Objective Questions Mark Select the correct answer 1. Cut-off ratio is related to
[7 marks]Carnot cycle (b) Otto cycle (c) Diesel cycle (d) Rankine cycle 2. The Universal gas Constant is equal to
[ marks]M/R (b) R/M (c) M*R (d) All of the above 3. The law PV= Cis related to process which is
[ marks]Adiabatic (b) Isobaric (c) Isochoric (d) Isothermal 4. Dryness fraction(x) of superheated steam is
[ marks]equal to 0 (b) greater than 1 (c) less than 1 (d) equal to 5. The unit of pressure is
[ marks]Pascal (b) N/m2 (c) bar (d) all of the above 6. The compression ratio for Diesel engine is in the following range:
[ marks]12 to 22 (b) 5 to 10 (c) 10 to 12 (d) None of the above 7. The sealing ring for pressure cooker is made from
[ marks]Leather (b) Rubber (c) Plastic (d) Aluminum
[ marks]Define the following terms: 1. Elasticity 2. Hardness 3. Boiling point 4. Melting point 5. Prime mover 6. One ton refrigeration 7. Open system
Differentiate between Brake and Clutch
[3 marks]Write a short note on: Engineering materials
[4 marks]Explain with neat sketch the working of belt drives and gear drives
Compare petrol engines with diesel engines.
[3 marks]Write a short note on ”Wind Energy”.1
[4 marks]Draw air standard Otto cycle on p-Vand T-s diagrams. Derive its efficiency equation with usual notations.
Classify the compressors.
[3 marks]Write a short note on: Split air conditioner
[4 marks]Explain with neat sketch construction and working of Centrifugal pump.
List the boiler mountings and accessories.
[3 marks]Draw neat and labeled diagram of Cochran Boiler
[4 marks]With neat sketch explain the construction and working of (1) Fusible plug (2) Pressure gauge
Prove that C – C = Rwith usual notations. p v
[3 marks]Write a short note on: Throttling calorimeter
[4 marks]Calculate the total amount of heat required to produce 5 kg of steam at a pressure of 5 bar and temperature of 250 °Cfrom the water at 25 °C. Take specific heat of steam = 2.1 kJ/kg-K. and the specific heat of water = 4.187 kJ/kg-K.
Explain the terms: Sensible heat, Latent heat and Super heat
[3 marks]Write a statement of zeroth, first, second law ofThermodynamic.
[4 marks]The following readings were recorded during the test on single cylinder four stroke diesel engine. (1)Cylinder diameter = 300 mm (2) Stroke length = 450 mm (3) Mean effective pressure = 6 bar (4) Speed of engine = 300 r.p.m. (5) Net brake load = 1500 N (6) Effective brake drum diameter = 1.8m. Calculate: (1) Indicated Power (2) Brake Power (3) Mechanical efficiency.
