Exam (elaborations)
all units mcqs
- Course
- Institution
- Book
Power Generation Technology
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
MCOs on Power Generation Technology
-
Economics of Power Generation
Seller
Follow
yrpatil
Content preview
Q 1) Which of the following energy has the greatest potential among all the sources ofrenewable energy?
a) Solar energy
b) Wind Energy
c) Thermal energy
d) Hydro-electrical energy
Answer: a
Explanation: Solar energy has the greatest potential of all the sources of renewable energy
which comes to the earth from sun. This energy keeps the temperature of the earth above that
in colder space, causes wind currents in the ocean and the atmosphere, causes water cycle and
generates photosynthesis in plants.
Q 2) What is the rate of solar energy reaching the earth surface?
a) 1016W
b) 865W
c) 2854W
d) 1912W
Answer: a
Explanation: The solar energy reaching the surface of the earth is about 1016W whereas the
worldwide power demand is 1013W. That means solar energy gives us 1000 times more energy
than our requirement.
Q 3) What is total amount of solar energy received by earth and atmosphere? 2M
a) 3.8 X 1024 J/year
b) 9.2 X 1024 J/year
c) 5.4 X 1024 J/year
d) 2.1 X 1024 J/year
Answer: a
Explanation: Even if we use 5% of this energy, it is more than 50 times our requirement. The
total solar radiation absorbed by the earth and its atmosphere is 3.8 X 1024 Joules/year. Except
that it is distributed over the area of earth.
Q 4) Which is most common source of energy from which electricity is produced?
a) Hydroelectricity
b) Wind energy
c) Coal
d) Solar energy
Answer: c
Explanation: Coal is the most common source of energy that is being used since
industrialization. Modern steam boilers can burn coal in any of its form as a primary fuel.
Different ranks of coal available are peat, lignite, bituminous and anthracite.
,Q 5) Oil is estimated to last for ________ more.
a) 100 years
b) 500 years
c) A decade
d) 800 years
Answer: a
Explanation: Almost 40% of energy needs is met by oil alone. With present consumption and a
resource of 250,000 million tonnes of oil, it is estimated to be last for only 100 years, unless
more oil is discovered. Major chunk of oil comes from petroleum.
Q 6) Complete the following reaction.
H2O + CO2 → _______
a) CH2O + O2
b) CO2 + O2
c) H + CO2 + O2
d) CH2O + H2O + O2
Answer: a
Explanation: H2O + CO2 → CH2O + O2 ∵under solar energy CH2O is stable at low temperature but
breaks at higher temperature releasing heat equal to 469 Kj/mole.
Q 7) In what form is solar energy is radiated from the sun?
a) Ultraviolet Radiation
b) Infrared radiation
c) Electromagnetic waves
d) Transverse waves
Answer: c
Explanation: Solar energy is radiated from the sun in the form of electromagnetic waves of
shorter wavelength of 0.2 to 0.4 micrometers. Out of all the solar energy radiations reaching
the earth’s atmosphere, 8% is ultraviolet radiation, 40% is visible range light and 46% is by
infrared radiation.
Q 8) What does MHD stands for in the energy field?
a) Magneto Hydro Dynamic
b) Metal Hydrogen Detox
c) Micro Hybrid Drive
d) Metering Head Differential
Answer: a
Explanation: Magneto hydro dynamic is a generator which is used for direct conversion of
thermal energy into electrical energy. They work on faraday principle. When an electric
conductor moves across a magnetic field, electric current is produced.
,Q 9) Solar radiation which reaches the surface without scattering or absorbed is called
_____________
a) Beam Radiation
b) Infrared radiation
c) Ultraviolet radiation
d) Diffuse radiation
Answer: a
Explanation: Solar radiation that has not been absorbed or scattered and reaches the ground
from the sun is called direct radiation or beam radiation. It is the radiation which produces a
shadow when interrupted by an opaque object.
Q 10) The scattered solar radiation is called ____________
a) Direct Radiation
b) Beam Radiation
c) Diffuse radiation
d) Infrared Radiation
Answer: c
Explanation: Diffuse radiation received from the sun after its direction has been changed by
reflection and scattering by the atmosphere. Since the solar radiation is scattered in all
direction in the atmosphere, diffuse radiation comes to the earth from all parts of the sky.
Q 11) Solar radiation received at any point of earth is called ______________
a) Insolation
b) Beam Radiation
c) Diffuse Radiation
d) Infrared rays
Answer: a
Explanation: Insolation is the total solar radiation received at any point on any point on the
earth’s surface. In other words insolation is the sum of the direct and diffuse radiation. More
specifically insolation is defined as the total solar radiation energy received on a horizontal
surface of unit area on the ground in unit time.
Q 12) Insolation is less ____________
a) when the sun is low
b) when the sun right above head
c) at night
d) at sun rise
Answer: a
Explanation: The insolation at a given point or location on the earth’s surface depends among
other factors, on the altitude of the sun in the sky. As a result of absorption and scattering, the
insolation is less when the sun is low in the sky than when it is higher.
, Q 13) HHW stands for ____________
a) High and Low water
b) High Level Waste
c) Heated Low Level water
d) High and Low Waste
Answer: b
Explanation: These are generated in reprocessing of spent fuel. They contain all fission products
and contain of the transuranium elements not separated during reprocessing. Such wastes are
to be disposed of carefully.
Q 14) What is unit of nuclear radiation?
a) Reaumur
b) Roentgen
c) Rankine
d) Pascal
Answer: b
Explanation: Units of nuclear radiation is Roentgen- amount of radiation which will on passing
through pure air under standard condition produce 1 electrostatic unit of ions/cm3 of air -> 86.9
ergs of energy absorbed/gm of air.
Q 15) Which type of fuel is removed from the reactor core after reaching end of core life
service?
a) Burnt Fuel
b) Spent fuel
c) Engine oil
d) Radioactive fuel
Answer: b
Explanation: Spent fuel is the unprocessed fuel that is removed from the reactor core after
reaching end of core life service. It is removed and then stored for 3 to 4 months under water in
the plant site to give time for the most intense radioactive isotopes to decay.
Q 16) Which of the following energy has the greatest potential among all the sources of
renewable energy?
(A) Solar energy
(B) Wind energy
(C) Thermal energy
(D) Hydro-electrical energy
Answer A
Q 17) What is the rate of solar energy reaching the earth's surface?
(A) 1026 W
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 yrpatil. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79373 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now