (F)

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Technician A says oily rags must be stored in a labeled and sealed metal container. Technician B says water on the shop floor could present an electric shock hazard. Who is correct?

A. A only B. B only C. Both A and B D. Neither A nor B

Trades & Technology

To keep brickmaking and bricklaying secrets confined to their own groups, early masons _____ .

A. allowed only family members to join the trade B. patented their trade secrets C. required student to pay for the right to learn the secrets D. banded together in organizations called guilds

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Fuses must be plainly marked (by printing on or a label attached to the fuse barrel), showing the following: (1) ampere rating, (2) voltage rating, (3) ____, (4) "current-limiting" where applicable, and (5) the name or trademark of the manufacturer.

A. material capacity B. interrupting rating if other than 10,000 amperes C. date of manufacture D. interrupting rating if other than 1,000 amperes

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