Author Question: Two technicians are discussing catalytic converters. Technician A says that the exhaust mixture must ... (Read 112 times)

Charlie · **on:** Aug 13, 2021

Question 1

To prevent catalytic converter damage, do not crank a flooded engine longer than ________ seconds.
◦ 40
◦ 15
◦ 10
◦ 60

Question 2

Two technicians are discussing catalytic converters. Technician A says that the exhaust mixture must fluctuate between rich and lean for the best efficiency. Technician B says that the air-fuel mixture must be leaner than 14.7:1 for best performance from a three-way catalytic converter. Which technician is correct?
◦ Technician A only
◦ Technician B only
◦ Both technicians A and B
◦ Neither technician A nor B