Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

The following pollutant is not contained in the vehicular exhaust emissions:

  1. Lead

  2. Ammonia

  3. Carbon monoxide

  4. Particulate matter
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ammonia is not a significant component of vehicular exhaust emissions. The primary pollutants from vehicle exhaust include lead (from leaded gasoline, now mostly phased out), carbon monoxide (from incomplete combustion), and particulate matter (soot and fine particles). Ammonia emissions primarily come from agricultural activities and industrial processes, not typical automobile exhaust systems.

Multiple choice general knowledge science & technology

Environmental friendliness of a vehicle could be measured by the amount of pollutants it emits per passenger per kilometre travelled.Rate the environmental friendliness (1=best & 4=worst) of the following vehicles as per this criterion: Car : scooter : bus : bicycle

  1. 4:3:2:1

  2. 2:3:4:1

  3. 3:2:4:1

  4. 4:2:3:1
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The ranking 4:3:2:1 (Car:Scooter:Bus:Bicycle) is correct based on pollutants per passenger per kilometer. Bicycles produce no direct emissions (rank 1, best). Buses carry many passengers, reducing per-person pollution (rank 2). Scooters are more fuel-efficient than cars but carry only 1-2 people (rank 3). Cars carrying 1-4 passengers have the highest per-passenger emissions (rank 4, worst).

Multiple choice general knowledge science & technology

Earlier, leaded petrol used to be the most widespread, though easily preventable, source of urban air pollution in the world. According to WHO (World Health Organization), 15–18 million children in the developing countries are already suffering from permanent brain damage due to lead poisoning. Why is tetra-ethyl lead added to petrol?

  1. It prevents engine knocking

  2. Reduces vehicular emissions

  3. Increases life of motor tyres

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tetra-ethyl lead was added to petrol as an anti-knock agent - it prevents premature fuel ignition (engine knocking) by increasing the octane rating. Lead additives do not reduce emissions or improve tire life; they were phased out due to severe neurological health impacts.

Multiple choice general knowledge science & technology

Bhopal gas tragedy struck in the year 1984 due to the leakage of the following gas:

  1. methyl-iso-cyanate

  2. nitrous oxide

  3. methane

  4. carbon monoxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Bhopal gas tragedy of 1984 was caused by methyl isocyanate (MIC) gas leakage from Union Carbide pesticide plant. MIC is highly toxic and caused immediate deaths and long-term health issues. The other options are common gases but not involved in this disaster.

Multiple choice general knowledge science & technology

SPM stands for

  1. Suspended Particulate Matter

  2. Standard Particles Material

  3. Suspended Particles Material

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In environmental science and air quality monitoring, SPM stands for Suspended Particulate Matter, referring to small solid or liquid particles suspended in the atmosphere.

Multiple choice general knowledge science & technology

Why would you prefer to ride a bicycle rather than your friend’s scooter?

  1. you get exercise on a bicycle

  2. you will not pollute

  3. it is cheaper

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Riding a bicycle provides exercise (option A), produces zero emissions (option B), and is cheaper than operating a motor scooter (option C). All three benefits are valid, making 'all of the above' the correct answer.

Multiple choice general knowledge science & technology

A device is fitted to motor vehicles to chemically reduce some gases produced by internal combustion engines like NOx, CO, and HC into less harmful products. Name this device.

  1. Carburetor

  2. Catalytic converter

  3. 2-stroke engines

  4. Tail pipe
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A catalytic converter converts harmful gases like NOx, CO, and hydrocarbons (HC) into less harmful substances (N2, CO2, H2O) through chemical reactions using catalyst metals. Carburetors mix fuel and air; 2-stroke is an engine type; tail pipe is just the exhaust outlet.

Multiple choice general knowledge science & technology

Following is the most widely discussed impact of climate change:

  1. Deforestation

  2. Soil erosion

  3. Increase in average sea level

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sea level rise is one of the most widely discussed and measured impacts of climate change because it directly affects coastal communities, ecosystems, and human settlements globally. While deforestation and soil erosion are serious environmental concerns, they are not as directly or prominently linked to climate change in public discourse as sea level rise.