Tag: safety and first aid

Questions Related to safety and first aid

Biochemical Oxygen Demand (BOD) in a river water :

evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Increases when sewage gets mixed with river water

  2. Remains unchanged when algal bloom occurs

  3. has no relationship with concentration of oxygen in the water

  4. Gives a measure of Salmonella in the water

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Correct Option: A

What happens when rain falls on soil without vegetational cover?

evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Rain water percolates in soil efficiently

  2. Rain water causes loss of surface soil

  3. Rain water leads to fertility of the soil

  4. Rain water does not cause any change in soil

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Correct Option: B
Explanation:

Vegetation cover on the ground helps to hold the soil in place. It also helps in percolating water into the deeper layers of the soil. The absence of vegetational cover may lead to soil erosion.

So, the correct answer is option B.

Abundant source of inonazite sands are found on the sea shores of

evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Maharashtra

  2. West Bengal

  3. Tamil Nadu

  4. Kerala

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Correct Option: D

What are examples of fresh water?

evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Lakes, streams, rivers and Glaciers

  2. Sea water

  3. Ocean water

  4. Pacific Ocean water

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Correct Option: A

When the air temperature increases, the saturation vapor pressure will:

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Increase

  2. Decrease

  3. Remain the same

  4. Vary over an increasingly broad range of values

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Correct Option: A

A ___________ is formed due to the collection of water in a natural basis or depression in a mountainous area or in plains.

evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Lake

  2. Stream

  3. Pond

  4. Spring

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Correct Option: A

Which water can be consumed by humans?

evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Ocean water

  2. Sea water

  3. Fresh water

  4. Marine water

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Correct Option: C

A slow moving river of solid ice is called

evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. delta

  2. watershed

  3. glacier

  4. crevasses

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Correct Option: C

Red sea is an example of a _____________  structure.

evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Folded

  2. lava

  3. Faulted

  4. residual

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Correct Option: C

Water vapor is:

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. A gas

  2. A cloud droplet

  3. A rain drop

  4. A snowflake

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Correct Option: A