SSC CGL Geography – Hydrosphere – Oceans, Currents & Tides – Level 1 · Warm-up · Tier I Level

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SSC CGL Geography – Hydrosphere – Oceans, Currents & Tides – Level 1 · Warm-up · Tier I Level – 12 questions, subject: Geography – India & World. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
Which ocean is S-shaped?

Correct Answer: B [Atlantic Ocean]

Explanation:

The Atlantic – second largest and the busiest for trade.

2.  
The smallest and shallowest ocean is the:

Correct Answer: A [Arctic Ocean]

Explanation:

Around the North Pole.

3.  
The only ocean named after a country is the:

Correct Answer: C [Indian Ocean]

Explanation:

Named after India.

4.  
The average salinity of ocean water is about:

Correct Answer: D [35 parts per thousand]

Explanation:

35 g of salt in 1 kg of sea water.

5.  
The depth of the ocean floor is mapped mainly by:

Correct Answer: C [echo-sounding (sonar)]

Explanation:

Sound waves are sent down and their echo is timed.

6.  
The Labrador Current is:

Correct Answer: B [a cold current of the Atlantic Ocean]

Explanation:

It flows south past Labrador and meets the warm Gulf Stream near Newfoundland.

7.  
The Oyashio, which flows off northern Japan, is a:

Correct Answer: D [cold current of the Pacific Ocean]

Explanation:

Cold Oyashio meets the warm Kuroshio off Japan.

8.  
The coral atolls of India are found in:

Correct Answer: A [Lakshadweep]

Explanation:

Lakshadweep islands are coral atolls.

9.  
Fill in the blankLines joining places of equal salinity are called ____.

Correct Answer: A [isohalines]

Explanation:

Halo = salt.

10.  
El Niño refers to an unusual warming of the surface water of the:

Correct Answer: D [central and eastern Pacific Ocean]

Explanation:

Off Peru – it often weakens the Indian monsoon.

11.  
Tides are caused mainly by the:

Correct Answer: B [gravitational pull of the Moon]

Explanation:

The Sun's pull is smaller (about half).

12.  
One-line recallthe deepest part of the Atlantic Ocean is the ____ Trench.

Correct Answer: C [Puerto Rico]

Explanation:

Puerto Rico Trench – Atlantic; Mariana Trench (Challenger Deep) – Pacific.

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 Geography – India & World book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-geography-india-world

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