Question 1

Which of the following statements is true about gauge pressure?

Options :

A : It is measured relative to a perfect vacuum.

B : It is measured relative to the local atmospheric pressure.

C : It is measured relative to the pressure difference between two points.

D : It is measured relative to the pressure in an adjacent vessel.

Answer: A

Question 2

What training method is worst suited to help operators with rarely performed maintenance tasks?

Options :

A : Single-point lesson

B : Lecture

C : Simulation

D : Case study

Answer: A

Question 3

Which of the following statements BEST describes the difference between an alarm system and a safety system?

Options :

A : n alarm system alerts the operator of an abnormal condition that requires a timely response, while a safety system automatically takes corrective actions to prevent or mitigate hazardous consequences.

B : An alarm system records the video footage of the events occurring on the property, while a safety system uses motion sensors and other equipment to detect intrusions and notify the authorities.

C : An alarm system applies human factors and ergonomics to design an alarm interface that increases usability, while a safety system monitors and assesses the performance of the alarm system against predefined targets.

D : An alarm system creates a loud noise or flashing lights to scare away potential intruders, while a safety system contacts the homeowners or local authorities once the alarm sounds.

Answer: A

Question 4

Which of the following statements is not true about the limitations of relay ladder logic and function block languages?

Options :

A : They are not suitable for mathematical calculations or complex logic functions

B : They are not suitable for data manipulation or communication with other devices

C : They are not suitable for discrete or sequential control

D : They are not suitable for large programs that require modularity and reusability

Answer: A

Question 5

A resistor is used in a current loop system to convert the current signal to a voltage signal that can be measured by an indicator or a controller. The value of the resistor determines the voltage range that corresponds to the current range. For example, in a 4 to 20 mA system with a 250 ohm resistor, the voltage range is 1 to 5 V, because V = IR, where V is the voltage, I is the current, and R is the resistance. What is the value of resistance?

Options :

A : 50 ohms

B : 100 ohms

C : 125 ohms

D : 150 ohms

Answer: A

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