MDE 13 End of Unit Quiz

MDE 13 End Of Unit Quiz

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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

B) Allowing excessive fouling and debris to accumulate in the system

D) Treating the system only when visible problems occur

C) Relying solely on automatic dosing systems without manual checks

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Question 5:

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

A) Increased heat transfer efficiency

B) Decreased temperature difference across the cooler

D) Increased coolant temperature at the cooler outlet

C) Improved pressure drop across the cooler

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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

B) To remove air from the cooling system

A) To increase the pressure in the cooling system

D) To mix the coolant with additives

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Question 5:

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

D) Properly functioning pumps

C) Well-maintained gaskets and seals

A) Increased coolant temperature

B) Fouled or dirty cooler surfaces

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Question 4:

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

C) To increase the pressure in the cooling system

A) To regulate the coolant flow based on temperature

B) To clean the coolant

D) To filter out large particles from the coolant

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Question 3:

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

A) A decrease in coolant flow rate

C) Effective heat removal by the cooler

B) An increase in the cooling system pressure

D) A malfunctioning thermostat

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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

A) It can increase the efficiency of heat transfer

D) It can enhance the coolant flow rate

B) It can decrease the temperature difference across the cooler

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Question:

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

B) To increase the rate of coolant circulation and improve overall engine efficiency

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

C) To allow for simultaneous heating and cooling of different sections of the engine

D) To enable the engine to operate at a constant temperature regardless of external conditions

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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

C) Sea Water Strainer

B) Keel Cooler

D) Thermostatic Valve

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Question 4:

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

B) Use high doses of chemicals sporadically

D) Avoid routine checks of chemical levels

C) Allow temperature variations without monitoring

A) Regularly clean the system to prevent buildup of contaminants

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

D) To alter the color of the cooling system

B) To prevent the formation of scale and corrosion

C) To improve the aesthetic appearance of the coolant

A) To increase the flow rate of the coolant

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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

B) To separate oil from the cooling water

D) To filter out debris from the cooling water

A) To increase the temperature of the coolant

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