In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency. Increase Decrease Not effected None of these TRUE ANSWER : ? YOUR ANSWER : ?
The working pressure and temperature inside the cylinder of an internal combustion engine is _________ as compared to a steam engine. Low High Very high Very low TRUE ANSWER : ? YOUR ANSWER : ?
A 5 BHP engine running at full load would consume diesel of the order of 3 kg/hr 0.3 kg/hr 5 kg/hr 1 kg/hr TRUE ANSWER : ? YOUR ANSWER : ?
If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by (V₀/V₁)/ [1 + (V₀/V₁)²] [2(V₀/V₁)]/ [1 + (V₀/V₁)²] V₁/(V₀ + V₁) V₀/(V₀ + V₁) TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of the brake power to the indicated power is called Overall efficiency Mechanical efficiency Indicated thermal efficiency Volumetric efficiency TRUE ANSWER : ? YOUR ANSWER : ?
Alpha-methyl-naphthalene (<math xmlns="http://www.w3.org/1998/Math/MathML" class="wrs_chemistry"><msub><mi>C</mi><mn>11</mn></msub><msub><mi>H</mi><mn>10</mn></msub></math>) has a cetane number of 0 120 50 100 TRUE ANSWER : ? YOUR ANSWER : ?
When crude oil is heated, then which of the following hydrocarbon is given off first? Kerosene Natural gas Gasoline Paraffin TRUE ANSWER : ? YOUR ANSWER : ?
In a four stroke cycle petrol engine, the charge is ignited at 30° before top dead center 30° after bottom dead center 30° after top dead center 30° before bottom dead center TRUE ANSWER : ? YOUR ANSWER : ?
Volatility of diesel fuel oil is Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame Temperature at which it solidifies or congeals Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off It catches fire without external aid TRUE ANSWER : ? YOUR ANSWER : ?
As a result of detonation in an I.C. engine, following parameter attains very high value Peak temperature Rate of rise of temperature Rate of rise of pressure Peak pressure TRUE ANSWER : ? YOUR ANSWER : ?