Question:
Power consumption of a refrigerating machine is determined in terms of which of the following units ?
Power consumption of a refrigerating machine is determined in terms of which of the following units ?
Show Hint
- Energy = Power \(\times\) Time (measured in kJ, kcal, or kWh).
- Power = Energy Time (measured in kW or HP).
- Power = Energy Time (measured in kW or HP).
Updated On: Jul 21, 2026
- kW
- kcal
- kJ
- Btu
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Power is defined as the rate at which work is done or energy is consumed over time.
In engineering systems, it is essential to distinguish between units of energy (heat quantity) and units of power (energy rate).
Detailed Explanation:
Let us analyze the units presented in the options:
- kW (Kilowatt): This is the SI unit of power, representing one kilojoule of energy consumed per second:
\[ 1 \text{ kW} = 1 \text{ kJ/s} \] Since power consumption measures the rate of electrical energy consumed by the compressor motor of a refrigeration system, it is measured in kilowatts (kW).
- kJ (Kilojoule): This is a unit of energy, representing work done or heat transferred.
- kcal (Kilocalorie): This is a metric unit of thermal energy, representing the heat required to raise the temperature of 1 kg of water by \(1^{\circ}\text{C}\).
- Btu (British Thermal Unit): This is an Imperial unit of energy, representing the heat required to raise the temperature of 1 pound of water by \(1^{\circ}\text{F}\).
Therefore, kW is the only unit listed that represents power consumption.
Step 2: Final Answer:
The power consumption of a refrigerating machine is determined in terms of kW.
Power is defined as the rate at which work is done or energy is consumed over time.
In engineering systems, it is essential to distinguish between units of energy (heat quantity) and units of power (energy rate).
Detailed Explanation:
Let us analyze the units presented in the options:
- kW (Kilowatt): This is the SI unit of power, representing one kilojoule of energy consumed per second:
\[ 1 \text{ kW} = 1 \text{ kJ/s} \] Since power consumption measures the rate of electrical energy consumed by the compressor motor of a refrigeration system, it is measured in kilowatts (kW).
- kJ (Kilojoule): This is a unit of energy, representing work done or heat transferred.
- kcal (Kilocalorie): This is a metric unit of thermal energy, representing the heat required to raise the temperature of 1 kg of water by \(1^{\circ}\text{C}\).
- Btu (British Thermal Unit): This is an Imperial unit of energy, representing the heat required to raise the temperature of 1 pound of water by \(1^{\circ}\text{F}\).
Therefore, kW is the only unit listed that represents power consumption.
Step 2: Final Answer:
The power consumption of a refrigerating machine is determined in terms of kW.
Was this answer helpful?
0
0
Top ICAR AIEEA Dairy Technology Questions
- As per legal standards (FSSR, 2011), the acidity (%LA) of chakka should not be more than:
- Which of the following food additive is permitted as preservative in paneer?
- Given below are four statements:
Statement (I) : Homogenisation breaks down fat globules in milk into smaller entities.
Statement (II) : Homogenisation breaks down fat globules and casein micelles in milk into smaller entities.
Statement (III) : Homogenisation slightly increases viscosity of milk.
Statement (IV) : Homogenisation improves the appearance of milk.
In light of the above statements, choose the most appropriate answer from the options given below. - With regard to temperature of operation, place the following unit operations in sequence in an increasing order of temperature:
(i) Sterilisation
(ii) Thermisation
(iii) Homogenisation
(iv) Bactofugation and
(v) HTST pasteurization.
Choose the correct answer from the options given below : - “Narampak” and “karapak” refer to varieties of sandesh with reference to which of the following parameters ?
View More Questions
Top ICAR AIEEA Heat Transfer and Unit Operations Questions
- With regard to temperature of operation, place the following unit operations in sequence in an increasing order of temperature:
(i) Sterilisation
(ii) Thermisation
(iii) Homogenisation
(iv) Bactofugation and
(v) HTST pasteurization.
Choose the correct answer from the options given below : - Match List-I with List-II
\begin{tabular{ll} List-I (Name of Process) & List-II (Temperature/time)
(A) Pasteurization & (I) \(60\ ^\circ\text{C}\) no hold
(B) Sterilisation & (II) \(55-60\ ^\circ\text{C}\) no hold
(C) Homogenisation & (III) \(72\ ^\circ\text{C}\) 15 sec
(D) Bactofugation & (IV) \(118\ ^\circ\text{C}\) 15min
Choose the correct answer from the options given below : - In falling film milk evaporator, the temperature difference between milk and steam should be approximately around :
- Indirect UHT treatment can be done using which of the following methods ?
- Which of the following value is related to sterilization process ?
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions