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# Physical Geography - MCQ Online Test (2)

## 29 Questions MCQ Test Geography for UPSC (Civil Services) Prelims | Physical Geography - MCQ Online Test (2)

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This mock test of Physical Geography - MCQ Online Test (2) for UPSC helps you for every UPSC entrance exam. This contains 29 Multiple Choice Questions for UPSC Physical Geography - MCQ Online Test (2) (mcq) to study with solutions a complete question bank. The solved questions answers in this Physical Geography - MCQ Online Test (2) quiz give you a good mix of easy questions and tough questions. UPSC students definitely take this Physical Geography - MCQ Online Test (2) exercise for a better result in the exam. You can find other Physical Geography - MCQ Online Test (2) extra questions, long questions & short questions for UPSC on EduRev as well by searching above.
QUESTION: 1

### Consider the following statements: Spring tides occur twice a month. There is a seven day interval between the spring tides and neap tides. Which of the above statements is/ are NOT correct?

Solution:

Rather, the term is derived from the concept of the tide "springing forth." Spring tides occur twice each lunar month all year long without regard to the season. Neap tides, which also occur twice a month, happen when the sun and moon are at right angles to each other.

There is a seven day interval between the spring tides and neap tides. At this time the sun and moon are at right angles to each other and the forces of the sun and moon tend to counteract one another.

QUESTION: 2

### Which of the following statement is NOT correct?

Solution:

Explanation: Major ocean currents are greatly influenced by the stresses exerted by the prevailing winds and coriolis force. The oceanic circulation pattern roughly corresponds to the earth’s atmospheric circulation pattern. The air circulation over the oceans in the middle latitudes is mainly anticyclonic (more pronounced in the southern hemisphere than in the northern hemisphere). The oceanic circulation pattern also corresponds with the same. At higher latitudes, where the wind flow is mostly cyclonic, the oceanic circulation follows this pattern.

QUESTION: 3

### Upward and downward movement of ocean water is known as the :

Solution:
QUESTION: 4

Which of the following has the highest proportion of water?

Solution:

Explanation: Oceans 97.25%, Ice Caps and Glaciers 2.05%, Groundwater 0.68%, Lakes 0.01%, Soil Moisture 0.005%, Atmosphere 0.001%, Streams and Rivers 0.0001%, Biosphere 0.00004%.

QUESTION: 5

Which of the following statements is NOT correct?

Solution:

Explanation: The continental shelf is the extended margin of each continent occupied by relatively shallow seas and gulfs. It is the shallowest part of the ocean showing an average gradient of 1° or even less. The shelf typically ends at a very steep slope, called the shelf break.

QUESTION: 6

Consider the following statements:

1. Seamount is a mountain with pointed summits, rising from the seafloor.
2. Seamounts are of coral origin.

Which of the above statements is/ are correct?

Solution:

Seamount It is a mountain with pointed summits, rising from the seafloor that does not reach the surface of the ocean. Seamounts are volcanic in origin. These can be 3,000-4,500 m tall. The Emperor seamount, an extension of the Hawaiian Islands in the Pacific Ocean, is a good example.

QUESTION: 7

Which of the following factors affect the distribution of temperature of ocean water?

Solution:

Explanation: The factors which affect the distribution of temperature of ocean water are Latitude, Unequal distribution of land and water, Prevailing wind and Ocean currents.

QUESTION: 8

Consider the following statements:

1. About 90 per cent of the total volume of water is found below the thermocline in the deep ocean.
2. In thermocline zone, temperatures approach 0° C

Which of the above statements is/ are NOT correct?

Solution:

Explanation: This boundary region, from where there is a rapid decrease of temperature, is called the thermocline. About 90 per cent of the total volume of water is found below the thermocline in the deep ocean. In this zone, temperatures approach 0° C.

QUESTION: 9

Which of the following factors affect ocean salinity?

Solution:

Explanation: Factors affecting ocean salinity are mentioned below:

(i) The salinity of water in the surface layer of oceans depends mainly on evaporation and precipitation.

(ii) Surface salinity is greatly influenced in coastal regions by the fresh water flow from rivers, and in Polar Regions by the processes of freezing and thawing of ice.

(iii) Wind, also influences salinity of an area by transferring water to other areas.

(iv) The ocean currents contribute to the salinity variations. Salinity, temperature and density of water are interrelated. Hence, any change in the temperature or density influences the salinity of water in an area.

QUESTION: 10

The actual amount of the water vapour present in the atmosphere is known as _______

Solution:

Explanation: The actual amount of the water vapour present in the atmosphere is known as the absolute humidity. It is the weight of water vapour per unit volume of air and is expressed in terms of grams per cubic metre.

QUESTION: 11

Which of the following INCORRECT about cirrus clouds?

Solution:

Explanation: Cirrus clouds are formed at high altitudes (8,000 - 12,000m). They are thin and detatched clouds having a feathery appearance. They are always white in colour.

QUESTION: 12

Which one of the following process is responsible for transforming liquid into vapour?

Solution:

Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.

QUESTION: 13

“The, air on being heated, becomes light and     rises up in convection currents. As it rises, it expands and loses heat and consequently, condensation takes place and cumulous clouds are formed. With thunder and lightening, heavy rainfall takes place but this does not last long.”The above paragraph shows which of the following type of rainfall?

Solution:

Explanation: The, air on being heated, becomes light and    rises up in convection currents. As it rises, it expands and loses heat and consequently, condensation takes place and cumulous clouds are formed. With thunder and lightening, heavy rainfall takes place but this does not last long. Such rain is common in the summer or in the hotter part of the day. It is very common in the equatorial regions and interior parts of the continents, particularly in the northern hemisphere.

QUESTION: 14

The Inter Tropical Convergence Zone normally occurs:

Solution:
QUESTION: 15

Which one of the following is the source region for the formation of air masses?

Solution:

Explanation : Air masses are formed when the air above huge homogeneous areas acquires the characteristics of the area. This leads to the air having little horizontal variations in form. Accordingly,

C is correct, as it is a cold, large and homogeneous mass of land.

A is incorrect, as the size of the forested areas are not large enough to create air-mass

B is incorrect, as Himalayas do not constitute a homogeneous platform.

D is incorrect due to regional variations across the Deccan Plateau.

QUESTION: 16

The direction of wind around a low pressure in northern hemisphere is:

Solution:
QUESTION: 17

​Cyclones are called “Willy-Willies” in

Solution:

Explanation: They are known as Cyclones in the Indian Ocean, Hurricanes in the Atlantic, Typhoons in the Western Pacific and South China Sea, and Willy-willies in the Western Australia.

QUESTION: 18

Consider the following statements about occluded front.

1. It occurs when an air mass is fully lifted above the land surface.
2. It occurs in middle latitudes.

Which of the above statements is/ are correct?

Solution:

Explanation: If an air mass is fully lifted above the land surface, it is called the occluded front. The fronts occur in middle latitudes and are characterised by steep gradient in temperature and pressure.

QUESTION: 19

The sun is directly overhead at noon on 21st June at:

Solution:

The correct option is Option C.
At that time, sun's rays are overhead at the tropic of cancer (23.5°N). The Tropic of Cancer passes through the middle of India. It remains till the end of May in India. Before summer solstice i.e., 21st June, monsoon starts in India which brings a cooling effect to the climate of India.

QUESTION: 20

The atmosphere is mainly heated by the:

Solution:
QUESTION: 21

Tropical cyclones do not form over equator. This is because

1.    Equator is a zone of wind convergence.

2.    The temperature over equator is too high.

3.    There are no fronts over equator.

Select the correct answer using the codes given below.

Solution:

Explanation: Tropical cyclone does not form over the equator because the coriolis force is zero at the equator. Even though equator is a zone of wind convergence, it has nothing to do with tropical cyclone as such. Temperature is highest north and south of equator and not exactly at equator. Fronts are required for formation of temperate cyclone and not tropical ones. So even though statement 3 is correct it is not a reason.

QUESTION: 22

With reference to laterite soil, consider the following statements:

1.    They are the result of intense leaching.

2.    They are poor in organic matter.

Which of the statements given above is/are correct?

Solution:

Explanation: Laterite soil is primarily found in the tropical regions which receive heavy seasonal rainfall. High rainfall encourages the leaching of soil where lime and silica are leached away and a soil rich in oxides of aluminum predominate and abundance laterite is called bauxite. Due to the presence of iron oxides the colour of laterite soil is basically red. This soil is poor in organic matter and lime content.

QUESTION: 23

Monsoon in India is said to be essentially pulsating in nature. This means

Solution:

Explanation: They occur in wet spells of few days duration at a time.

QUESTION: 24

Deltas of eastern India are shrinking due to

1.    Huge amount of sediments being deposited.

2.    Groundwater mining.

3.    Construction of large dams.

Select the correct answer using the codes given below.

Solution:

Explanation: Deltas shrink due to lack of sediments and not due to huge amount of sediments. A proliferation of large dams that starve deltas of sediment, groundwater mining that causes land compaction, and artificial levees that affect river courses, have been responsible for the subsiding of major Indian deltas including Ganga-Brahmaputra, Krishna-Godavari, Brahmani and Mahanadi

QUESTION: 25

With reference to International Date Line (IDL), consider the following statements:

1.    A traveler crossing the IDL from east to west gains a day.

2.    IDL is an imaginary straight line at 180 degree meridian.

Which of the statements given above is/are correct?

Solution:

Explanation: A traveler crossing the IDL from east to west loses a day. IDL is an imaginary zig zag line at 180 degree meridian. The International Date Line (IDL) is an imaginary line of longitude on the Earth’s surface located at about 180 degrees east (or west) of the Greenwich Meridian. The International Date Line isn’t a fixed line at all, but actually sort of follows the 180° longitude line, zigzagging its way through a bunch of small islands, territories and nations

QUESTION: 26

If the surface air pressure is 1,000 mb, the air pressure at 1 km above the surface will be:

Solution:

C is the correct option.
If the surface air pressure is 1,000 mb, the air pressure at 1 km above the surface will be: The air pressure decreases by 1 mb for every increase bof 10 m in height
Since, height increased = 1 km
Air pressure decrease by units = 1000/10 = 100 units

Hence, pressure at 1 km above will be
1000 - 100 = 900 mb

QUESTION: 27

Which one of the following is the source region for the formation of air masses?

Solution:

The correct option is Option C.
Air masses are formed when the air above huge homogeneous areas acquires the characteristics of the area. This leads to the air having little horizontal variations in form. Accordingly,
C is correct, as it is a cold, large and homogeneous mass of land.
A is incorrect, as the size of the forested areas are not large enough to create air-mass
B is incorrect, as Himalayas do not constitute a homogeneous platform.
D is incorrect due to regional variations across the Deccan Plateau.

QUESTION: 28

Which of the following affects atmospheric pressure?

Solution:

The pressure exerted by air on the surface of the earth is called as atmospheric pressure. The pressure varies from region to region.

QUESTION: 29

Which one of the following is the source region for the formation of air masses?

Solution:

Continental Polar air masses form over large, high- latitude land masses, such as northern Canada or Siberia. cP air masses are cold and extremely dry. Wintertime cooling over these land areas cause the atmosphere to become very stable.