Mechanic Tests - Diesel Fuel Supply

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1) Technician A says that secondary fuel filters are usually in the range of 5-7 microns. Technician B says that primary fuel filters are usually in the range of 20-25 microns. Who is correct?
2) Technician A says that the primary fuel filter is usually on the suction side of the transfer pump. Technician B says that the secondary fuel filter is usually on the suction side of the transfer pump. Who is correct?
3) How will a diesel engine perform when operating on fuel with a high cetane rating in the summer time?
4) A fuel pressure gauge test on an engine may indicate
5) The primary fuel filter on an engine is on the _____________ side of the fuel pump.