POWERLINE REVIEWER POWERPLANT

premopremo remo · 75問 · 2年前

通報

問題一覧

Out of the following, which ONE is not inconventional source of energy?

nuclear power

What is the reason why thermal power plant decrease capacity during summer?

temperature rise of the lake

An effective remover of dusts, carbon particales and other from flue gas of power plant?

Electrostatic precipitator

The efficiency of the terminal power plant improves __________

useb high steam efficiency

Reheat cycle in steam power plant is used to

increase thermal efficiency

Which power plant can have a singe unit up to 100 MW

diesel power plant

Which of the following powerplant will take least time in starting from cold condition to full load condition?

Hydro electric

In fission energy is produced when _______

nuclear particles plant

Which of the following is a variable renewable energy (VRE)?

Solar plant

The net energy required of a certain countrybin the yr. 2020 was approximately 3x10^6 Hwh. What is the equivalent value in quad?

10.24

In a power station, 4x10^4 Gwh of energy is to be produced in 1 yr. half from coal and half from natural gas. The energy content of coal is 900 W-yr per ton and that of natural gas is 0.03 W-yr. per ft^3. How much natural gas will be required?

76.1x10^9 ft^3

A 100 MW power plant has a heat rate of 2.88x10^8 Calories per kWh. Itbisba base load plant and runs at full load 24 hrs. a day. How many tonsbof coal is needed per day?

960

A diesel power station has a fuel consumption of 0.37 lb/kWh, the calorific value of fuel being 30,000 BTU/lb. Determine the engine efficiency if the generator efficiency is 95% neglect brake power on the engine

32%

* The growth rate of the energy consumption innout country is 6.9%. In how many years will the energy consumption be quadrupled?

20 yrs

Natural gas reserve in a certain country is estimated at 100x10^9 ft^3, with an enegry content of 0.025 W-yr. per ft^3, if the present peak power demand is 0.5 GW and the power demand growth rate is 5% and all the energy is to be supplied by natural gas approximately how long will the reserve last?

4.46 yrs

What is the function of the surge tank in the hydropower plant?

Relieve water hammer pressures in the penstock pipe

Part of hydroelectric power station that discharges the surplus water from storage reservior into the river on the downstream side of the dam.

Spillway

How does the ouput of hydraulic turbine vary the diameter of the blade?

It varies directly as the square of the diameter of the blade

Two million cu meter of water is stored in a reservoir feeding water turbine. If the center of the mass is 50 m above the turbine and losses are negligible, how much energy (in Mwh) will that volume produced? The density of water is 993 kg/m^3

271

A wind generator with an efficiency of 80% has a blade diameter of 20 m. If the wind velocity is 35 kph. how much power is obtainable feom the generator?

54.78 kW

The maximum tidal head available for a proposed tidal power station is 7m. If the wind velocity is 35 kph, how much power is obtainable from the generator?

112 sq.km

A power customer is applying for source listed the loads as follows: 5-15 hp motor, 3-5 hp motors, lighting 8 kW, miscellaneous loads 3.5 kW. The demand factor is 65% and the power factor 80% wherein the load factor is 46%. What is the maximum kW demand for the customer?

Which of the following define the meaning of load factor?

The ratio of average load to maximum load

The power customer has four circuits of 220 volts, three phase. The circuits have the maximum demand as follows: Circuit 1 = 35 Am Circuit 3 = 72 Amp Circuit 2 = 46 Amp Circuit 4 = 57 Amp The diversity factor is 1.5 the load factor is 50% and the power factor is 80%. What is the approximate kW demand of the customer?

21 kW

A power olant has maximum demanf of 15 MW. The annual load factor and capacity factor are 50% and 40% respectively. Determine the reserve capacity of the plant

3750 kW

The annual load duration curve of a certain power station can be considered as a straight line from 20 MW to 4 MW. To meet this load, 3 turbo- alternator units, two rated at 10 MW each and one rated 5 MW are installed. Determine the plant use factor

48%

A generating station has a maximum demand of 40 MW, annual load factor of 75%, annual plant capacity factir of 65% and a plant use factor of 85%. What is the annual energy produced?

200.9×10^6 kWh

Base load plats are designed to supply power at ___________

high capital cost & low operating cost

Peak load plants are designed to supply power at _________

low capital cost & high operating cost

A generating station has following data installed capacity = 300 MW Annual load factor = 60%, Annual capacity factor = 50%, Annual interest & depreciation = 10% Annual cost of fuel, oil etc = P90 million, capital cost = P1,000 million. What is the cost per kWh generated?

P0.24

What is the meaning of heat rate of a generating unit?

The amount of fuel energy used to produced one kWHR

Which of the following is the least efficient power plant?

Coal friend

A diesel power plant is best suited as ________

Stand by

One of the following methods of producing emf NOT yet in commercial use

Fuel cell

With which of thw following is enthaply associated?

steam

In a steam turbine cycle the lowest pressure occurs in the____________

Condenser

Which one is essential for combustion fuel?

all of the above

Which of the following is non renewable source of energy?

nuclear

Which of the following element is a radioactive?

Uranium

The energy of present nuclear plants comes from

the destruction of very tiny particles released when atoms split

In fusion energy is produced when ________

nuclear combines particle

In the list below, which one is not a type of present day nuclear power plant?

fusion fission reactor

Reflecting mirrors used for exploiting solar energy in a solar power plant is ________

heliostats

Of the various methods of utilizing the heat from the sun one appreas to be the most efficient so far. Which one is this?

mirrior and tracking system

To produce one kWh a power plant burns 0?9 lb of coal with a heating value of 13,000 BTU per lb. What is the heat rate of the plant?

11,700 BTU/kW-hr

The turbine which is normally used in a tidal power plant is ______

reversible type

The following are the essential parts of a hydroelectric power station. EXCEPT

throttle valve

The intake pipe to the hyrdraulic turbine from a dam is called ________

penstock

The water behind the dam at a hydrielectric power plant is _______

pondage

which plant can never have 100 percent load factor?

peak load plant

A low utilization factor for a plant indicates that __________

plant is used for stand by purpose only

During load shedding what happen

some load are switched off

Estimate the average power output of a wind turbine having a blade dismter of 35 ft if the wind velocity ranges from 10 tp 39 mph?

42.20 kW

A hydroelectric plant generates 100 MW at an available head of 200 m and at an overall efficiency of 75% what quantity of water ine cubic meter per second is required?

A power plant gets water from a dam feom a height of 122.45 meters at the rate of 1,000 cubic meter per minute. If the output of the plant is 15,000 kW what is the efficiency?

75%

Daytime capacity when only 300 MW pump storage plant and 600 MW Nuclear plant is operating _______

900 MW

A diversity factor of 4.2 gives a savings of _________ percent in the geenrating equipment

The current loads of four circuits are as follows Circuit No.1 = 25 Amp Circuit No.3 = 18 Amp Circuit No.2 = 38 Amp Circuit No.4 = 45 Amp

84 Amp

A power plant is said to have a use factor of 48.5% and a capacity factor of 42.4%. How many hours did it operate during the year?

7,658 hrs

Which of the following generating station has the minimum running cost?

Hydro electric plant

The type of switchgear assembly commonly selected for use in a turbine generator power plant is ________

Dual benchboard

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