power system 101 assessment

7/29/2019 Power System 101 Assessment

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Power System 101

1. The Grid shall be based on the Single Outage Contingency criterion which

means the Grid must continue to operate in the _______ State following theloss of one Generating Unit, transmission, or transformer.

a) Alertb) Normalc) Yellowd) Emergency

2. The System Operator issued this Grid Operation Notice ________ Alert whenthe Contingency Reserve is less than the capacity of the largest SynchronizedGenerating Unit or power import from a single interconnection, whichever ishigher.a) Red

b) Yellowc) Blued) Security Red

3. The ______ is a device used for turning water into steam.a) turbineb) transformerc) generatord) boiler

4. Which of the following power plants is NOT preferred for peak load

operations?a) Diesel engine power plantb) Gas turbine power plantc) Nuclear power plantd) Pumped Storage Hydro power plant

5. A ______ power plant is a means of converting the potential chemical energyof fuel into electrical energy.a) steamb) windc) hydrod) solar

6. Which of the following power plants is NOT preferred for base load operations?

a) Gas turbine power plantb) Nuclear power plantc) Hydro power plantd) Steam power plant

7. A diesel power plant is best suited as

a) base load plantb) standby load plantc) intermediate load plantd) peak load plant



8. Which power plant CANNOT have a single unit of 100 MW?

a. Hydro power plantb. Diesel power plantc. Steam power plantd. Nuclear power plant

9. Which of the following plant is expected to have the longest expected life?a) Steamb) Nuclearc) Hydroelectricd) All of the above

10. Which of the following plants will take least time in starting from cold

conditions to full load operations?a) Gas turbine

b) Steam power plantc) Nuclear power plantd) Coal power plant

11. During the load shedding, ________________.a) system frequency is reducedb) system power factor is changedc) some loads are switched off d) system voltage is reduced

12. The purpose of a power grid is to ______________.

a) supply energy to remote areasb) interconnect the power stationsc) make extra high voltage available to customersd) make distribution energy at reasonable costs

13. From the power equation below:

Power = Voltage x Current

Raising the voltage means that the current can be _____ for the sameamount of power.a) increasedb) reduced

14.Based on PGC, the System Operator shall maintain the frequency within thelimits from ____ Hz to _____ Hz during Normal conditions.

a) 59.7, 60.3b) 59.5, 60.5c) 59.4, 60.6

d) 59.0 61.0

15.When electrical current is given multiple conductive paths on which to flow ,

current will ONLY take the path of least resistance. Please answer True or



False.

16. Which of the following transmission reliability indices is NOT prescribed by

ERC that will measure the total number and duration of sustainedinterruptions in the Grid.a) SAIFIb) SAIDI

c) CAIDId) None of the above

17. According to PGC 3.2.2.2, the System Operator must intervene when the

frequency limits of _____ Hz and ____ are breached.a) 59.7, 60.3b) 59.4, 60.6c) 59.5 , 60.5

d) 59.0 , 61.0

18. The voltages at all connection point in the Grid are within the limits of _____ and _____ of the nominal value is one of the five conditions when theGrid is in Normal State.a) 0.90 , 1.10

b) 0.95 , 1.05

c) 0.97 , 1.03d) 0.94 , 1.06

19. Electrical equipment must be grounded so that sufficient fault current will

flow through the circuit protection device to quickly open and clear the

ground fault. For example a 20 A circuit breaker will trip and de-energize a240 V ground fault to a metal traffic signal pole that is grounded to a 25-ohm ground rod. Please answer True or False

20. The following events shall be excluded in the calculation of the reliability

indices of the Distribution utility.a) Outages that occur on the subtransmission line of the Distribution Utilityb) Faults on the Substation of the Distribution Utilityc) Outages that occur on the secondary line of the Distribution Utilityd) Line faults on the primary distribution system

power system 101 assessment

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