Bihar SBTE Diploma Mechanical 4th SEM May 2019 Paper on Thermal Engineering II
| Sr. No. | Questions with options |
| 1 | The value of an extensive property is essentially dependent on
(a) Mass of the system (b) Interaction of system with its surroundings (c) Path followed by the system in going from one state to another (d) Nature of boundaries, rigid or flexible |
| 2 | All of the following are intensive properties of system except
(a) Viscosity (b) Temperature (c) Density (d) Potential energy |
| 3 | Choose the specific property of a thermodynamic system
(a) Viscosity (b) Density (c) Pressure (d) Temperature |
| 4 | Two blocks which are at different states are brought in to contact with each other and allowed to reach a final state of Thermal equilibrium, is called
(a) Zeroth law (b) First law (c) Second law (d) Third law |
| 5 | In thermodynamic analysis, a pure substance is that which
(a) Has no dissolves impurities (b) Consists of only a single species (c) May have a number of chemical species but the composion remains constant (d) Behaves as a perfect gas |
| 6 | First law of thermodynamic refers to conservation of
(a) Mass (b) Energy (c) Force (d) Momentum |
| 7 | Heat transfer in liquids and gases is essentially due to
(a) Conduction (b) Convection (c) Radiation (d) Conduction and radiation put together |
| 8 | A satellite in space exchanges heat with surroundings essentially by
(a) Conduction (b) Convection (c) Radiation (d) Conduction and convection both |
| 9 | In an impulse turbine
(a) The steam is expanded in nozzle only and then is a pressure drop and heat drop (b) The steam is expanded in fixed and moving blades continuously (c) The steam is expanded in moving blades only (d) The pressure and temperature of steam remains constant |
| 10 | The Parson’s reaction turbine has
(a) Only moving blades (b) Only fixed blades (c) Identical fixed and moving blades (d) Fixed and moving blades of different shape |
| 11 | A condenser in a steam power plant
(a) Increases expansion ratio of steam (b) Reduces back pressure of steam (c) Reduces temperature of exhaust steam (d) All of the above |
| 12 | The temperature of condensate on leaving the condenser compared with circulating water at in let is
(a) Lower (b) Higher (c) Unpredicted (d) All of the above |
| 13 | Fourier’s law of heat transfer is used in
(a) Convection (b) Conduction (c) Radiation (d) None of these |
| 14 | Which of the following is a water tube boiler
(a) Lancashire boiler (b) Babcock and Wilcox boiler (c) Locomotive boiler (d) Cochran boiler |
| 15 | An air preheater
(a) Increases evaporative capacity of the boiler (b) Increases the efficiency of the boiler (c) Enable low grade fuel to be used (d) All of the above |
| 16 | The difference of super saturated temperature and saturation temperature at that pressure is known as
(a) Degree of super saturation (b) Degree of super heat (c) Degree of under cooling (d) None of these |
| 17 | During a refrigeration cycle heat is rejected by the refrigerant into a
(a) Compressor (b) Condenser (c) Evaporator (d) Expansion valve |
| 18 | Dryness fraction of dry steam is
(a) 3 (b) 2 (c) 1 (d) 0 |
| 19 | Which one is NOT renewable sources of energy
(a) Solar water heater (b) Wind energy (c) Tidal energy (d) Energy produced by coal |
| 20 | If OP be pressure, V be volume of a perfect gas, then PV=C is ;
(a) Boyle’s law (b) Charle’s law (c) Pascal law (d) None of these |
| Data Collected By – Rashmi | |
| Published On – 29th May 2022 | |
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