Description : Choose the correct statement about inflammable substance from the following. They have a) low ignition temperature and cannot catch fire easily. b) high ignition temperature and can catch fire easily ... temperature and can catch fire easily d) high ignition temperature and cannot catch fire easily
Last Answer : c) low ignition temperature and can catch fire easily
Description : Increase in temperature due to excess of carbon dioxide in air which traps heat energy is known as _______ . a) global warming b)soot c)ash d)acid rain
Last Answer : a) global warming
Description : Magnesium ribbon on burning in air produces a) magnesium oxide ,water and light c) magnesium oxide and heat b) magnesium oxide , heat and light d) magnesium oxide, water and heat
Last Answer : b) magnesium oxide , heat and light
Description : A substance which reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance? a) iron nail b)glass c)stone piece d)wood
Last Answer : d)wood
Description : The material which on heating in presence of oxygen catches fire easily and produces heat and light energy is known as _________ material. a) combustible b)non-combustible c)conducting d)none
Last Answer : a) combustible
Description : On a cold winter night , the process sleeping in a room with closed door and windows with coal fire burning inside may die due to the excessive accumulation of a) nitrogen monoxide b) nitrogen dioxide c) carbon dioxide d) carbon monoxide
Last Answer : d) carbon monoxide
Description : The calorific value of fuel is expressed in unit called a) kilojoule per litre c) kilogram per millilitre b) kilogram per gram d) kilo joule per kilogram
Last Answer : d) kilo joule per kilogram
Description : On placing an inverted tumbler over a burning candle, the flame extinguishes after some – time . This is because of non –availability of a) oxygen b)water vapour c)carbon dioxide d)wax
Last Answer : a) oxygen
Description : The substance that does not burn with flame is a) LPG b)camphor c)dry grass d)charcoal
Last Answer : d)charcoal
Description : Which one of the following has highest calorific value? a) kerosene b)biogas c)LPG d)petrol
Last Answer : c)LPG
Description : The ________ zone of a candle flame is the hottest zone. a) innermost b)outermost c)middle d)none
Last Answer : b)outermost
Description : The _________ gas produced during burning of coal is responsible for causing acid rain . a) oxygen b)sulphur dioxide c)nitrogen d)water vapour
Last Answer : b)sulphur dioxide
Description : The lowest temperature which at which a substance catches fire is ________ temperature. a) ignition b)boiling c)freezing d)none
Last Answer : a) ignition
Description : ________ fuels produce least amount of harmful gases and do not leave behind solid residue on combustion. a) solid b)gaseous c)liquid d )semi-solid
Last Answer : b)gaseous
Description : The unit of calorific value of fuel is __________ . a) Kj /Kg b) J/Kg c)Kj /g d)J/g
Last Answer : a) Kj /Kg
Description : The middle zone of a candle flame is known as the ________ zone. a) luminous b)non-luminous c)wax d)burning
Last Answer : a) luminous
Description : _______ is highly poisonous gas produced as a result of incomplete combustion. a) oxygen b)carbon dioxide c)carbon mono oxide d)soot
Last Answer : c)carbon mono oxide
Description : _________ is a substance which undergoes spontaneous combustion. a) wood b)coal c)sodium d)cow dung cakes
Last Answer : c)sodium
Description : ________ present in air helps in combustion of fuel. a) oxygen b)nitrogen c)carbon-di-oxide d)carbon –mono-oxide
Description : Discuss in brief process of combustion in SI engines with a sketch.
Last Answer : Combustion In S I Engine According to Ricardo, There are three stages of combustion in SI Engine as shown in figure above 1. Ignition lag stage 2. Flame propagation stage 3. After ... combustion is known as after burning. This generally happens when the rich mixture is supplied to engine.
Description : Which of the following types of natural hazards have the highest potential to cause damage to humans? (A) Earth quakes (B) Forest fires (C) Volcanic eruptions (D) Droughts and Floods
Last Answer : (D) Droughts and Floods
Description : The pacific Ring of Fire is - (1) an area of constant forest fires in the Pacific islands (2) a volcanic belt around the Pacific (3) an area of intense heat in the Pacific (4) islands rich in fuel minerals in the pacific
Last Answer : (2) a volcanic belt around the Pacific Explanation: The Pacific Ring of Fire is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. It has ... of the world's earthquakes and 81% of the world's largest earthquakes occur along the Ring of Fire.
Description : The pacific Ring of Fire is (1) an area of constant forest fires in the Pacific islands (2) a volcanic belt around the Pacific (3) an area of intense heat in the Pacific (4) islands rich in fuel minerals in the pacific
Last Answer : a volcanic belt around the Pacific
Description : A forest exists somewhere on Earth. This forest has no life except for trees. After a storm, a tree was hit by lightning and falls.What sound would it make? -Riddles
Last Answer : None. Sound does not exist if it is unheard.
Description : Mistakes which may produce a very serious effect upon the final results arise due to (A) In attention (B) In experience (C) Carelessness (D) All of these
Last Answer : (D) All of these
Description : The systematic errors which persist and have regular effects in the performance of a survey operation are due to (A) Carelessness (B) Faulty instrument (C) Inattention (D) None of these
Last Answer : (B) Faulty instrument
Description : Pick up the correct statement from the following: (A) Mistakes arise from inattention, inexperience or carelessness (B) Systematic errors persist and have regular effects in the survey performances (C) Accidental errors occur inspite of every precaution is taken (D) All the above
Last Answer : (D) All the above
Description : How large and powerful can a lightning strike get?
Last Answer : Well they’re powerful enough to produce gamma rays and antimatter; on a scale of powerful terrestrial effects, that’s pretty potent in my book.
Description : What's the closest you have been to a lightning strike?
Last Answer : answer:Very close. My house got hit and that was insane to hear and feel that. Trees on my property have been blasted but the absolute craziest was a tree that got whacked 20 feet from my tent! I ... of my house 30 feet from my front porch. Watching it frame by frame is simply stunning to see.
Description : Why can't lightning strike the same place twice? -Geography
Last Answer : So after lightning strikes one place, it's probably safe from another strike. In reality, lightning can and will strike the same place twice, whether it be during the same storm or even centuries ... creates a stepped leader, or the lightning bolt, that travels downward until it reaches the ground.
Description : At what level in the atmosphere does lightning strike ?
Last Answer : Lightning strikes the troposphere of the atmosphere .
Description : When is it said, "Lightning strikes?" What does this saying mean?
Last Answer : This is often said about things that hit you completely unexpectedly. It can be either very good news or just very bad news.
Description : Can lightning strike a moving train?
Last Answer : Theoretically possible, though unlikely. Even if it does, nothing will happen to anyone. No need to worry.
Description : In the summer I go to hide in a wooden pergola in the garden. Can lightning strike her? There are several taller trees around.
Last Answer : Yes, even lightning can hit the pergola!
Description : Can it happen?
Last Answer : Can. Lightning can hit "anywhere" - it's just a measure of probability. If, for example, you do not have a taller building in the vicinity of that building (HV line ...), the probability that the lightning will "increase" increases ...
Description : In a thunderstorm the formula M t 5.1 Mt5.1 gives the approximate distance M M in miles from a lightning strike if it takes t t seconds to hear the thunder after seeing the lightning. If you are 8.9 m?
Last Answer : Need answer
Description : In what year is the cutting of forest trees canceled for the sake of industry ?
Last Answer : The deforestation was canceled in 1898 for the sake of industry .
Description : Afforestation is the process of – (1) clearing forests (2) planting more trees (3) cutting down trees (4) collecting forest resources
Last Answer : (2) planting more trees Explanation: Afforestation is the establishment of a forest or stand of trees in an area where there was no forest, Many governments and nongovernmental ... to create forests, increase carbon capture and sequestration, and help to anthropogenically improve biodiversity.
Description : Forest fires are going nuts. Any ideas to help me breathe in my bedroom?
Last Answer : Go to a pub or store open 24hours with an air fliter. You can have one good breath of clean air from the fridge. Sorry that you have to put up with the smoke. I would keep the Windows closed. The wet towels doesn’t work. Tomorrow buy an air filter..
Description : Northern Californians are you dying from all the smoke from the Yosemite and Forest Hill fires?
Last Answer : I haven’t noticed much in the Bay Area, but I’m going to be going to Sacramento tomorrow and I know that the smoke often gathers in the valley. I really hope Yosemite Valley isn’t threatened…
Description : Why is it solely MY responsibility to prevent forest fires?
Last Answer : We don’t need no water, let the mfer buuurrrnnnn. I always did think Smokey was a pompous, patronizing buffoon.
Description : what is recommendation for pine tree spacing to control forest fires
Last Answer : Need Answer
Description : The 'Pacific ring of fire ' is associated with : (1) oil well fires (2) thermal power station (3) volcanoes and earthquakes (4) forest fires
Last Answer : (3) volcanoes and earthquakes Explanation: Pacific ring of fire is an area where a large number of earthquakes and voicanic eruptions occur in the basin of the Pacific ocean.
Description : The 'Pacific Ring of Fire' is associated with – (1) oil well fires (2) thermal power station (3) volcanoes and earthquakes (4) forest fires
Last Answer : (3) volcanoes and earthquakes Explanation: The Pacific Ring of Fire is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. In a 40,000 km ... of the world's earthquakes and 81% of the world's largest earthquakes occur along the Ring of Fire.
Description : Natural sources of air pollution are – (1) Forest fires (2) Volcanic eruptions (3) Dust storm (4) Smoke from burning dry leaves
Last Answer : (2) Volcanic eruptions Explanation: Some of the natural sources of air pollution are ground dust, salt spray from oceans, volcanic eruptions, hydrogen sulfides from natural sources, etc. ... and ash from volcanic eruptions blacken the skies and increase the background pollution levels for years.
Description : Forest fires:
Last Answer : Forest fire is one of the major causes for deforestation. Due to human interruption and rise in ambient temperature, forest fire happens often nowadays. Thus, due to forest fire thousands of forest area gets destructed
Description : Natural sources of air pollution are (1) Forest fires (2) Volcanic eruptions (3) Dust storm (4) Smoke from burning dry leaves
Last Answer : Volcanic eruptions
Description : The ‘Pacific Ring of Fire’ is associated with (1) oil well fires (2) thermal power station (3) volcanoes and earthquakes (4) forest fires
Last Answer : volcanoes and earthquakes
Description : Engineering disaster is simply referred to those disasters when it is caused by an engineering failure like – (a) Design flaws or materials failures (b) Insufficient knowledge or underestimations (c) Carelessness or negligence (d) All the above.
Last Answer : (d) All the above.
Description : I'm white, and used for cutting and grinding. When I'm damaged, humans usually remove me or fill me. For most animals I am a useful tool.What am I? -Riddles
Last Answer : A tooth!