IN ANSWERING QUESTION 417, REFER TO
FIGURE 4A.
417.
The digits in the firing order of
an engine are the cylinder numbers.
If the firing order of the engine
of figure 4A is 1423, in which
order do the cylinders fire?
1.
A, B, C, D
2.
A, c, B, D
3.
A, D, B, C
4.
A, D, C, B
418.
How does the camshaft actuate the
intake and exhaust valves of an
Lhead engine?
1.
By tappets from a position
above the valves
2.
By tappets from a position
below the valves
3.
By tappets, pushrods, and
rocker arms from a position
above the valves
4.
By tappets, pushrods, and
rocker arms from a position
below the valves
419.
Which of the following is NOT
considered to be a stationary part
of an engine?
1.
The piston assembly
2.
The cylinder block
3.
The crankcase
4.
The cylinder head
4-20.
Cylinder sleeves for the blocks of
gasoline and diesel engines are
used for which of the following
purposes?
1.
To decrease the wear of the
cylinder blocks
2.
10 strengthen the cylinder
blocks
3.
To help enclose the heat in the
cylinder blocks
4.
To help make a seal to contain
the oil within the cylinder
blocks
421.
The curved surface of the pockets
in which the valves of an Lhead
cylinder head function are designed
for which of the following
purposes?
1.
To shorten the compression
stroke
2.
To lengthen the compression
stroke
3.
To decrease the turbulence of
the airfuel mixture
4.
To increase the turbulence of
the airfuel mixture
422.
Which of the following components
supports and encloses the
crankshaft and provides a reservoir
for the lubricating oil?
1.
The cylinder head
2.
The exhaust manifold
3.
The intake manifold
4.
The crankcase
4-23.
The waste products of combustion
are carried from the cylinders
through which of the following
means?
1.
The intake manifold
2.
The exhaust manifold
3.
The cylinder head
4.
The cylinder block
35