- Vapor compression cycle using expansion valve
- Air refrigeration cycle
- Vapor compression cycle using expansion engine
- Carnot refrigeration cycle
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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 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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Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)?
Answer: Option 1 Fourier's law of heat conduction is k. A. (dT/dx) where Q = Amount of heat flow through the body in unit time, A = Surface area of heat...
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Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface)?
Answer: Option 2 Let'
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Direction : Two statements I and II are given. These statement may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statements. Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements. Mark answer : I. The performance of Indian sports persons in the recently held Olympics could not reach the level of expectation the country had on them. II. The performance of Indian sports person in the last Asian games was far better than any previous games.?
Answer: Option 5 Both the statements are effects of some common cause.
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Which of the following has the minimum value of COP for a given refrigeration effect?
Answer: Option 4 Let'
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Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?
Answer: Option 1 Air cycle has minimum coefficient of performance.
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The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.?
Answer: Option 4 COP of refrigerating system $$ = \frac{{{\text{heat taken from the low temperature reserviour}}}}{{{\text{work supplied}}}}$$ So, we can say there are no units for COP because the heat taken...
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Out of the following refrigeration cycles, which one has maximum COP?
Answer: Option 2 Carnot cycle is an theoretical cycle designed to use as an reference cycle it will have maximum COP since all the steps involved during the cycle are...
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