Description : Got a DVD stuck in my Macbook, will the motor burn and start a fire?
Last Answer : You’re fine. And there are lots of ways to get it out.
Description : If you throw boiling water on someone who is on fire, will it burn them?
Last Answer : Yes. It will make the burn worse.
Description : If you do any work, you will have to burn in the fire of hell for 28 million years ?
Last Answer : If you perform the prayer once without any excuse.
Description : Is it permissible to burn harmful animals in fire ? Our village house is infested with ants during the rainy season. Then they are killed with hot ashes from the stove. Then the broom is given. Is it a sin ?
Last Answer : It is not permissible to burn any harmful animal in fire. The Prophet (peace and blessings of Allaah be upon him) said : وَإِنَّ النَّارَ لاَ يُعَذِّبُ بِهَا আল্লাহِلَّا اللَّهُ No one has the right to ... be permissible ; Rather it would be a sin. (Almuhitul Burhani 6/94 ; Fatawa Hindi 6/361)
Description : How will a fire not burn without nitrogen in the air?
Last Answer : This is not true. It is oxygen in the air which is needed.Burning is a chemical reaction in which the fuel reacts withoxygen.
Description : (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn Explanation: Water is not effective in extinguishing a fire caused by petrol because water and ... . Water cannot generally be used to extinguish a gasoline fire, unless used in a fine mist.
Last Answer : "All the four quantum numbers of two electrons in an atom are not the same." It is the law of (1) Hund’s (2) Exclusion Principle of Pauli (3) Uncertainty Principle of Giesenberg (4) Avogadro’s law
Description : Pick out the wrong statement. (A) LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of metals (B) The minimum temperature, at which a petroleum oil vapor catches ... about 30-50 Nm3 of gas (D) Maximum yield of naphthalene is obtained on distillation of crude oil
Last Answer : (B) The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point
Description : Water is not effective in extinguishing a fire caused by petrol because (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are ... 4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn
Last Answer : water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn
Description : Pick up the correct statement from the following: (A) Sand stones may be divided into calcareous, siliceous and ferruginous sand stones (B) Concrete using sand stones, cracks due to excessive shrinkage (C) Broken bricks produce a concrete having good fire resisting qualities (D) All the above
Last Answer : Answer: Option D
Description : Pick up the correct statement from the following: (A) The free quartz suddenly expands at a temperature lower than 600°C (B) The lime stone resists fire upto about 800°C and at higher temperature it splits into ... (C) The sand stone with silicates resist a fire in a better way (D) All the above
Description : Which of the following has more fire resisting characteristics? (A) Marble (B) Lime stone (C) Compact sand stone (D) Granite
Last Answer : Answer: Option C
Description : Dry powder fire extinguishers contain (1) sand (2) sand and sodium carbonate (3) sand and potassium carbonate (4) sand and sodium bicarbonate
Last Answer : sand and sodium bicarbonate
Description : It is dangerous to observe solar eclipse with naked eyes because – (1) Infrared radiations from sun burn our retina (2) Ultraviolet radiations from Sun burn our retina (3) All radiations from sun initiate chemical reactions in eyes (4) Cosmic rays reach eyes more during the eclipse
Last Answer : (2) Ultraviolet radiations from Sun burn our retina Explanation: The solar radiation that reaches the surface of Earth ranges from ultraviolet (UV) radiation at wavelengths longer than 290 nm to radio ... of the Sun during an eclipse is for the development of "eclipse blindness" or retinal burns.
Description : It is dangerous to observe Solar eclipse with naked eyes because (1) Infrared radiations from sun burn our retina (2) Ultraviolet radiations from Sun burn our retina (3) All radiations from sun initiate chemical reactions in eyes (4) Cosmic rays reach eyes more during the eclipse
Last Answer : Ultraviolet radiations from Sun burn our retina
Description : Why does falling on sand from the same height cause less injury than hard floor ?
Last Answer : Falling on sand from the same height causes less injury than hard floor. Reason: When a person falls on a hard floor from above, the floor pushes backwards as a reaction on the person. Since the floor ... the person move a little downhill easily. So it hurts less to fall on sand than on hard floor.
Description : Which one of the following reflects back more sunlight as compared to other three? (1) Sand desert (2) Land covered with fresh snow (3) Prairie land (4) Paddy crop land
Last Answer : (2) Land covered with fresh snow Explanation: Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
Last Answer : Land covered with fresh snow