Question 1

What is true of both single-phase and polyphase AC motors:

Options :

A : They both use a rotating magnetic field to induce torque in the rotor.

B : They both require a capacitor to create the necessary phase shift for starting.

C : They both have the same number of stator windings and rotor poles.

D : They both have the same efficiency and power factor

Answer: A

Question 2

Which of the following BEST describes the different technology logic systems used in safety systems?

Options :

A : They are systems that use sensors, logic solvers, and final control elements to take the process to a safe state in case of an emergency.

B : They are systems that use switches, relays, and valves to control the process variables and prevent any safety hazards.

C : They are systems that use transmitters, controllers, and actuators to monitor the process conditions and optimize the performance.

D : They are systems that use scanners, computers, and displays to collect and analyze the process data and provide feedback.

Answer: A

Question 3

A device failure goes undetected by internal diagnostics; it does not directly impact safety but it does impact the ability to detect a future fault in a diagnostic circuit. In a failure rate database, this event would be classified as:

Options :

A : safe failure, since it does not increase the risk of a hazardous event and can be corrected during routine maintenance.

B : A dangerous failure, since it reduces the availability and reliability of the device and increases the probability of a hazardous event.

C : A latent failure, since it is not detected by the device or the user and remains hidden until it causes a hazardous event.

D : A nuisance failure, since it does not affect the safety or availability of the device but may cause annoyance or inconvenience to the user.

Answer: A

Question 4

Which of the following is the next step in the cycle after housekeeping tasks such as communication with operator:

Options :

A : Update Inputs

B : Execute Program

C : Update Outputs

D : Initialize Hardware

Answer: A

Question 5

What is the simplest technique for addressing the nonlinearity problem in machine learning?

Options :

A : dding higher-order terms of the features

B : Applying a nonlinear activation function

C : Scaling the features to a common range

D : Performing dimensionality reduction

Answer: A