Heavy Duty Medium Trucks – Chapter 8 – Lecture Summary & Practice Questions
The Location on a cam profile that is exactly opposite the toe is referred to as the - ✔✔Heel
on a cam profile described as mostly inner base circle, the profiles between IBC and OBC are
known as - ✔✔ramps
which of the following dimensions would be consistent with a typical engine timing gear
backlash setting - ✔✔0.008" (0.20 mm)
in which direction must a camshaft be rotated on a diesel engine with a crankshaft that is
rotated clockwise - ✔✔either clockwise or counterclockwise depending on the engine
which tool would be required to measure the cam lift of a cylinder block mounted camshaft in
position - ✔✔a dial indicator
a camshaft gear is usually precisely positioned on the camshaft using an - ✔✔key and keyway
when grinding a valve face to remove pitting, the critical specification to monitor during
machining would be the - ✔✔margin
which of the following operating conditions would be more likely to cause a valve float
condition - ✔✔engine overspeed
when grinding a new set of cylinder valve seats, which of the following should be performed
before machining - ✔✔install the valve guides
the reason for using a pair of oppositely wound valve springs is to - ✔✔minimiize valve
dynamic flutter
The Location on a cam profile that is exactly opposite the toe is referred to as the - ✔✔Heel
on a cam profile described as mostly inner base circle, the profiles between IBC and OBC are
known as - ✔✔ramps
which of the following dimensions would be consistent with a typical engine timing gear
backlash setting - ✔✔0.008" (0.20 mm)
in which direction must a camshaft be rotated on a diesel engine with a crankshaft that is
rotated clockwise - ✔✔either clockwise or counterclockwise depending on the engine
which tool would be required to measure the cam lift of a cylinder block mounted camshaft in
position - ✔✔a dial indicator
a camshaft gear is usually precisely positioned on the camshaft using an - ✔✔key and keyway
when grinding a valve face to remove pitting, the critical specification to monitor during
machining would be the - ✔✔margin
which of the following operating conditions would be more likely to cause a valve float
condition - ✔✔engine overspeed
when grinding a new set of cylinder valve seats, which of the following should be performed
before machining - ✔✔install the valve guides
the reason for using a pair of oppositely wound valve springs is to - ✔✔minimiize valve
dynamic flutter
