EE6009-Power Electronics for Renewable Energy Systems
MCQ Unit 1
1.
The renewable
resources that offer the greatest scope for the development of new energy
sources are
a)
Primary energy sources
b)
Secondary fuels
c)
Supplementary sources.
d)
All of the above
Answer:
d
2.
Wood is an
example of
a)
Non-commercial energy
b)
Commercial energy
c)
Non-renewable energy
d)
None of the above
Answer: a
3.
Uranium is an
example of
a) Non-commercial energy
b)
Commercial energy
c)
Non-renewable energy
d)
None of the above
Answer: c
4.
The sources
for those whose net energy yield is zero are called as
a)
Primary energy sources
b)
Secondary fuels
c)
Supplementary sources.
d)
All of the above
Answer: c
5.
Indirect form
of solar energy is
a)
Wind energy
b)
Tidal energy
c)
Ocean thermal energy
d)
Bio mass
Answer: a
6.
A machine that
converts kinetic energy of wind into mechanical energy is
a)
Yaw fixed machines
b)
Wind turbine
c)
Wind mill head
d)
None of the above
Answer: b
7.
One of the
advantages of wind power was
a)
Decentralised
b)
Probability
c)
Wildlife
d)
National security
Answer: a
8.
One of the
disadvantages of wind power was
a) Free
b)
Place ability
c)
domestic
d)
Aesthetics
Answer: d
9.
The
theoretical limit assigned to efficiency of a wind turbine is called as
a)
Dead limit
b)
free limit
c)
Betz limit
d)
Dead zone
Answer: c
10.
Drag is
a) Same in the
direction of air flow
b)
Perpendicular to the direction of air flow.
c)
at an angle to the direction of air flow.
d)
None of the above
Answer: a
11.
Lift is
a)
Same in the direction of air flow
b)
Perpendicular to the direction of air flow.
c)
at an angle to the direction of air flow.
d)
None of the above
Answer: b
12.
The components
of tidal power plants are
a)
Dam or dyke
b) Sluice ways
c)
The power house
d)
All of the above
Answer: d
13.
The advantage
of tidal power plant is
a)
free from pollution
b)
construction in sea
c)
The power house
d)
All of the above
Answer: a
14.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
15.
What is the
rate of solar energy reaching the earth surface?
a) 1016W
b) 865W
c) 2854W
d) 1912W
Answer: a
.
16.
What is total
amount of solar energy received by earth and
atmosphere?
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
17.
Which is most
common source of energy from which electricity
is produced?
a)
Hydroelectricity
b)
Wind energy
c)
Coal
d)
Solar energy
Answer: c
18.
The amount of
energy received in unit time on a unit area perpendicular to the sun’s
direction at the mean distance of the earth from the sun is called
 |
a)
Solar radiation
b)
Solar constant
c)
Intensity of solar radiation
d)
Air Mass
Answer: b
19. What is ‘n’ in the following solar intensity formula? I = Isc {1 + 0.033cos (360n/365)}
a)
Day of the year
b)
Month of the year
c)
The year
d)
Week of the year
Answer: a
20.
When the sun
is directly on the top of head, it as referred
to
a) Zenith
b)
Azimuth
c)
Declination
d)
Hour angle
Answer: a
21. Path length of radiation through the atmosphere to the
length of path when the sun is at zenith is called
a)
Declination
b)
Air mass
c)
Azimuth
d)
Solar Constant
Answer: b
22.
Radiation
intensity ‘I’ normal to the surface is given
by
a) ICosθ
b) Itanθ
c) ICotθ
d) Isinθ
Answer: a
23. Angle made by radial line joining the location to the
centre of the earth with the
projection of the line on the equatorial plane is called
a)
Latitude
b) Zenith angle
c)
Hour angle
d)
Declination
Answer: a
24.
Angular
distance of sun’s rays north or south of the equator is called
 |
a)
Declination
b)
Hour angle
c)
Latitude
d)
Air mass
Answer:
a
25.
By which of
the following symbol is solar Declination denoted by
 |
a) δ
b) ρ
c) Δ
d) γ
Answer: a
26.
The angle
through which the earth must turn to bring the meridian of a point directly in sun’s rays is called
a)
Hour angle
b)
Declination
c)
Latitude
d) Air mass
Answer: a
27.
Solar Altitude
is also called as
a)
Declination
b)
Altitude angle
c)
Zenith angle
d)
Azimuth angle
Answer: b
28. The angle between the sun’s rays and a line perpendicular
to the horizontal plane through
angle the beam of the sun and vertical is called
a)
Solar Azimuth angle
b)
Zenith angle
c)
Altitude angle
d)
Declination
Answer: b
29.
For what
purpose are Gas heating collectors used?
a)
To trap solar radiance
b)
To act as a medium to help in conversion of sunlight to
electrical energy
c)
Employed as solar air
heaters
d)
They act as alternate panels in case of failure
Answer: c
30.
Liquid heating
collectors are mainly used for
a)
heating water
b)
generating electricity
c)
cooking
d)
trapping sunlight
Answer: a
31.
is a glazing which limits the radiation and convection
heat losses.
a)
Absorber plate
b)
Selective surface
c)
Insulation
d)
Transparent cover
Answer: d
32.
What are
provided to minimize heat loss?
a)
Absorber plate
b)
Surface plate
c)
Insulation
d)
Casing
Answer: c
33.
Which part of
flat plate collectors is coated in black?
a)
Transparent cover
b)
Absorber plate
c)
Insulation
d)
Fins
Answer: b
34.
The frame
which contains all the parts is called
a) box
b)
plate
c)
enclose
d)
container
Answer: d
35. The use of biomass energy has the potential to greatly
reduce greenhouse gas emissions.
a)
True
b)
False
Answer: a
36. Mixing biomass with fossil fuels in conventional power
plants is referred to as
a) Agitation
b)
Infuse
c)
Co-firing
d)
Interbreed
Answer: c
37.
What is BTU
used to measure?
a)
Heat content
b)
Area
c)
Density
d)
Volume
Answer: a
38.The
average composition of Methane in Biogas is
a) 5%
b)
10-15%
c)
35-40%
d)
55-60%
Answer: d
39.The
average composition of carbondioxide in Biogas
is
a) 5%
b)
10-15%
c)
35-40%
d)
55-60%
Answer: c
40.
What does CNG stands?
a)
Converted natural gas
b)
Compressed natural gas
c)
Compressed Non-soluble
gas
d)
Compressed natural gasoline
Answer: b
41.The process which converts the cellulose into alcohols through fermentation is called as
a) pyrolysis
b)
hydrolysis
c)
photo-synthesis
d)
none of the above.
Answer: b
42.
Which of the
following has the lowest efficiency?
a)
Solar energy
b)
Wind energy
c)
Wave energy
d)
OTEC
Answer: d
43.
A continuous
movement of water in specific direction is called as
 |
a) float
b)
waves
c)
current
d)
tides
Answer: d
44.
When the sun
and moon are at right angles with respect to
earth,
occurs
a)
Spring tide
b)
neap tide
c)
moderate tide
d) none of the above
Answer: d
45.
One of the
disadvantages of fuel cell is
a)
Transportation
b)
portable devices
c)
cost
d) none of the above
Answer: c
46.
What is the
full form of VRA?
a)
Vibration resistant appliance
b) Vehicle
Refueling Appliances
c)
Volatile removal assembly
d)
Validated requirement
authority
Answer: b
47. A device for converting substances (chemically or
physically) into gas is called
a)
Gasifiers
b)
Biogas plants
c)
Draughts
d) Gas chambers
Answer: a
48.
Which is the
oldest and simplest type of gasifier?
a)
Counter current gasifier
b)
Cross draught gasifier
c)
Co-current gasifier
d)
Fluidized bed gasifier
Answer: a
49.
Which is the
gasifier that can be operated in small scale/amounts?
a)
Counter current gasifier
b)
Cross draught gasifier
c)
Co-current gasifier
d) Fluidized bed gasifier
Answer: b
50.
Which gasifier
has better tar converting capacity?
a)
Counter current gasifier
b)
Cross draught gasifier
c)
Co-current gasifier
d)
Fluidized bed gasifier
Answer: c
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