| Question (1):
Solar constant is _______. |
| 1. |
140 Wm-2 |
| 2. |
1.4 Wm-2
|
| 3. |
1.4 kWm-2 |
| 4. |
1.4 MWm-2 |
|
| Ans: 3 |
|
| Question (2):
The radiation in the sunlight that gives us the feeling of hotness is ______. |
| 1. |
visible radiation |
| 2. |
infra-red
|
| 3. |
red |
| 4. |
ultra-violet |
|
| Ans: 2 |
|
| Question (3):
Which of the following is not a bio-mass source? |
| 1. |
Gobar gas |
| 2. |
Coal
|
| 3. |
Wood |
| 4. |
Nuclear energy |
|
| Ans: 4 |
|
| Question (4):
The energy which is not derived from the sun is ______. |
| 1. |
bio-mass |
| 2. |
fossil fuels
|
| 3. |
nuclear energy |
| 4. |
geo-thermal energy |
|
| Ans: 3 |
|
| Question (5):
Harmful radiation emitted by the sun is ______. |
| 1. |
visible |
| 2. |
infra-red
|
| 3. |
ultra-violet |
| 4. |
radio waves |
|
| Ans: 3 |
|
| Question (6):
A substance which produces a lot of heat on burning is called ______. |
| 1. |
oxidising agent |
| 2. |
biogas
|
| 3. |
biomass |
| 4. |
fuel |
|
| Ans: 4 |
|
| Question (7):
Fuel formed under the earth's surface by the decomposition of organic matter is called ______. |
| 1. |
organic fuel |
| 2. |
biogas
|
| 3. |
fossil fuel |
| 4. |
under ground fuel |
|
| Ans: 3 |
|
| Question (8):
Which of the following causes the least pollution when burnt? |
| 1. |
Petrol |
| 2. |
Diesel
|
| 3. |
Coal |
| 4. |
Natural gas |
|
| Ans: 4 |
|
| Question (9):
The main constituent of LPG is ______. |
| 1. |
methane |
| 2. |
butane
|
| 3. |
hydrogen |
| 4. |
propane |
|
| Ans: 2 |
|
| Question (10):
The main constituent of CNG is ______. |
| 1. |
methane |
| 2. |
butane
|
| 3. |
ethane |
| 4. |
propane |
|
| Ans: 1 |
|
| Question (11):
Which of these is not a renewable source of energy? |
| 1. |
The sun |
| 2. |
Natural gas
|
| 3. |
Wind |
| 4. |
Ocean tidal energy |
|
| Ans: 2 |
|
| Question (12):
The radiations absorbed by ozone layer are ______. |
| 1. |
infra-red |
| 2. |
ultra-violet
|
| 3. |
visible |
| 4. |
gamma rays |
|
| Ans: 2 |
|
| Question (13):
The radiations emitted by a hot furnace are ______. |
| 1. |
ultra-violet |
| 2. |
infra-red
|
| 3. |
X-rays |
| 4. |
micro waves |
|
| Ans: 2 |
|
| Question (14):
The radiations emitted by the sun and responsible for the cause of skin cancer are ______. |
| 1. |
infra-red |
| 2. |
X-rays
|
| 3. |
micro-waves |
| 4. |
ultra-violet |
|
| Ans: 4 |
|
| Question (15):
The efficiency of the solar cooker can be increased by placing a ______. |
| 1. |
plane mirror |
| 2. |
convex mirror
|
| 3. |
convex lens |
| 4. |
concave lens |
|
| Ans: 1 |
|
| Question (16):
The maximum temperature that can be attained in a box-type solar cooker is ______. |
| 1. |
200 oC |
| 2. |
140 oC
|
| 3. |
80 oC |
| 4. |
250 oC |
|
| Ans: 2 |
|
| Question (17):
A solar cell is made up of ______. |
| 1. |
silicon |
| 2. |
titanium
|
| 3. |
magnesium |
| 4. |
teflon |
|
| Ans: 1 |
|
| Question (18):
Which of the following is not combustible? |
| 1. |
oxygen |
| 2. |
hydrogen
|
| 3. |
butane |
| 4. |
methane |
|
| Ans: 1 |
|
| Question (19):
The lid of the solar cooker is made up of ______. |
| 1. |
plastic sheet |
| 2. |
black sheet
|
| 3. |
plane mirror |
| 4. |
glass |
|
| Ans: 4 |
|
| Question (20):
In a solar panel, the metal used is ______. |
| 1. |
gold |
| 2. |
copper
|
| 3. |
silver |
| 4. |
nickel |
|
| Ans: 3 |
|
| Question (21):
A solar cell converts ______. |
| 1. |
heat energy into electrical energy |
| 2. |
solar energy into electrical energy
|
| 3. |
heat energy into light energy |
| 4. |
solar energy into light energy |
|
| Ans: 2 |
|
| Question (22):
Floating generators are used in the sea to harness ______. |
| 1. |
tidal energy |
| 2. |
wave energy
|
| 3. |
hydel energy |
| 4. |
energy from OTEC power plant |
|
| Ans: 2 |
|
| Question (23):
The temperature difference between the upper layers and the deeper layers of the ocean should be ______ to install an OTEC power plant. |
| 1. |
40 oC |
| 2. |
50 oC
|
| 3. |
20 oC |
| 4. |
30 oC |
|
| Ans: 3 |
|
| Question (24):
The molten material mixed with gases in the mantle of the earth is called ______. |
| 1. |
core |
| 2. |
lava
|
| 3. |
geyser |
| 4. |
magma |
|
| Ans: 4 |
|
| Question (25):
The scientist who first carried out critical nuclear fission reactionis ______. |
| 1. |
Otto Hahn |
| 2. |
Enrico Fermi
|
| 3. |
Hans Bethe |
| 4. |
Einstein |
|
| Ans: 2 |
|
| Question (26):
The source of energy of the sun is ______. |
| 1. |
nuclear fission |
| 2. |
chemical reaction
|
| 3. |
nuclear fusion |
| 4. |
photoelectric effect |
|
| Ans: 3 |
|
| Question (27):
India exploded her first underground nuclear device at ______. |
| 1. |
Kota |
| 2. |
Ranchi
|
| 3. |
Jaipur |
| 4. |
Pokhran |
|
| Ans: 4 |
|
| Question (28):
The energy of a thermal neutron is about ______. |
| 1. |
0.025 ev |
| 2. |
0.25 ev
|
| 3. |
0.0025 ev |
| 4. |
0.00025 ev |
|
| Ans: 1 |
|
| Question (29):
The fuel used in the nuclear reactor is ______. |
| 1. |
Cadmium |
| 2. |
Radium
|
| 3. |
Uranium |
| 4. |
Thorium |
|
| Ans: 3 |
|
| Question (30):
Nuclear fusion reactions happens spontaneously in ______. |
| 1. |
the core of the earth |
| 2. |
the commercial nuclear reactor
|
| 3. |
the atmosphere of the sun |
| 4. |
the eruption of a volcano |
|
| Ans: 3 |
|
