AME 10 End of Unit – SVE Study

AME 10 End of Unit Quiz

1 / 12

In a manually operated water level control system, which block directly affects the flow of water into or out of the tank?

A. Sensor

D. Manual Controller

C. Feedback Path

B. Set Point

2 / 12

Which of the following is a typical setpoint for the secondary controller in a cascade control system regulating the freshwater coolant temperature?

C) Coolant flow rate

B) Ambient air temperature

Answer: D) Outlet coolant temperature

A) Engine RPM

3 / 12

In a closed-loop engine cooling control system, what role does the "Temperature Sensor" play?

A. It adjusts the coolant flow

B. It provides a measurement of the engine temperature to the controller

C. It displays the engine temperature to the operator

D. It increases the engine's temperature

4 / 12

What is meant by a 4:3 control valve?

B) A control valve that operates with a 4:3 pressure ratio between input and output, used for precise pressure control.

A) A control valve with four ports and three positions, used to regulate fluid flow in hydraulic systems.

C) A control valve designed to control the flow of four different fluids through three independent channels.

D) A control valve that alternates between four different flow rates in three distinct stages.

5 / 12

How could an improper range setting in a split range control system affect the engine cooling process?

A) The system may allow the temperature to drift slightly, but remain within safe limits.

C) The system may automatically recalibrate itself without any manual input.

B) The system may struggle to transition smoothly between heating and cooling modes.

D) The system may maintain a constant temperature, regardless of engine load.

6 / 12

What is the principle of a cascade control method used for regulating the freshwater coolant temperature of a diesel engine?

B. The method employs two control loops where the primary loop regulates the coolant temperature, and the secondary loop controls a related variable, such as coolant flow, to improve stability and response.

A. The method uses a single feedback loop to directly control the coolant temperature by adjusting the coolant flow rate.

D. The method involves manually adjusting the coolant flow rate based on periodic temperature readings to maintain the desired coolant temperature.

C. The method uses an open-loop control strategy to set a fixed coolant temperature, relying on the engine's operating conditions to maintain the desired temperature.

7 / 12

What does the "Controller" block in an automatic closed-loop engine cooling system do?

D. Manually adjusts the coolant flow

C. Compares the actual engine temperature to the desired set point and adjusts the coolant flow accordingly

B. Displays the engine temperature

A. Measures the engine temperature

8 / 12

What could be a possible cause of the high jacket water temperature alarm, despite the header tank being full and both HT and SW pumps running in good condition?

A. Blocked heat exchanger

C. Faulty temperature sensor

B. Low fuel pressure

D. Excessive engine load

9 / 12

In a closed-loop engine cooling system, which component is responsible for comparing the actual temperature to the desired set point?

A. Temperature Sensor

C. Controller

D. Display Unit

B. Coolant Flow Control

10 / 12

In a split range control system, what typically happens when the controller's output is in the lower range?

A) The cooling valve is fully opened, and the heating valve is closed.

D) The heating and cooling valves are both closed to maintain the current temperature.

B) Both the heating and cooling valves are partially opened.

C) The heating valve is opened, and the cooling valve remains closed.

11 / 12

What is the role of the "Process Element" block in the water level control system?

D. To represent the tank or reservoir holding the water

C. To measure the water level

A. To provide the desired water level

B. To adjust the water flow

12 / 12

Why might a split range control system be preferred over separate control systems for heating and cooling in marine engine applications?

D) It eliminates the need for a temperature sensor.

A) It is less expensive to install and maintain.

B) It provides smoother transitions between heating and cooling.

C) It allows for independent manual control of heating and cooling.

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