AME 10 End of Unit – SVE Study

AME 10 End of Unit Quiz

1 / 12

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

D. It increases the engine's temperature

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

C. It displays the engine temperature to the operator

A. It adjusts the coolant flow

2 / 12

If the heat exchanger is found to be clear, what could be another potential cause of the rising jacket water temperature?

D. Worn piston rings

C. Incorrect fuel injection timing

B. Low seawater temperature

A. Airlock in the cooling system

3 / 12

What is the purpose of having a deadband or overlap in the control signal range in a split range control system?

C) To provide a buffer zone where neither valve operates, allowing temperature stabilization.

A) To ensure simultaneous operation of both heating and cooling valves.

D) To allow manual intervention without disrupting the control system.

B) To prevent both valves from being fully open at the same time.

4 / 12

What is the primary advantage of using a split range control system to manage the jacket water temperature in a main engine?

A) It allows for precise control by using separate controllers for heating and cooling.

B) It simplifies the control system by using a single controller to manage both heating and cooling.

D) It increases the system’s complexity by requiring manual intervention for temperature adjustments.

C) It reduces the risk of overheating by prioritizing cooling over heating.

5 / 12

Which of the following best describes the role of the controller in a split range control system?

D) The controller measures the temperature and adjusts only the heating system.

A) The controller alternates between heating and cooling based on the time of day.

C) The controller sends separate signals to two independent controllers for heating and cooling.

B) The controller outputs a signal that is divided between heating and cooling operations.

6 / 12

What is a potential action to take if an airlock is suspected in the cooling system?

C. Add more coolant to the system

D. Replace the thermostat

B. Bleed the cooling system

A. Increase engine load

7 / 12

What could happen if the split range control system's sensors fail to provide accurate temperature readings?

A) The system will operate normally, as it can compensate for sensor inaccuracies.

D) The system will automatically switch to a backup control method.

C) The system may shut down entirely to prevent damage to the engine.

B) The system may overheat the engine due to a lack of proper cooling.

8 / 12

How does a controller block typically function in a control block diagram?

A) It measures the system output

B) It compares the actual output with the desired set point and makes adjustments

D) It represents the sensor

C) It generates the feedback signal

9 / 12

How does the feedback loop function in a closed-loop engine cooling control system?

A. It measures the engine temperature

C. It manually adjusts the coolant flow

D. It displays the desired temperature to the operator

B. It provides temperature measurement to the controller for adjustment

10 / 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

Answer: D) Outlet coolant temperature

A) Engine RPM

B) Ambient air temperature

11 / 12

Explain the term "failset" in a control system and provide TWO examples of its application.

A) A failset is a configuration that enhances system performance during a failure. Examples include increased power output and rapid response modes.

D) A failset is a mechanism that accelerates system operations during a failure. Examples include high-speed processors and fast-acting sensors.

B) A failset is a state where a system continues to operate at a reduced capacity when a component fails. Examples include partial valve operation and limited control input.

C) A failset is a predetermined state that a system moves to when it fails to operate correctly. Examples include valves that default to open or close positions and motor-driven actuators that move to a safe position.

12 / 12

What is the function of a feedback loop in a control block diagram?

A) To amplify the signal

D) To provide a set point for the system

C) To compare the output with the set point and adjust the system accordingly

B) To measure the system output

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