Question

A four-cylinder, four-stroke, 2.2-L gasoline engine
operates on the Otto cycle with a compression ratio of 10. The
air is at 100 kPa and 60°C at the beginning of the compression
process, and the maximum pressure in the cycle is
8 MPa. The compression and expansion processes may bemodeled as polytropic with a polytropic constant of 1.3. Using
constant specific heats at 850 K, determine
(a) the temperature
at the end of the expansion process,
(b) the net work output and the thermal efficiency,
(c) the mean effective pressure,

Answer 1

Answer:

1The fact that the tiger is ‘stalking the length of his cage’ tells us that he is

a) restless.

b) reckless.

c) resilient.

d) reverent.When the writer says, ‘Baking was indeed a profitable profession in the old days.’, he means

that

a) baking isn’t as popular in Goa currently.

b) bakers have chosen to adopt other professions.

c) baking, as a job, isn’t as gainful as it used to be.

d) bakers’ goods were of a better quality in earlier times.