The percentage of the energy in the petrol burnt in the engine which is actually utilized in propelling the car is as little as
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Automobile Engineering · all questionsPerformance and Testing of Engines
Performance and Testing of Engines
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Mechanical efficiency of an automobile engine usually varies in the range:
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The thermal efficiency of an air standard diesel cycle having fixed compression ratio, with increase in cut-off will:
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How many times in a minute does each valve on a 4-stroke engine running at 2000 rpm open and close?
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If the fuel consumption of 4-stroke IC engine is 0.1 kg/min and calorific value of fuel used is 40,000 kJ/kg, then the amount of energy supplied per minute is . . . . . . . .
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Which of the following is under performance test?
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A Laboratory test bed consists of-
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The tractive effort of an automobile is the force required to move the
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In a four stroke engine, we get one power stroke in
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Stalling of S. I. engine after high speed driving can be caused by
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Valve overlap is the number of degrees of crankshaft rotation during which:
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Volumetric efficiency is a measure of
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The total vehicle resistance is the sum of air resistance, rolling resistance and gradient resistance.
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The mean effective pressure of diesel cycle having fixed compression ratio will increase if cut-off ratio
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The tractive effort is . . . . . . . . proportional to speed of the vehicle, when the power is constant.
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Torqueproduced by the Auto Engine at 4000 r.p.m. is 4 N-m. Torque that can be produced by the same engine at 6000 r.p.m. is
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The net work per cycle done by the piston on the cylinder gases during the inlet and exhaust stroke is called as
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To measure Brake Power of the Auto Engines following device is used.
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Increase of torque in a vehicle is obtained by . . . . . . . .
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In Multi cylinderAuto Engines, heat converted into useful work is about
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