复习题 词汇与语法

复习题词汇与语法
1、The ______ of piston movement is called TDC (top dead center).
A、upper limit
B、lower limit
C、limit
2、The ______ of piston movement is called BDC (bottom dead center).
A、lower limit
B、upper limit
C、limit
3、A _____ is piston movement from TDC to BDC or from BDC to TDC.
A、stroke
B、stage
C、state
4、The _____ is rotated as the piston is pushed down by the pressure above it.
A、crankshaft
B、crankpin
C、break
5、The actions ______ can be divided into four stages, or strokes.
A、taken place in the engine cylinder
B、taking place in the engine cylinder
C、take place in the engine cylinder
6、In other words, the piston completes a stroke _____ it charges its direction of motion.
A、every time
B、each time
C、each times
7、”Stroke” ______ pis ton movement.
A、refer to
B、refers to
C、prefer to
8、A stroke occurs _______ the piston moves from one limiting position to the other.
A、while
B、when
C、which
9、By the time the piston reaches TDC, the mixture ________ to as little as one-tenth of its
original volume, or over less.
A、had been compressed
B、has been compressed
C、compressed
10、When the air-fuel mixture is compressed, ________ does the pressure in the cylinder go up,
______ the temperature of the mixture_______ increases.
A、not only…but also
B、not only…but and
C、not…but
11、The cylinder pressure ________ as much as 3-5 Mpa or even more.
A、go up
B、increases
C、add
12. But as the higher pressures is called upon to withstand very much greater stresses
higher pressures in cylinders.
A. because
B. because of
C. due to
13. The diesel engine is more efficient, because it higher compression ratio.
A. have
B. has
C. had
14. This advantage prevents the diesel engine replacing the gasoline engine in some
automobiles and airplanes.
A. to
B. for
C. from
15. In any internal combustion engine burning fuel heats air consequently.
A. which
B. that
C. when
16. We all know that diesel engines ( ) work in the same way as gasoline engine do. A. in
principle B. in other words C. in turn
17. Up to 40 per cent of the chemical energy of the burning fuel changed into mechanical
energy.
A. will be
B. would be
C. may be
18. As it were, into waiting charge at the required instant.
A. a
B. an
C. the
19. It has more substantial construction and is thus heavier.
A. to be of
B. to be
C. to be that
20. The same series of events take place again and continue the engine runs.
A. when
B. as
C. as long as
1.What do we see from the paragraphs? ( )
A. What is stroke?
B. What is engine?
C. What is cylinder?
2. Which one Statement is true according the above first paragraph? ( )
A. A four-stroke-cycle engine means that four strokes is required when it finish the whole
cycle.
B. A stroke is not piston movement from TDC to BDC, but from BDC to TD
C.
C. The lower limit of piston movement is called TDC (top dead center).
3. What is BDC in the term of automobile industry? ( )
A. Bottom dead center.
B. Top dead center.
C. Neither of A and B.
4. Which one Statement is TRUE according the last paragraph? ( )
A. The four strokes occur in two crankshaft revolutions.
B. The four strokes occur in four crankshaft revolutions.
C. The four strokes occur in one crankshaft revolutions.
5. Which one Statement is TURE according the article? ( )
A. The four piston strokes are intake, compression, power, and exhaust.
B. The four piston strokes are intake, compression, power, and inhauls.
C. The four piston strokes are intake, combining, power, and exhaust.
1、The mixture is delivered to the engine it is burned.
A where
B which
C who
2、The engine requires a fuel system to supply it a mixture of air and fuel.
A of
B off
C with
3、The motion is carried through the power train to the car wheels so that they rotate and
the car moves .
A rotary
B revolve
C revolution
4、the cylinder pressure to as much as 3－5MPa or even more.
A raise B. increase C. increases
5、In words , the piston completes a stroke each time it changes its direction of motion.
A other
B another
C the other。