| A-1 Engine Repair Certification Practice Test | |
|---|---|
11. Technician A says that minor scoring on the surface of a flywheel can be removed during resurfacing. Technician B says if the ring gear on a flywheel shows excessive wear it may be removed and replaced. Who is correct? |
16. Technician A says the valves in an interference engine open further into the combustion chamber that than those of a non-interference engine. Technician B says if the timing belt were to break in an interference engine due to a seized bearing or water pump, damage to the valves or pistons may occur. Who is correct? |
12. A vehicle briefly blows bluish/gray smoke from the tailpipe only when first started in the mourning. The most likely cause of this condition is: |
17. Technician A says a flex fan will increase its pitch at higher engine speeds. Technician B says a viscous fan clutch contains a silcon based fluid and should be checked for leaks.
Who is correct? |
13. Technician A says an engines main bearing insert has a hole that must align with the matching bores oil supply hole. Technician B says that crankshaft bore alignment can be checked with a feeler gauge and a straightedge. Who is correct? |
18. Two technicians are discussing the ECT (Engine Coolant Temperature) sensor. Technician A says the performance of this sensor has no effect on engine timing. Technician B says this sensor will effect the engines fuel mixture. Who is correct? |
14. Technician A says to use an outside micrometer to measure the diameter of a camshaft journal. Technician B says a camshaft spins twice for every revolution of the crankshaft. Who is correct? |
19. A spark plug is removed and compressed shop air is introduced to the #1 cylinder while at TDC. Bubbles are seen coming out of the radiator neck. The most likely cause is: |
15. Two technicians are discussing hydraulic lifter preload. Technician A says excessive preload will cause high manifold vacuum. Technician B says insufficient preload will cause excessive valve train noise. Who is correct? |
20. A vehicle has a clogged catalytic converter. The least likely cause of this is. |
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