Electro-Technical Competence

Basic Questions of Electrical Equipment

This test covers the basics of operating and maintaining electrical equipment, including setting thermal relays, measuring voltages, servicing batteries, distinguishing between analog and digital signals, methods of starting electric motors, selective protection, automations and much more.

Питань 18

Час 9 min

Мова Англійська

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Питання 1

In the absence of a spare Pt100 sensor, can it be replaced with a Type K thermocouple without making additional changes to the system?

A No, it cannot.

B Yes, it can.

C Only after agreement with the shipowner.

Питання 2

For what reason is a transmitter that converts the thermocouple signal into a current loop signal installed at the output of a thermocouple?

A The thermoelectric voltage signal cannot be transmitted over long distances without significant losses.

B The current loop signal at the output of the thermocouple needs to be additionally amplified.

C For stabilization and correction of the output signal of the thermocouple.

D To combine the signal from the thermocouple output with other temperature sensors on a specific device.

Питання 3

Which devices in a Modbus network can initiate data exchange?

A Only the master device.

B In Modbus TCP, multiple master nodes can communicate.

C Any device in the network.

D Slave devices have a built-in function for data transmission without a request.

Питання 4

You are dealing with the only paper version of a schematic that has been poorly preserved. You see the contact you need, but its symbol is erased. What do the adjacent numbers 3 and 4 indicate?

A 3 and 4 indicate that this is a normally open contact.

B 3 and 4 indicate that this is a normally closed contact.

C 3 and 4 are just the ordinal numbers of the contacts and do not carry any additional information.

Питання 5

In practice, when manually bringing a generator online in parallel operation, its frequency is set slightly higher than the network frequency on the busbars. This is done in order to...

A Ensure that the incoming generator takes on the active load immediately after being connected to the main distribution board busbars.

B Test the reverse power relay operation.

C Prevent the generator operating on the network from switching to motor mode.

D Avoid a sharp surge of equalizing currents.

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