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BARC 2021 ME: IC Engine + Power Plant : Nuclear Quiz 2

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Question 1

The efficiency of the binary vapour cycle with Topping and bottom cycle having efficiency 30% and 40% respectively is

Question 2

Air is compressed 16 times that its volume during compression in a diesel cycle.If the cutoff ratio is 4 Find the cycle efficiency (%).

Question 3

The cycle generally used for petrol engine is:

Question 4

The compression ratio for diesel engines lies in the range of _______.

Question 5

Fuel consumption of a diesel engine is 10 gm/sec when the power output is 160 kW. If the mechanical efficiency is 75%, then the indicated specific fuel consumption is ____ kg/kWh.

Question 6

The maximum net work output in Brayton cycle is given as____.

Question 7

Assertion (A): The pressure compounded impulse steam turbine is the most efficient type of impulse turbine.
Reason (R): It is because the ratio of blade velocity to steam velocity remains constant

Question 8

Consider the following statements:
For a velocity-compounded impulse steam turbine stage having two rows of moving blades
1) The work done in each row of moving blades is equal.
2) The efficiency of a velocity-compounded turbine is less than that of a pressure-compounded turbine.
3) The velocity-compounded turbine is often used in the first stage of a multi-stage impulse turbine.
Which of these statements is/are correct?

Question 9

A large engine speed will result in decreased in knocking in_____.

Question 10

The pressure ratio in Brayton cycle corresponding to maximum efficiency is 64 . The pressure ratio for maximum net work output is
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Aug 21ESE & GATE ME