[{"id":163128,"question":"Most motorbikes have ____________ cylinder/s engine but cars usually have _________ cylinders on the same crankshaft.","choices":[{"text":"Four , Six","value":"A"},{"text":"One , four","value":"B"},{"text":"two , five","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163126,"question":"No of spark plugs needed in diesel engine is:","choices":[{"text":"Four","value":"A"},{"text":"Five","value":"B"},{"text":"Six","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":163125,"question":"A certain engine coverts 20% of available heat energy into work. Then its efficiency will be:","choices":[{"text":"20%","value":"A"},{"text":"80%","value":"B"},{"text":"50%","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":163124,"question":"Diesel engine coverts ____________ of available heat energy into work.","choices":[{"text":"20% to 25%","value":"A"},{"text":"25% to 30%","value":"B"},{"text":"30% to 35%","value":"C"},{"text":"35% to 40%","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":163122,"question":"Petrol engine coverts ____________ of available heat energy into work.","choices":[{"text":"20% to 25%","value":"A"},{"text":"25% to 30%","value":"B"},{"text":"30% to 35%","value":"C"},{"text":"35% to 40%","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163120,"question":"One degree of thermodynamics scale of temperature is called:","choices":[{"text":"Celsius","value":"A"},{"text":"Fahrenheit","value":"B"},{"text":"Kelvin","value":"C"},{"text":"Radian","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163118,"question":"The efficiency of a practical heat engine:","choices":[{"text":"Can be 100%","value":"A"},{"text":"Can not be 100%","value":"B"},{"text":"Is always Zero","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163116,"question":"Carnot engine is ____________ heat engine.","choices":[{"text":"A reversible","value":"A"},{"text":"An irreversible","value":"B"},{"text":"An ideal","value":"C"},{"text":"Both A and C","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":163114,"question":"If temperature of the sink is decreased, efficiency of a carnot engine.","choices":[{"text":"Remains constant","value":"A"},{"text":"Decreases","value":"B"},{"text":"Increases","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163112,"question":"What will be efficiency of carnot engine when it is operated between the temperatures 47<sup>o</sup>C and 127 <sup>o</sup>C:","choices":[{"text":"Reversible","value":"A"},{"text":"Irreversible","value":"B"},{"text":"Sometimes A and B","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":163107,"question":"The ratio of output work per cycle to input energy per cycle is called:","choices":[{"text":"Entropy","value":"A"},{"text":"Internal energy","value":"B"},{"text":"Efficiency","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163104,"question":"As the working substance of a heat engine completes a cycle, there is no change in:","choices":[{"text":"Internal energy","value":"A"},{"text":"Pressure","value":"B"},{"text":"Volume","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":163103,"question":"The law of thermodynamics which discusses the condition under which heat energy is converted into and equivalent amount of work is:","choices":[{"text":"1st","value":"A"},{"text":"2nd","value":"B"},{"text":"3rd","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163100,"question":"Steam engine is:","choices":[{"text":"An optical system","value":"A"},{"text":"A thermal system","value":"B"},{"text":"A thermodynamic system","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163099,"question":"If the temperature difference between hot and cold body is greater the heat engine is:","choices":[{"text":"Not efficient","value":"A"},{"text":"Less efficient","value":"B"},{"text":"More efficient","value":"C"},{"text":"NOne of above","value":"D"},{"value":"E"}],"correctAnswer":3}]