MDE Unit 13 cooling systems Flashcards

MDE Unit 13 cooling systems

Question 3:

What impact does a malfunctioning thermostat have on the performance of a diesel engine water cooler?

C) Decreases the effectiveness of temperature regulation

Question 1:

What is the primary purpose of the heat exchanger in a typical diesel engine cooling water system?

C) To transfer heat from the engine coolant to the external cooling medium

Question 3:

Which component of the keel type cooling water system is used to manage the pressure and temperature of the coolant?

A) Expansion Tank

Question 4:

To maintain an effective fresh water cooling system treatment program, it is important to:

A) Regularly clean the system to prevent buildup of contaminants

Question 3:

What does a high temperature drop across the water cooler indicate?

C) Effective heat removal by the cooler

Question 2:

In a keel type cooling water system, which component is used to pump seawater through the keel cooler?

B) Centrifugal Pump

Question:

With reference to main engine cooling water systems, what is the primary purpose of the header tank?

B) To provide a reservoir for excess coolant and maintain system pressure

Question:

With reference to main engine cooling water systems, why might both heaters and coolers be fitted?

A) To adjust the coolant temperature to match the engine's operational requirements and prevent freezing or overheating

Question 5:

What is the impact of low coolant flow rate on the performance of a diesel engine water cooler?

D) Increased coolant temperature at the cooler outlet

Question 4:

Which parameter is essential for evaluating the efficiency of a diesel engine water cooler, in addition to temperature difference?

B) The pressure drop across the cooler

What is the primary function of the inhibitor used in fresh water cooling treatment?

B) To prevent the formation of scale and corrosion

Question 5:

In a keel type cooling water system, which component ensures that the engine's freshwater cooling circuit is effectively isolated from the seawater system?

A) Heat Exchanger

Question:

With reference to main engine cooling water systems, what type of pumps are typically used, and why?

A) Centrifugal pumps - They are preferred for their ability to handle large volumes of water and maintain a steady flow rate with minimal pulsation.

Question 1:

Which of the following is the main component of a keel type cooling water system that helps to dissipate heat from the engine?

B) Keel Cooler

Question 1:

Which of the following is a key condition for the effectiveness of a fresh water cooling system treatment program?

A) Periodic chemical analysis and adjustment of treatment levels

Question 4:

What is the primary purpose of the seawater strainer in a keel type cooling water system?

A) To filter and remove debris from seawater

Question 3:

Which condition contributes to the effectiveness of a fresh water cooling system treatment program?

A) Ensuring the use of treatment chemicals that are compatible with the system

Question 1:

How is the performance of a diesel engine water cooler typically measured?

C) By the temperature difference between the inlet and outlet water

Question 5:

Which maintenance issue could cause a water cooler to exhibit higher pressure drops and reduced performance?

B) Fouled or dirty cooler surfaces

Question 2:

Which condition might result in a water cooler showing a higher-than-normal temperature difference across its inlets and outlets?

C) Blocked cooling water passages

Question 1:

What could be a cause of decreased performance in a diesel engine water cooler?

B) Clogged or fouled cooling passages

Question 2:

What is the function of the header tank in a diesel engine cooling water system?

B) To allow for expansion and contraction of the coolant

Question:

Which of the following safety considerations is most important when handling inhibitors used in cooling systems?

A) Wearing personal protective equipment (PPE) such as gloves and goggles

Question 2:

What is a necessary condition for ensuring proper treatment of a fresh water cooling system?

A) Regular monitoring and maintenance of the system’s temperature

Question 4:

What is the role of the thermostat in a diesel engine cooling water system?

A) To regulate the coolant flow based on temperature

Question 2:

Which instrument is commonly used to measure the temperature difference across a diesel engine water cooler?

D) Thermocouple or temperature sensor

Question 3:

Why are circulation pumps used in a diesel engine cooling water system?

C) To maintain a constant flow of coolant through the engine and heat exchanger

Question 4:

How can an airlock in the cooling system affect the performance of a diesel engine water cooler?

C) It can cause localized overheating and reduced cooling efficiency

Question 5:

What is the purpose of the cooling water pump in a diesel engine cooling water system?

C) To ensure the circulation of cooling water through the engine and heat exchanger
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