Question 1
What is angle subtended by sun on earth in degrees?
A. About 0.5 degrees
B. About 1 degree
C. About 35 degrees
D. About 5 degrees
View Answer
Question 2
Which month is the earth closes to the sun?
A. February
B. March
C. December
D. January
View Answer
Question 3
What is the inclination of earth’s axis in degrees?
A. 37
B. 53
C. 23.5
D. 10
View Answer
Answer: C
Explanation: Earth’s axis is inclined at angle of 23.5 degrees. This inclination is with respect to the plane of earth’s orbit around the sun. After a cycle of about 40000 years, the tilt of the axis varies between 22.1 and 24.5 degrees.
Question 4
Complete the following reaction.
A. CH2O + O2
B. CO2 + O2
C. H + CO2 + O2
D. CH2O + H2O + O2
View Answer
Answer: Option 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.
Answer: Option 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.
Question 5
HHW stands for ____________
A. High and Low water
B. High Level Waste
C. Heated Low Level water
D. High and Low Waste
View Answer
Answer: Option 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.
Answer: Option 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.
Question 6
In what form is solar energy is radiated from the sun?
A. Ultraviolet Radiation
B. Infrared radiation
C. Electromagnetic waves
D. Transverse waves
View Answer
Answer: Option 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.
Answer: Option 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.
Question 7
Insolation is less ____________
A. when the sun is low
B. when the sun right above head
C. at night
D. at sun rise
View Answer
Answer: Option 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.
Answer: Option 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.
Question 8
Oil is estimated to last for ________ more.
A. 100 years
B. 500 years
C. A decade
D. 800 years
View Answer
Answer: Option 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.
Answer: Option 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.
Question 9
Solar radiation received at any point of earth is called ______________
A. Insolation
B. Beam Radiation
C. Diffuse Radiation
D. Infrared rays
View Answer
Answer: Option 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.
Answer: Option 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.
Question 10
Solar radiation which reaches the surface without scattering or absorbed is called _____________
A. Beam Radiation
B. Infrared radiation
C. Ultraviolet radiation
D. Diffuse radiation
View Answer
Answer: Option 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.
Answer: Option 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.
Question 11
The scattered solar radiation is called ____________
A. Direct Radiation
B. Beam Radiation
C. Diffuse radiation
D. Infrared Radiation
View Answer
Answer: Option 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.
Answer: Option 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.
Question 12
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
View Answer
Answer: Option 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.
Answer: Option 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.
Question 13
What is the rate of solar energy reaching the earth surface?
A. 1016W
B. 865W
C. 2854W
D. 1912W
View Answer
Answer: Option 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.
Answer: Option 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.
Question 14
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
View Answer
Answer: Option 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.
Answer: Option 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.
Question 15
What is unit of nuclear radiation?
A. Reaumur
B. Roentgen
C. Rankine
D. Pascal
View Answer
Answer: Option 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.
Answer: Option 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.
Question 16
Which is most common source of energy from which electricity is produced?
A. Hydroelectricity
B. Wind energy
C. Coal
D. Solar energy
View Answer
Answer: Option 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.
Answer: Option 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.
Question 17
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
View Answer
Answer: Option 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.
Answer: Option 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.
Question 18
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
View Answer
Answer: Option 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.
Answer: Option 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.
Question 19
Around how much percentage, the incident radiant flux can be absorbed by the materials present on earth?
A. 48%
B. 37%
C. 42%
D. 50%
View Answer
Answer: Option A
Explanation:
The radiation which is being spread around all over the world is set to possess an incident flux density of 1367 W / m2. This is divided into certain classes in which 48% of this is absorbed by the earth’s surface materials.
Question 20
Determine the absolute temperature of the body from Stefan – Boltzmann law if spectral existence of the body is 3.55 * 10-10 W /sq. m.
A. 19.58 K
B. 1.58 K
C. 15.58 K
D. 1.85 K
View Answer
Answer: Option B
Explanation:
The Stefan – Boltzmann law can be given as, M = σ*T4. On substitution, we get3.55*10-10 = 5.66*10-11* T4T = 1.58 K.
Question 21
Determine the spectral existence of a black body if the absolute temperature can be given as 300K.
A. 1968*10-11 W/sq. m
B. 1689*10-11 W/sq. m
C. 6298*10-11 W/sq. m
D. 1698*10-11 W/sq. m
View Answer
Answer: Option D
Explanation:
By using Stefan – Boltzmann law, the spectral existence of a black body can be determined. The formula can be given as M = σ*T4. On substitution, we getM = 5.66*10-11 * 300M = 1698*10-11 W/sq. m.
Question 22
Determine the spectral existence of a body by using plank’s law, if the wave length is given as 456m and the absolute temperature is 765K.
A. 3.6*1030 W / sq. m
B. 4.6*1030 W / sq. m
C. 6.6*1030 W / sq. m
D. 3.6*1030 W / sq. m
View Answer
Question 23
Diameter of sun can be given as ____________
A. 1.39 * 107 km
B. 1.9 * 106 km
C. 1.39 * 106 km
D. 1.39 * 1016 km
View Answer
Answer: Option C
Explanation:
Sun is the most prominent star among all the stars available. The radiation emitted by sun can used in case of passive remote sensing. The diameter of the sun can be estimated as 1.39 * 106 km.
Question 24
Find the value of λ, if the temperature of the body is given as 560K.
A. 4.16*10-14 m
B. 6.16*10-14 m
C. 5.16*10-14 m
D. 5.16*10-4 m
View Answer
Answer: Option C
Explanation:
From Wien’s displacement law,λ = A / T. here, A is the Wien’s constant = 2.89*10-11mK. On substitution, we getλ = 2.89*10-11 / 560λ = 5.16*10-14 m.
Question 25
From Wien’s displacement law, determine the absolute temperature if wave length is given as 0.05m.
A. 7.8*10-3 K
B. 75.8*10-3 K
C. 57.25*10-35 K
D. 57.8*10-3 K
View Answer
Answer: Option D
Explanation:
The formula for Wien’s displacement law can be given asλ = A / T. On substitution, we get0.05 = 2.89*10-3 / TT = 57.8*10-3 K.
Question 26
The energy radiated from sun in visible region will be around ____________
A. 43%
B. 45%
C. 47%
D. 50%
View Answer
Answer: Option A
Explanation:
The radiation emitted from sun will be in a huge manner. Emitted radiation can be visualized up to some extent and remaining is not visible to naked eye. It can be estimated that 43% can be visualized and remaining 48% is transferred to IR region.
Question 27
The value of solar constant can be given as __________
A. 1637 W / m2
B. 1367 W / m2
C. 136 W / m2
D. 3167 W / m2
View Answer
Answer: Option B
Explanation:
The energy received from the sun can be distributed all over the surface of earth and by doing this an average incident flux density can be established. It is determined as solar constant, having a value of 1367 W / m2 .