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Sunday, 4 February 2018

UPSC CDS Answer Key 2018 with Questions for Paper 2

  By GK Planet Team       Sunday, 4 February 2018

CDS-1 2018 General Knowledge Solved Paper | Answer Key

Q.21) Which of the following represents a relation for heat lost = heat gained ?
a) Principle of thermal equilibrium
b) Principle of colors
c) Principle of calorimetry
d) Principle of vaporization
The objects will approach the same temperature, and in the absence of loss to other objects, they will then maintain a constant temperature. They are then said to be in thermal equilibrium. Thermal equilibrium is the subject of the Zeroth Law of Thermodynamics.
Q.22) Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes
a) 2R
b) R/2
c) 5/4 R
d) ¾ R

Q.23) When the Sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible for this observation is
a) reflection of light
b) refraction of light
c) dispersion of light
d) scattering of light
According to Rayleigh''s law, the intensity of scattered light varies inversely as the fourth power of its wavelength. Sunlight consists of seven colours. Of these, red has the maximum wavelength. During sunrise and sunset, the rays have to travel a larger part of the atmosphere because they are very close to the horizon.Therefore, light other than red is mostly scattered away. Most of the red light, which is the least scattered, enters our eyes. Hence, the sun and the sky appear red.
Q.24) Match List-I with List-II and select the correct answer using the code given below the Lists :
List-I
[Cloud]
A. Cirrus
B. Stratus
C. Nimbus
D. Cumulus
List-II
[Characteristic]
1. Rain giving
2. Feathery appearance
3. Vertically growing
4. Horizontally spreading
Code :
A B C D
a) 3 1 4 2
b) 2 1 4 3
c) 2 4 1 3
d) 3 4 1 2

Q.25) Which one of the following is not an exclusive right of the concerned coastal nations over Exclusive Economic Zone [EEZ]?
a) Survey and exploitation of mineral resources of ocean deposits
b) Exploitation of marine water energy and marine organisms including fishing
c) Conservation and management of marine resources
d) Navigation of ships and laying down submarine cables
In the exclusive economic zone, the coastal State has:
(a) sovereign rights for the purpose of exploring and exploiting, conserving and managing the natural resources, whether living or non-living, of the waters superjacent to the seabed and of the seabed and its subsoil, and with regard to other activities for the economic exploitation and exploration of the zone, such as the production of energy from the water, currents and winds;
(b) jurisdiction as provided for in the relevant provisions of this Convention with regard to:
(i) the establishment and use of artificial islands, installations and structures;
(ii) marine scientific research;
(iii) the protection and preservation of the marine environment;
(c) other rights and duties provided for in this Convention.
Q.26) In which one of the following groups of States in India is the Integrated Coastal Zone Management [ICZM] Project being implemented as a pilot investment?
a) Gujarat, Kerala and Goa
b) Kerala , Karnataka and Andhra Pradesh
c) Gujarat, Odisha and West Bengal
d) Maharashtra , Andhra Pradesh and TamilNadu
Q.27) Which of the following statements about the National Water Academy [NWA] is/are correct?
1. The primary objective of the NWA is to function as Centre of Excellence in training for in-service engineers from Central and State organizations on various aspects of water resource planning.
2. The NWA is located in New Delhi
Select the correct answer using the code given below
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2

Q.28) A wire of copper having length l and area of cross section A is taken and a current I is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be
a) P
b) < P
c) > P
d) 2P

Q.29) The pressure of a fluid varies with depth h as P = Po +
a) Pascal’s law
b) Newton’s law
c) Bernouli’s principle
d) Archimede’s principle
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transmit that pressure equally in all directions throughout the fluid. This law is the basic principle that causes hydraulic power in heavy construction machines to work.

Q.30) Consider the following constituent gases of the atmosphere
1. Argon
2. Neon
3. Helium
4. Carbon dioxide
Which one of the following is the correct ascending sequence of the above gases in terms of the volume percentage?
a) 1-3-2-4
b) 1-4-2-3
c) 4-2-3-1
d) 2-4-1-3
The main constituents of the dry atmosphere are nitrogen (78.084% by volume), oxygen (20.946% by volume) and argon (0.934% by volume), but much lower concentrations other noble gases can also be found.


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3 comments:

  1. For question no. 25 regarding Exclusive eCONOMIC zONE, ANSWER IS D AND NOT A.

    ReplyDelete
  2. on contrary to q.no 21 answer should be c (principle of calorimetry).becasure in case of thermal equlibrium there no transfer of heat.

    ReplyDelete

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