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4.
In-Line engine cylinders … in a straight line, one behind the other along
the length of the crankshaft.
A. are positioned
C. was positioned
B. is positioned
D. am positioned
5.
Engines of two different cylinder arrangements… as W-type engines in the
technical literature.
A. are classified
C. has been classified
B. is classified
D. was classified
6.
Air and fuel … to facilitate the combustion process in carburetted engines.
A. is mixed B. are mixed C. am mixed D. has been mixed
7.
Injectors … in combustion chambers with injection directly into cylinders
in gasoline direct injection engines.
A. is mounted
C. am mounted
B. has been mounted
D. are mounted
8.
Fuel … into the main combustion chamber in direct injection engines.
A. have been injected
C. are injected
B. is injected
D. were injected
9.
Well-mixed fuel and oxidizer (typically, air) … to the point of auto-igni-
tion in homogeneous charge compression ignition engines.
A. is compressed
C. are compressed
B. has been compressed
D. was compressed
10.
Different kinds of fuel … in engines.
A. has been used
C. is used
B. are used
D. was used
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