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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 × Vc J, where Vc 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.
Disregarding the pump work, the cycle efficiency (in percentage) is
Disregarding the pump work, the cycle efficiency (in percentage) is
Question 10
An air standard Otto cycle consists of:
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Aug 22ESE & GATE ME