Technician A says that the secondary air injection (SAI) system forces air at low pressure into the exhaust to reduce CO and HC exhaust emissions. Technician B says that a check valve is used between the AIR pump and the exhaust manifold to prevent exhaust gases from damaging the AIR pump and valves. Who is right?

A) Technician A only B) Technician B only C) Both A and B D) Neither A nor B


C

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The average soil mixture contains what percentage of air, water, minerals, and organic materials?

A) 45% air, 5% water, 25% mineral matter, and 25% organic material B) 50% air, 15% water, 10% mineral matter, and 25% organic material C) 5% air, 10% water, 50% mineral matter, and 35% organic material D) 25% air, 25% water, 45% mineral matter, and 5% organic material

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If NAFTA were economically integrated, it would imply a common currency

Indicate whether the statement is true or false

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The best place to connect the vacuum gauge is:

A) Vacuum gauge placement is not critical. B) On the system. C) On the vacuum pump. D) On the manifold gauges.

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