MDE 13 End of Unit Quiz

MDE 13 End Of Unit Quiz

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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

B) Ensuring inhibitors are mixed with the fuel before use

C) Storing inhibitors in an open container to facilitate ventilation

D) Ignoring the manufacturer's instructions for handling and storage

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Question 2:

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

C) Thermostatic Valve

B) Centrifugal Pump

A) Expansion Tank

D) Freshwater Pump

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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

B) To maintain pressure in the cooling system

D) To remove impurities from the coolant

A) To mix coolant with additives

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Question 3:

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

C) Effective heat removal by the cooler

A) A decrease in coolant flow rate

B) An increase in the cooling system pressure

D) A malfunctioning thermostat

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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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Question:

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

B) Gear pumps - They are used for their high-pressure capability but are less common in cooling systems due to their tendency to handle smaller volumes.

C) Diaphragm pumps - They are selected for their ability to handle viscous fluids but are not ideal for cooling water systems due to their limited flow capacity.

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

D) Peristaltic pumps - They are used for their precision in metering fluids but are not suitable for large-scale cooling systems due to their low flow rates.

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Question 3:

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

C) Relying solely on automatic dosing systems without manual checks

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

D) Treating the system only when visible problems occur

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

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Question 1:

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

D) To filter out debris from the cooling water

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

A) To increase the temperature of the coolant

B) To separate oil from the cooling water

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Question 3:

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

B) Increases the temperature drop across the cooler

A) Improves coolant flow rate

D) Enhances the heat exchange process

C) Decreases the effectiveness of temperature regulation

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Question 1:

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

A) Increased air pressure in the engine room

B) Clogged or fouled cooling passages

D) Improperly aligned engine components

C) High coolant flow rate

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Question 5:

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

C) Improved pressure drop across the cooler

B) Decreased temperature difference across the cooler

A) Increased heat transfer efficiency

D) Increased coolant temperature at the cooler outlet

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Question 5:

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

C) Well-maintained gaskets and seals

B) Fouled or dirty cooler surfaces

D) Properly functioning pumps

A) Increased coolant temperature

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