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# BARC 2021 ME: Subject Revision Quiz 5

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Question 1

The Laplace transform of where is

Question 2

Which of the following boiler accessories utilizes the waste heat of flue gases to heat the feed water?

Question 3

Match List I (Statement) with List II (Its Reason)and select the correct answer using the code given below the Lists:

Question 4

The eigenvalue of a symmetric matrix are all

Question 5

In the operation of four-stroke diesel engines, the term ‘squish’ refers to the ________.

Question 6

is equal to

Question 7

Given the ordinary differential equation

with and the value of is _________ (correct to two decimal places).

Question 8

Air inhalation rate of a diesel cycle is 300kg/hr with temperature and pressure 15 degree Celsius and 1.03 bar. If volumetric efficiency is 72.3%, find the swept volume flow rate.( in m3/s)

Question 9

A 4-Stroke petrol engine at full load delivers 60 kW. It requires 8.5 kW to rotate it without load at the same speed.Its mechanical efficiency at full load, half load and quarter load will be respectively

Question 10

The order and degree of differential eqn y''' = y are respectively

Question 11

If then y (2) = ____________.

Question 12

The diameter of bore and stroke length of a 1 cylinder , 4- stroke engine is 0.5m and 2m.The engine is running at 250 rpm. Calculate the stroke volume flow rate in

Question 13

A fair coin is tossed till a head appears for the first time. The probability that the number of required tosses is odd, is

Question 14

Two coins are tossed simultaneously. The probability (upto two decimal points accuracy) of getting at least one head is _______

Question 15

If then div at

Question 16

The discharge of hydrocarbons from petrol automobile exhaust is minimum when the vehicle is _______.

Question 17

The inlet condition of a Brayton cycle with perfect regenerator (heat exchanger) is 100 Kpa and 300 K. If the temperature at the end of expansion is 600 K and higher pressure is 200 Kpa. Find the amount of heat exchange by the regenerator (in KJ/kg) _________.

Question 18

The value of is

Question 19

In the Rankine cycle for a steam power plant the turbine entry and exit enthalpies are 2803 kJ/kg and 1800 kJ/kg, respectively. The enthalpies of water at pump entry and exit are 121 kJ/kg and 124 kJ/kg, respectively. The specific steam consumption (in kg/k W.h) of the cycle is _______

Question 20

A gas turbine power plant operates on the Brayton cycle between Tmin = 300 K and Tmax = 1200 K. The ratio of maximum cycle efficiency of Brayton cycle to the efficiency of Carnot cycle, operating between the same two temperatures is __________.
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