Question:
Which of the following statement is correct for a hermetic type of compressor ?
Which of the following statement is correct for a hermetic type of compressor ?
Show Hint
Hermetic compressors are widely used in domestic refrigerators and small freezers because their sealed design eliminates the risk of refrigerant leaks, making them maintenance-free.
Updated On: Jul 21, 2026
- It prevents the leakage of refrigerant
- Lubrication is complex
- Increases operating noise considerably
- Requires external drive motor
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Refrigeration compressors are classified into open, semi-hermetic, and hermetic types based on how the compressor and its electric motor are enclosed.
Detailed Explanation:
Let us evaluate each statement for a hermetic compressor:
- Option (A): In a hermetic compressor, both the compressor and the driving electric motor are mounted on a common shaft and enclosed within a single, welded steel dome.
This sealed design completely eliminates the need for rotating shaft seals, which are the most common source of refrigerant leaks in open systems.
Therefore, it successfully prevents the leakage of refrigerant. This statement is correct.
- Option (B): The lubrication system is simple and self-contained. The oil sits in a reservoir at the bottom of the sealed housing and is continuously circulated, requiring no external oil pumps. This statement is incorrect.
- Option (C): The sealed steel housing and internal suspension springs help isolate vibrations, making hermetic compressors much quieter than open compressors. This statement is incorrect.
- Option (D): Since the motor is integrated inside the sealed shell, it does not require an external drive motor or pulleys. This statement is incorrect.
Step 2: Final Answer:
The correct statement for a hermetic compressor is that it prevents the leakage of refrigerant.
Refrigeration compressors are classified into open, semi-hermetic, and hermetic types based on how the compressor and its electric motor are enclosed.
Detailed Explanation:
Let us evaluate each statement for a hermetic compressor:
- Option (A): In a hermetic compressor, both the compressor and the driving electric motor are mounted on a common shaft and enclosed within a single, welded steel dome.
This sealed design completely eliminates the need for rotating shaft seals, which are the most common source of refrigerant leaks in open systems.
Therefore, it successfully prevents the leakage of refrigerant. This statement is correct.
- Option (B): The lubrication system is simple and self-contained. The oil sits in a reservoir at the bottom of the sealed housing and is continuously circulated, requiring no external oil pumps. This statement is incorrect.
- Option (C): The sealed steel housing and internal suspension springs help isolate vibrations, making hermetic compressors much quieter than open compressors. This statement is incorrect.
- Option (D): Since the motor is integrated inside the sealed shell, it does not require an external drive motor or pulleys. This statement is incorrect.
Step 2: Final Answer:
The correct statement for a hermetic compressor is that it prevents the leakage of refrigerant.
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