Q1. 您的個人月收入（單選題）

Q2. 您的職位？（單選題）

Q3. 您的年級：（單選題）

Q4. If the temperature exceeds during the charging process, measures must be taken to either stop the charging or switch to a floating charging state in order to bring the temperature down.（）（單選題）

• A 60 degree

• B 55 degree

• C 30 degree

• D 45 degree

Q5. This is not belong to main protection equipment of rectifier（）（單選題）

• A current sensor.

• B fast fuse

• C under voltage protection

• D heating device

Q6. Which is not the protection of feeder line cabinet in DC switchgear?（）（單選題）

• A High current tripping

• B Time delay over current

• C over voltage

• D Current increase

Q7. The efficiency of each rectifier unit should not be less than () under rated load.（）（單選題）

• A 90%

• B 85%

• C 98%

• D 88%

Q8. The primary windings of two rectifier transformers running in parallel in each traction substation are phase shifted by （）.（單選題）

• A +8.5 and -8.5

• B +7.5 and -7.5

• C +6.5 and -6.5

• D +9.5 and -9.5

Q9. Multi-stranded round copper wire is twisted and compacted to form a conductor with a copper content of ()% （）（單選題）

• A ≥99.97%

• B ≥99.98%

• C ≥99.93%

• D ≥99.95%

Q10. The basic structure of low voltage switchgear consist of contact system, ar extinguisher system and ground terminal（）（單選題）

• A true

• B false

Q11. The main components of oil-immersed power transformers are coil, iron core, fuel tank and （）（單選題）

• A bushing

• B tap changer

• C Transformer leads

• D gas relay

Q12. The 132kV section protection device is provided with three-phase current quick-break, zero sequence over current protection and ().（）（單選題）

• A over-voltage protection

• B under voltage protection

• C charging protection

Q13. The whole line of substation equipment is divided into four groups to manage the operation（）（單選題）

• A 6

• B 2

• C 4

• D 8

Q14. Substation group 3 have main post, remix post and buck post for duty as follows.（）（單選題）

• A 1,4,3

• B 2,3,3

• C 1,3,2

• D 1,3,3

Q15. The insulated plastic tube of the pliers can withstand more than () to protect personal safety.（）（單選題）

• A 250v

• B 800v

• C 500v

• D 550v

Q16. There is no main office, and the electricity will be directly supplied to the substations along the Orange line after taking power from the orange line power grid. After the voltage is reduced, power is supplied to the substations through the medium-voltage ring network. Features: highly dependent on the reliability and flexibility of the urban power grid. This system is called（）（單選題）

• A centralized power supply

• B hybrid power supply

• C decentralized power supply

Q17. Total number of transformer used for LPS system ( low voltage system) in orange line metro train excluding 2 main substation are （）（單選題）

• A 94

• B 64

• C 98

• D 62

Q18. Voltage level for TSS station for orange line metro train are（）（單選題）

• A 33kv/0.4kv

• B 132kv/33kv

• C 33kv/380v

• D 33kv/590v

Q19. Highest value for DC traction power supply system voltage of orange line train system can be up to.（）（單選題）

• A upto 1200v

• B upto 1000v

• C upto 900v

• D upto 800v

Q20. All electrical equipment of the substation is identified as “Live Equipment” from the ( ).（）（單選題）

• A when give power three times

• B have power for one month and above

• C first time when it’s powered on

Q21. The operation permit should be filled in two copies. One for the substation staff (), One for the job leader ().（）（單選題）

• A blue, pink

• B green , blue

• C pink, blue

• D pink, yellow

Q22. For 132kv equipment the minimum distance without protective fence between person and equipment should be （）（單選題）

• A 1 meter

• B 2 meter

• C 1.5 meter

• D 0.6 meter

Q23. The basic structure of low-voltage switchgear contains（）（單選題）

• A.Contact system

• B.Arc extinguishing system

• C.Trip unit

• D.All of the above are

Q24. The inverse time protection feature refers to ( ).（）（單選題）

• A.The greater the overvoltage, the longer the operating time

• B.The greater the overcurrent, the shorter the operating time

• C.The greater the overcurrent, the longer the operating time

• D.The greater the overvoltage, the shorter the operating time

Q25. When ()diodes of the same rectifier bridge arm of the rectifier are faulty, a trip signal is issued （）（單選題）

• A.1

• B.3

• C.2

• D.4

Q26. In General, climbing of more than ( ) meters is a high-altitude operation.（）（單選題）

• A.2

• B.2.5

• C.3

• D.3.5

Q27. In case of loss of AC power, all the load in the station related to AC/DC system is operated by （）（單選題）

• A.Generator

• B.Battery

• C.Discharge Machine

• D.Capacitor Banks

Q28. The Main transformer of the orange line 132kV system is ( ) transformer and the remaining transformers are ( ) transformer. （）（單選題）

• A.Oil type; Oil type

• B.Dry type; Dry type

• C.Dry type; Oil type

• D.Oil type; Dry type

Q29. A single rectifiertransformer is a ( ) pulse rectifier transformer, and two transformers run in parallel to form an equivalent ( ) pulse rectifier transformer. （）（單選題）

• A.6 –12

• B.6 - 6

• C.12 – 24

• D.24- 24

Q30. After the attendant receives the order, he should perform the simulation operation on ( ) before operation on live circuit, and confirm that there is no error before starting the tripping. （）（單選題）

• A. Simulation Chart

• B. Drawing Book

• C. Switch Book

• D. Computer Simulation

Q31. Return path to rectifier unit is provided by （）（單選題）

• A. Third Rail

• B. Ground

• C. Isolator Switch

• D. Main Rail

Q32. Which of the following is No Load Operating Device? （）（單選題）

• A. Circuit Breaker

• B. Disconnect/Isolator Switch

• C. Transformer

• D. Rectifier

Q33. The switch-off operation shall be performed according to the Job Permit written by （）（單選題）

• A. Line man

• B. Equipment Dispatcher

• C. HR

• D. Train Driver

Q34. What is the safe distance for Low Voltage Equipment with protective fence? （）（單選題）

• A. 1 meter

• B. 0.7 meter

• C. 0.35 meter

• D.0.6 meter

Q35. What level of voltage is specified as High Voltage? （）（單選題）

• A. 220V

• B. 400V

• C.400V and Above

• D. Above 400V

Q36. When using a connecting wire to ground, which end is connected first? （）（單選題）

• A.Ground end

• B.Equipment end

• C.No special requirements

• D.None of these options

Q37. For Case study, TSS station #15 will supply power to third rail of stations （）（單選題）

• A.13,15 & 17

• B.14,15 & 16

• C.13,15 & 16

• D.Only 15 & 17

Q38. Production Safety Policy （）（單選題）

• A.Safety First, Efficiency Second

• B.Safety First, Protocol First

• C.Safety First, Prevention First

• D.Safety First, Equipment First

Q39. Which Installation method of the contact rail is used in Orange Line Metro? （）（單選題）

• A.Middle contact

• B. Upper contact

• C. Lower contact

• D.Side contact

Q40. Why does the orange line Metro DC feeder switch have an automatic reclosing start after tripping?( A )（單選題）

• A the fault may be transient

• B. the fault may be permanent

• C .he nature of the fault is uncertain

• D.the nature of the fault

Q41. Which is the best phase to extinguish fire process?( A)（單選題）

• A. Beginning

• B. Develop

• C. Fierce

• D.Reduce

Q42. Which of the following is not a part of third rail?（）（單選題）

• A Steel-Aluminum Composite

• B Brake Shoes

• C End Elbow

• D Protective Cover

Q43. To compensate for the non-uniform voltage of the storage battery we use floating charging.(? ?)（單選題）

• A true

• B false

Q44. AC-DC system composition includes AC screen , charging screen, battery screen and intelligent monitoring screen.（）（單選題）

• A true

• B false

Q45. The basic function of feeder pate in ac dc system is to distribute AC power to each DC power equipment through circuit breakers and knife fuse switches.（）（單選題）

• A true

• B false

Q46. Compression coefficient of ac 33kv power cable is.（）（單選題）

• A 0.93

• B 0.89

• C 0.97

• D 0.91

Q47. The rated voltage of the under-voltage trip of the low-voltage circuit breaker shall be equal to the rated voltage of the circuit.（）（單選題）

• A true

• B false

Q48. Planned maintenance: according to the complexity of maintenance, it is divided into routine inspection, special repair and major repair.（）（單選題）

• A true

• B flase.

Q49. The cooling system used in oil immersed transformer is ONAN which means external air forced system used for the cooling of oil.（）（單選題）

• A true

• B false

Q50. Every LPS substation is also TSS substation but every TSS substation is not LPS substation, this statement is（）（單選題）

• A true

• B false

Q51. In oil-immersed transformers, the main component for transmitting and converting electrical energy is the iron core。（）（單選題）

• A true

• B false

Q52. Prohibited pull-on disconnect switch with load.（）（單選題）

• A true

• B false