Questions
21
Most high speed compression engines operate on
Answer: Dual combustion cycle
22
Which of the following medium is compressed in a Diesel engine cylinder
Answer: air aione
23
The air-fuel ratio of the petrol engine is controlled by
Answer: carburettor
25
In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of
Answer: 1000°C
28
The term scavenging is generally associated with
Answer: high efficiency engines
29
The cam shaft of a four stroke I.C. engine running at 1500 rmp will run at
Answer: 750 rpm
31
A diesel engine as compared to petrol engine (both running ar rated load) is
Answer: more efficient
33
Which of the following is false statement. Some of the methods used to reduce diesel smoke are as follows
Answer: increasing the compression ratio
34
Pick up the wrong statement about supercharging
Answer: supercharging results in fuel economy
35
The operation of forcing additional air under pressure in the engine cylinder is known as
Answer: supercharging
36
The minimum cranking speed in case of petrol engine is about
Answer: 60-80 rpm
37
The mean effective pressure obtained from engine indicator indicates the
Answer: average pressure
38
Installation of supercharger on a four-cycle diesel engine can result in the following percentage increase in power
Answer: upto 100%
39
Which of the following is the lightest and most volatile liquid fuel
Answer: gasoline
40
Air fuel ratio for idling speed of a petrol engine is approximately
Answer: 10:1
