Question 1

A contractor purchases and installs a manual motor protector in accordance with the manufacturer’s installation instructions and the applicable National Electric Code (NEC) installation code. What is the main advantage of using a manual motor protector over a conventional circuit breaker or fuse?

Options :

A : manual motor protector provides both overload and short-circuit protection in a single device, eliminating the need for additional components and wiring.

B : A manual motor protector provides a faster and more reliable response to short-circuit conditions, switching off the motor within milliseconds to prevent damage.

C : A manual motor protector provides a more accurate and adjustable current setting range, allowing for better motor control and performance.

D : All of the above.

Answer: A

Question 2

What are some of the systems that are typically included in the scope of building automation?

Options :

A : HVAC (heating, ventilation and air conditioning), electrical, lighting, shading, access control, security systems

B : HVAC (heating, ventilation and air conditioning), plumbing, fire protection, elevators, escalators, parking systems

C : HVAC (heating, ventilation and air conditioning), audiovisual, communication, network, data center, backup power systems

D : All of the above

Answer: A

Question 3

Which of the following PLC programming languages is based on a graphical representation of relay logic circuits?

Options :

A : Ladder Diagram (LD)

B : Function Block Diagram (FBD)

C : Structured Text (ST)

D : Instruction List (IL)

Answer: A

Question 4

What is a cost-effective method of mitigating the effects of deep voltage sags on programmable electronic devices and preventing power interruptions or shutdowns in critical industrial manufacturing processes?

Options :

A : Using a dynamic voltage restorer (DVR) to inject the required voltage to compensate for the voltage sag and maintain the load voltage

B : Using a static synchronous compensator (STATCOM) to regulate the reactive power and improve the power factor and voltage stability

C : Using a unified power quality conditioner (UPQC) to correct both voltage and current disturbances and provide a clean power supply

D : Using a superconducting magnetic energy storage (SMES) system to store and release energy quickly and efficiently

Answer: A

Question 5

What is the main advantage of using cascade control over a single-loop control system?

Options :

A : ascade control can handle multiple disturbances and setpoints simultaneously

B : Cascade control can improve the stability and performance of the primary process variable

C : Cascade control can reduce the complexity and cost of the control system

D : Cascade control can eliminate the need for sensors and actuators in the secondary loop

Answer: A

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