- 1 - rγ - 1
- 1 + rγ - 1
- 1 - (1/rγ - 1)
- None of these
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The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when?
Answer: Option 4 Let'
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The efficiency of a Carnot heat engine operating between absolute temperatures T₁ and T₂ (when, T₁ > T₂) is given by (T₁ - T₂)/T₁. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T₁ and T₂ is given by?
Answer: Option 2 Let'
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The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.?
Answer: Option 3 Let'
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The efficiency of a Carnot heat engine operating between absolute temperatures T₁ and T₂ (when, T₁ > T₂) is given by (T₁ - T₂)/T₁. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T₁ and T₂ is given by?
Answer: Option 1 The efficiency of an heat engine is given by \[\mathop \eta \limits^\iota = \frac{{{Q_1} - {Q_2}}}{{{Q_1}}}\] For heat pump it is given by \[\mathop \eta \limits^\iota = \frac{{{Q_1}}}{{{Q_1}...
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The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)?
Answer: Option 3 Let'
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If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Dia. of L.P. cylinder, and D₂ = Dia. of H.P. cylinder)?
Answer: Option 3 If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the...
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The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)?
Answer: Option 1 Let'
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Various efficiencies of a centrifugal pump are related as (where, ηm = mechanical efficiency ηv = volumetric efficiency. ηma = manometric efficiency ηo = overall efficiency)?
Answer: Option 2 Let'
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Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?
Answer: Option 2 Inlet valve closing before bottom dead center would reduce volumetric efficiency of a vertical compression ignition engine. -It should be quite clear that the volumetric efficiency decreases at...
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Highest useful compression ratio (HUCR) is the highest compression ratio at which the?
Answer: Option 4 Highest Useful Compression Ratio (HUCR) is the compression ratio at which a fuel can be used without detonation in a specified test engine under specified operating condition...
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