LNG Operations - Engine

High Voltage Related Questions of LNG Fleet

Questions for ETO position working with High Voltage PMS and switchgear. Highly recommended for LNG fleet ETO's. Switchboards, procedures, VCB, HV Contactors and Safety questions are waiting for you here.

Питань 10

Час 5 min

Мова Англійська

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Питання 1

Shipboard power generation and distribution is mainly a three-phase three-wire ungrounded system. True or False?

A True

B False

Питання 2

What is the main risk of using Shaft generators onboard modern LNGs?

A Sudden ME slowdowns.

B Frequency surges.

C Main Voltage drops.

D ME Overspeed.

Питання 3

What should be inspected if a high voltage circuit breaker fails to close properly?

A The mechanical closing mechanism and the control circuit.

B The breaker’s insulation resistance.

C The power factor of the system.

D The temperature of the switchgear.

Питання 4

What is transient recovery voltage (TRV)?

A Voltage that is applied across the contacts of a circuit breaker after current interruption.

B Voltage that is applied to a circuit to restore power after a breaker trips.

C Voltage drop across a circuit breaker while it is conducting normal load current.

D Constant voltage maintained by the system to protect the circuit breaker during operation.

Питання 5

Choose Disadvantages of SF6 Circuit Breakers:

A More expensive than other types of breakers.

B Switching deposits restrict the number of operations before service/recondition.

C Generally limited to voltages of up to 6kV.

D Much bigger than other breakers.

High Voltage Related Questions of LNG Fleet

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