Exam (elaborations)
EGEE (official) practice exam Questions and Answers Graded A+
- Course
- Institution
EGEE (official) practice exam
[Show more]
Content preview
EGEE (official) practice examTrue or False? Photovoltaic solar panel is pollution free energy technology. - answer
false
true or false? any energy technology that has lifecycle environmental costs associated
with mining raw materials, manufacturing, and transportation are NOT pollution free -
answer true
which list contains only renewable energy resources? - answer solar, wind, hydropower
Why is the global energy demand is quickly growing? Check all that apply. - answer due
to population growth
due to people striving for higher standard of living
The majority of the world's used energy comes from ______ - answerfossil fuels
true or false? most of the energy people use in the world is converted from fossil fuel
combustion - answertrue
True or False? Energy is produced when fossil fuels are burnt. - answerfalse
Heat spontaneously flows from a body with a higher temperature to a body with a lower
temperature. - answertrue
What type of energy is stored in a gallon of gasoline? - answerchemical
What kind of energy conversions occurs in the clothes dryer? (Check all that apply) -
answerelectrical to mechanical
electrical to thermal
What kind of energy conversions occur in the incandescent light bulb? Check all that
apply. - answerelectric to thermal
thermal to radiant
Which of the following is unit of power? - answerwatt
Which of the following are units of energy. Check all that apply - answerBTU
calorie
joule
kW is a unit of - answerpower
, kWh is a unit of - answerenergy
What would be the correct way to find the energy used by an electric appliance? -
answermultiply power by time
How much energy is used by a 1100 W refrigerator over 2 days? - answer52.8 kWh
Multiply 1100 W by 48 hours (2 days) = 52,800 Wh = 52.8 kWh
Bulb A is 25 W and was on for 4 hours. How much energy did it use? - answer100
25x4
Find the efficiency of the device that outputs 12,000 BTU of thermal energy while
consuming 16,000 BTU of electrical energy from the grid. Input your answer (%) below
(number only) - answer75%
output/input
How much light energy would a light bulb supply if over a day it consumes 750 Wh from
the electric grid, and its efficiency is 12%? Input your answer below in Wh (number only)
- answer90
750 x 0.12
How much fuel energy would a furnace need as input if the useful output requirement
(heat energy) is 250,000 BTU, and the furnace efficiency is 90%? - answer277,777 BTU
useful/ efficiency value
If a solar collector converts incident solar radiation to heat with efficiency 61%, and the
heat exchanger converts heat of the fluid to heat of water storage with efficiency of
89%, what is the total efficiency of this system? (tip: system efficiency is typically a
product of all efficiencies in the process) - answer54%
multiply
True or False? The world's oil reserves represent the amount of fuel that has been
demonstrated to exist and can be economically extracted with available technologies -
answertrue
true or false? reserves are "extractable" resources - answertrue
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller julianah420. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73091 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now