Tag: evs - i

Quizzes (164) Questions (1366)

Questions Related to evs - i

Multiple choice evs - i forests: our lifeline afforestation deforestation and its effect deforestation

An anti-forest measure is

  1. Afforestation

  2. Selective grazing

  3. Clearing forest

  4. Selective felling
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Destruction of forest cover is called as deforestation. An important anti-forest measure is clearing forest. Important reasons for deforestation are a land requirement for cultivation, hydroelectric projects, human settlements, the requirement of wood and timber, mining and quarrying etc.

So, the correct answer is option C.

Multiple choice evs - i forests: our lifeline afforestation deforestation and its effect deforestation

One of the main causes of the silting of big dams is?

  1. Deforestation in the catchments area

  2. Increase in the population of wild animals in the forests around the dam

  3. Insufficient rainfall

  4. Excessive evaporation of water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When forests in the catchment area are removed, soil erosion increases significantly. This eroded soil is washed into rivers and dams, leading to the accumulation of sediment, known as silting.

Multiple choice evs - i forests: our lifeline afforestation deforestation and its effect deforestation

Decrease in tropical forests during the past century was

  1. 40%

  2. 50%

  3. 60%

  4. 10%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Tropical rainforests occur in areas of tropical regions in which there is no dry season – all months have average precipitation of at least 60 mm. During early times it use to cover  40% of the forest land now this number is affected by the deforestation.
So, the correct answer is '40%'
Multiple choice evs - i forests: our lifeline afforestation deforestation and its effect deforestation

Waldsterben is

  1. Decline in forests

  2. Development of fog

  3. Harm to sculptures, statues and buildings

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Waldsterben refers to the mass death of the trees wherein, the peripheral parts of the plants are killed and slowly the entire forest population dwindles. It was first reported in Germany in the early 1980s. The atmospheric pollution was the main cause of such deaths of trees. Tropospheric ozone is the secondary pollutant. Nitrogen oxides and sulphur oxides are released by the industrial emissions and vehicular exhausts. Acid rain is the chemical reaction between these oxides and water to form their respective acids that precipitate with the rains. The pollutants have severe effects on the trees.

Hence, the correct answer is 'Decline in forests'.

Multiple choice evs - i food components simple test for nutrients test for nutrients energy from different food components

Which of the following is/are incorrect statement(s)?
i. Fried food is good for health.
ii. Vitamins protect us from diseases.
iii. Water helps in digestion of food.
iv. Spices are obtained from animals.

  1. i and iv

  2. ii and iii

  3. iv only

  4. i and iii
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fried foods contain high fat, calories and salt. They are cooked in hydrogenated fats(transfats). Eating them can put at a higher risk of developing diseases like heart diseases, diabetes etc.

spices are the substances which are used for colouring, preserving and flavouring the food. They may be in the form of seeds, fruit, leaves, barks etc. They are naturally obtained from plants.
So, the correct option is 'i and iv'.

Multiple choice evs - i community health and hygiene drugs and its types drug, tobacco and alcohol consumption innate and learned behaviour

Nerve depressants

  1. Increase the nerve impulses.

  2. Are only sedatives and they decrease BP.

  3. Are sedatives and lower the blood pressure.

  4. Are both sedatives and tranquilizers.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nerve depressants or CNS depressants are the substances that slow the brain activity. This includes sedatives and tranquilizers. This makes them useful for treating anxiety and sleep disorders.
Thus, the correct answer is option (D), 'Are sedatives and tranquillisers both'.

Multiple choice evs - i community health and hygiene drugs and its types drug, tobacco and alcohol consumption innate and learned behaviour

Caffeine present in the coffee is a/an

  1. Sedative

  2. Antidepressant

  3. Stimulant

  4. Psychadelic
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Caffeine is a central nervous system stimulant of the methylxanthine class of psychoactive drugs. It is a bitter, white crystalline purine, a methylxanthine alkaloid, and thus closely related chemically to the adenine and guanine contained in DNA and RNA.
So, the correct answer is option C.