LNG Operations - Engine

Automation Knowledge

You will meet questions for Senior ETO position for LNG carriers. questions would include VFDs, PMS, Electrical Propulsion, sensors, signals, communication of various equipment and troubleshooting.

Питань 20

Час 9 min

Мова Англійська

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Питання 1

What type of pressure transmitter is on this picture?

A Explosion proof

B Water proof

C Flame proof

D Submerged

Питання 2

Knock sensor readings jumping, what should you do?

A Check the terminals connection

B Replace the sensor

C Calibrate the sensor

D Adjust span or zero scale

Питання 3

What automation is used for cargo tanks overpressure prevention?

A Tank protection system.

B Sound and visual alarms.

C Emergency stop system

D Manual stop pushbuttons.

Питання 4

Can you explain the main components of a VFD and their functions in regulating motor speed and torque?

A Rectifier, inverter, and controller. Convert AC to DC, then back to variable frequency AC to control motor speed and torque.

B Transformer, capacitor, and resistor. Store energy and regulate voltage to the motor.

C Relay, fuse, and contactor. Provide electrical protection and switching for the VFD.

D Diode, transistor, and resistor. Control current flow and voltage regulation in the motor.

Питання 5

PT100 sensor temperature reading to low, what is possible cause?

A Short circuit

B Miswired

C Incorrectly mounted

D All of the mentioned

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