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BARC 2021 ME: IC Engine + Power Plant : Nuclear Quiz 3

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Question 1

A single cylinder two stroke engine working on otto cycle and running at 60 rps have volumetric efficiency 100%, and volume flow rate of air is 0.00127 m³/s. If the diameter of bore and length of stroke are equal then the diameter of the piston (in cm) is

Question 2

A steam power plant operating on ideal regenerative Rankine cycle employs saturated steam at 800 K and 13.5 MPa pressure at inlet to the turbine. If the condensing temperature is 350K, calculate the efficiency of the plant.

Question 3

Match List I (Power Cycle) with List II (Efficiency Value) and select the correct answer using the code given below the Lists:

Question 4

An example of a water tube boiler is a:

Question 5

In a spark ignition engine working on the ideal Otto cycle, the compression ratio is 5.5. The work output per cycle (i.e., area of the P-V diagram) is equal to 23.625 × 10⁵ × V_cJ, where V_c is the clearance volume in m³. The indicated mean effective pressure is

Question 6

A small steam whistle (perfectly insulated and doing no shaft work) causes a drop of 0.8 kJ/kg in the enthalpy of steam from entry to exit. If the kinetic energy of the steam at entry is negligible, the velocity of the steam at exit is

Question 7

Calculate the air-std efficiency of the engine working on ideal Otto cycle the temperature at the beginning and end of compression are 55ºC and 373ºC.if γ= 1.4

Question 8

Calculate the air-standard efficiency of a Diesel engine having a clearance volume of 1420 cc, bore & stroke of the cylinder as 225 mm & 375 mm respectively, with the cut-off of fuel occurring at 6% of the stroke. (Take γ = 1.4 for air).

Question 9

An ideal reheat Rankine cycle operates between the pressure limits of 10 kPa and 8 MPa, with reheat being done at 4 MPa. The temperature of steam at the inlets of both turbines is 500 °C and the enthalpy of steam is 3185 kJ/kg at the exit of the high pressure turbine and 2247 kJ/kg at the exit of low pressure turbine. The enthalpy of water at the exit from the pump is 191 kJ/kg. Use the following table for relevant data.

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Disregarding the pump work, the cycle efficiency (in percentage) is

Question 10

An air standard Otto cycle consists of:

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ESE & GATE ME Thermodynamics

Aug 22ESE & GATE ME