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單項選擇題Engine （） refers to the relative time of position of crank, at which each operation during the cycle is commenced and is completed.

A.timing
B.power
C.firing order
D.dead center

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1.單項選擇題Engine （） refers to the relative time of position of crank, at which each operation during the cycle is commenced and is completed.

A.timing
B.deviation
C.firing order
D.phase

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2.單項選擇題Engage the flywheel with the （）.

A.turning gear
B.motor
C.driving gear
D.driven gear

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3.單項選擇題Energy losses due to （） occur in every machine.

A.speed
B.friction
C.impact
D.atmosphere

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4.單項選擇題Emulsion oils and sodium nitrite are both approved additives, but （） cannot be used if any pipes are galvanized or if soldered joints exist.

A.the latter
B.latter
C.former
D.the former

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5.單項選擇題Emulsion oils and sodium nitrite are both approved additives, but the latter cannot be used if any pipes are （） or if any soldered joints exit.

A.chromed
B.welded
C.galvanized
D.bolted

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