Test
Physics Exam 2
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Preguntas del test (42)
1All are properties of a Magnetic Field except:
- AElectric and Magnetic fields are represented in the same fashion.
- BThe magnetic field comes out of the north pole and enters into the south pole
- CThe closer the field lines, the stronger the field.
- DThe field lines will cross.
2Electric motors are designed completely different from generators because each have their own separate laws of physics.
- ATrue
- BFalse
3As the temperature of a battery decreases, the amount of charge held in the battery goes down.
Select one:- ATrue
- BFalse
4Allows for fish to migrate past the dam [blank_start]_[blank_end]
Area that allows water to flow into the generator area, it also filters out any objects that might destroy the generators. [blank_start]_[blank_end]
Structure to provide a controlled release of water from behind the dam [blank_start]_[blank_end]
Takes the energy of water and creates electricity [blank_start]_[blank_end]
Part of the dam where water flows directly into the generator [blank_start]_[blank_end]
Area where the water is held. [blank_start]_[blank_end]- AFish Ladder
- BIntake Gate
- CSpillway
- DGenerator
- EPenstock
- FReservoir
5Why are fuel cell vehicles an attractive option when compared to fossil fuel powered vehicles? (There maybe more than one answer)
- AThey release little to no pollutants and Greenhouse gases.
- BThey are extremely durable.
- CPEM fuel cells are low cost.
- DThe PEM fuel cell operates at a low temperature.
It operates between 50 to 100 degrees Celsius. - EThey can be quickly refueled.
It is the same amount of time as filling a gas tank.
6Which statement is not true about transformers?
- AThe primary loop is the source of electricity.
- BTransformers are used to step the voltage down and up.
- CThey work for AC and DC current.
- DThe Iron core causes the magnetic field to be stronger.
7Vertical axis wind turbines are more efficient than horizontal axis wind turbines.
- AVerdadero
- BFalso
8Generally, renewable energy technology and production increases in the times of high fossil fuel costs and will decrease when cost of fossil fuels decrease.
- AVerdadero
- BFalso
9What is not true about residential wind turbines?
- ACommercial wind production requires a higher average wind speed due to the size of the turbines, versus Residential which needs less wind production than Commercial because the size is smaller.
- BIt requires more wind than commercial wind production
- CIt can lower electricity bills by 50 to 90%.
- DIt can supply power when traditional sources are failing.
- EIt works well when combined with other renewable sources for consistent power production.
10The largest source of renewable energy for the United States is provided from________.
- AWind
- BHydro
- CNatural Gas
- DSolar
11What part of a wind turbine turns the turbine to face the wind?
- ACooling System
- BControl Box
- CAnemometer
- DYaw Controller
12Which is a basic type of Hydropower plant?
- AImpoundment
- BDiversion
- CPumped Storage
- DAll of the above
13Requires building a dam to hold back water then releasing it into turbine. Most Common type of hydropower plant. [blank_start]_[blank_end]
Hydroelectric facility that channels a portion of a river through a canal or penstock to produce electricity. The water is then returned to the river further downstream. [blank_start]_[blank_end]
Water is pumped to a reservoir in low demand times and then released when demand for electricity is high. [blank_start]_[blank_end]- AImpoundment Hydroelectric Plant
- BDiversion Hydroelectric Plant
- CPumped Storage Hydroelectric Plant
- DReservoir Plant
- ECreek Plant
- FDam
14What region(s) of the United States are best for wind power?
- ACoastal
- BNortheast
- CSouthwest
- DNorthwest
15Which two renewable sources of energy work best when used together?
- ASolar and Wind
- BWind and Hydro
- CHydro and Solar
- DNone of the above
16Which part of a dam allows water to flow from the reservoir to the generation plant?
- APenstock
- BFish Ladder
- CSpillway
- DNone of the above
17Which is not a factor affecting wind generation?
- AWind Speed
- BHeight
- CDensity of air
- DRotor Size
18What is a factor affecting the power produced from Hydro Sources?
- AHeight of the water
- BEfficiency of the turbine
- CTemperature of the water
- DA and B
19Wind generation for homes requires faster average annual wind speeds than utility production due to the smaller rotors.
- AVerdadero
- BFalso
20The two types of turbines for hydropower are Reaction and Impulse
- AVerdadero
- BFalso
21Reaction Turbines:
(Check all that apply)- AMajority of turbines today are reaction type
- BThe blades are acted on by water causing a change in Pressure
- CMust be fully submerged
- DRelies on a change in velocity(speed)
- EExample of a reaction turbine
22Impulse Turbines:
(Check all that apply)- ARelies on a change in velocity to push the turbine blades
- BMust be fully submerged
- CLooks like a water wheel
- DExample of an impulse turbine
23The majority of wind turbines are vertical axis turbines
- AVerdadero
- BFalso
24Hydropower is still used for turning saws and grinding grain in remote areas of the world.
- AVerdadero
- BFalso
25Wind production of electricity began in 1950.
- AVerdadero
- BFalso
26What material allows for the flow of charge with no resistance?
- AConductor
- BInsulator
- CSemiconductor
- DSuperconductor
27The Public Utility Regulatory Policies Act (PURPA) promoted the use of renewable energy sources in the production of electricity.
- AVerdadero
- BFalso
28Magnetic fields can appear from a single pole/magnetic charge and electric fields need two charges.
- AVerdadero
- BFalso
29A cell in a battery is a combination of terminals/electrodes and electrolyte
- AVerdadero
- BFalso
30Batteries and Fuel cells transform [blank_start]_______[blank_end] energy to electrical energy.
- AThermal
- BChemical
- CSolar
- DWater
31For electrical forces, if the distance between the charges increase, the force:
- ADecreases
- BIncreases
- CStays the same
32We built an electric motor in lab. What is a part of a basic DC electric motor?
- ACoil of wire
- BBattery
- CMagnet
- DAll of the above
33Advantages of Hydropower:
[blank_start]_[blank_end]
[blank_start]_[blank_end]
Disadvantages of Hydropower:
[blank_start]_[blank_end]
[blank_start]_[blank_end]- AReduced Carbon Dioxide Emissions
- BMorePredictable form of renewable energy
- CCan drastically alter the ecosystem
- DPossibly Catastrophic failure of a dam
34Select all that are components of a battery:
- ATerminals/electrodes
- BElectrolyte
- CFudge
- DCell
35What are two types of wind turbines?
- AHorizontal Axis
- BOblique
- CVertical Axis
- DRound
36Advantage of Horizontal Wind Turbine: [blank_start]_[blank_end]
Disadvantage of Horizontal Wind Turbine: [blank_start]_[blank_end]
Advantage of Vertical Wind Turbine: [blank_start]_[blank_end]
Disadvantage of Vertical Wind Turbine: [blank_start]_[blank_end]- AWorks better with smaller amounts wind
- BNeeds realigned to wind direction
- CDoesn’t need to be repositioned
- DRequires large amounts of wind
37Name the four factors effecting resistance:
- AResistivity/Conductivity of the material- The larger resistivity/lower conductivity gives a high resistance.
- BLength of wire – the longer the wire, the higher the resistance.
- CTime - The longer it is turned on, the higher the resistance.
- DTemperature - As temperature goes up, resistance goes up.
- EDiameter of wire – As diameter gets larger, the resistance goes down.
38What are the two necessary requirements for an electric circuit?
- AElectric Potential
- BWires
- CConnected Pathway
- DCut lines
39What are two advantages of batteries?
[blank_start]_[blank_end]
[blank_start]_[blank_end]
What are two disadvantages of batteries?
[blank_start]_[blank_end]
[blank_start]_[blank_end]- ASome batteries can be recharged(storage)
- BReliable source of Energy(nomovingparts)
- CThey are heavy
- DOnly 2% of the energy in a gallon of gas
40What is the difference between a dry and wet cell battery?
- AThe electrolyte is the difference. For a wet cell, the electrolyte is a liquid. For a dry cell, the electrolyte is a paste or solid.
- BThe cell is the difference.
- CThere is no difference.
- DThe electrolyte is the difference. For a wet cell, the electrolyte is a paste or solid. For a dry cell, the electrolyte is a liquid.
41All are different types of cells except:
- AWet Cell
- BDry Cell
- CCorn Cell
- DMolten Cell
- EReserve Cell
42Drag and drop the label and definition to the different parts of the wind turbine:
Name on top/Definition on bottom
- AAnemometer
- Bsenseswindspeed/direction/talks2controlr
- CController
- DChangespitch of blades/yaw/contrlbrakes
- EStops the turbine in extreme wind speeds
- FBrake
- GYaw Controller
- HTurns turbine to face the wind
Información
- Descripción
- (Exam 2) Physics Test sobre Physics Exam 2, creado por Jessica Tayson el 19/03/2017.
- Autor
- Jessica Tayson
- Idioma
- English
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