Explain the difference between a drill and a ream.
What will be an ideal response?
A drill cuts new holes or enlarges existing holes in material. A reamer is used to enlarge or finish a hole that has been drilled, cored or bored.
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Cylinder heads are being discussed. Technician A says porting is when the size of a passageway is altered. Technician B says polishing smoothes the surface of the port. Who is right?
A. Technician A B. Technician B C. Both technicians D. Neither technician
List the common water skier’s hand signals
What will be an ideal response?
How is an outdoor thermostat used in a dual-fuel heat pump system?
A) The outdoor thermostat prevents the heat pump from operating above the balance point. B) The outdoor thermostat prevents the furnace from operating above the balance point. C) The outdoor thermostat prevents the heat pump from defrosting above the balance point. D) The outdoor thermostat prevents the electric strip heat from operating above the balance point.
Why is exhaust gas recirculation (EGR) used?
A. To meet emissions standards. B. To increase fuel efficiency. C. To regulate charge air temperature. D. To increase engine horsepower.