Why must flat-bottom lifter camshafts be broken in at a fast idle?
A) The cam in a cam-in-block engine is only lubricated by splash oil
B) The flat-bottom of the lifters must become slightly concave in order to rotate
C) Both A and B are correct
D) Neither A nor B are correct
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The surface finish for the cylinder walls usually depends on ________.
A) The type of piston rings to be used
B) The type of engine oil that is going to be used in the engine
C) The cylinder wall-to-piston clearance
D) Both B and C
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Umbrella-type valve stem seals ________.
A) Fit on the valve face to prevent combustion leaks B) Lock under the valve retainer
C) Fit tightly onto the valve stem D) Fit tightly onto the valve guide
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With the rocker cover (valve cover) removed, the technician can inspect all items EXCEPT ________.
A) Camshaft (overhead camshaft engine only)
B) Combustion chamber deposits
C) Valve stems and pushrods (overhead valve engines only)
D) Rocker arms and valve spring
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Hearing protection should be worn any time the noise level exceeds ________.
A) 60 dB B) 90 dB C) 80 dB D) 70 dB
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Batteries should not be tipped to more than a ________ angle.
A) 45 degree B) 5 degree C) 60 degree D) None of these
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Early engines were called flat head designs because they ________.
A) Did not include valves B) Used valves located in the cylinder block
C) Used spark plugs at the top of the cylinders D) Were only inline engines
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GMLAN is the General Motors term for which type of module communication?
A) Keyword 2000 B) UART C) High-speed CAN D) Class 2
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Technician A says that in a parallel hybrid design, only the electric motor is connected to the transmission. Technician B says that in a parallel hybrid design, the vehicle can be propelled by the electric traction motor, the internal combustion engine, or both. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
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