NDA/NA SOLVED PAPER 2015-I (GENERAL KNOWLEDGE)

Total Questions: 100

51. Which endocrine gland requires iodine to synthesize a particular hormone whose deficiency may cause goitre disease?

Correct Answer: (d) Thyroid gland
Solution:Thyroid gland requires iodine to produce its hormone.

52. Which one of the following is not a part of nerves?

Correct Answer: (d) Smooth muscles
Solution:A nerve is an enclosed, cable-like bundle of axons (the long, slender projections of neurons) in the peripheral nervous system. Neurons are sometimes called nerve cells, though this term is potentially misleading since many neurons do not form nerves, and nerves also include non-neuronal Schwann cells that coat the axons in myelin. Finally, the entire nerve is wrapped in a layer of connective tissue called the epineurium.

53. The product of counductivity and resistivity of a conductor

Correct Answer: (c) is the same for all conductors
Solution:Conductivity (o) is the reciprocal of resistivity. i.e., σ = 1/ρ

54. We use CFL to save electrical energy and to provide surfficient light. The full form of CFL is

Correct Answer: (d) Compact fluorescent lamp
Solution:Compact Fluorescent Lamp is the energy saving lamp, designed to reduce the electric power consumption.

55. When the sun is 30° above the horizon, shadow of one tree is 17.3 m long. What is the height of this tree?

Correct Answer: (c) 10m
Solution:


56. When heat rays are reflected from Earth, gases like Carbon dioxide, Nitrous oxide do not allow them to escape back to the space causing our planet to heat up. These gases are known as

Correct Answer: (b) Green-house gas
Solution:A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

57. A spring can be used to determine the mass m of an object in two ways: (i) by measuring the extension in the spring due to the object; and (ii) by measuring the oscillation period for the given mass. Which of these methods can be used in a space-station orbiting Earth ?

Correct Answer: (c) Only the oscillation method

58. Match List I with List II and select the correct answer using the code given below the Lists:

List-I (Region)List-II (Vegetation)
A. Selvas1. Conifers
B. Savannas2. Mosses and Lichens
C. Taiga3. Epiphytes
D. Tundra4. Grasses and trees
Code:ABCD
(a)4123
(b)3214
(c)3212
(d)4213
Correct Answer: (c)
Solution:Selva is dense equatorial forest, in the Amazon basin, characterized by tall broad-leaved evergreen trees, epiphytes, lianas, etc Taiga also known as boreal forest or snowforest, is a biome characterized by coniferous forests consisting mostly of pines, spruces and larches. In Tundra, the vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens. A Savannah or Savannah is a grassland ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close.

59. Which of the following statements with regard to the western coastal plain of India are correct?

1. It is a narrow belt.
2. It is an example of submerged coastal plain.
3. It provides natural conditions for development of ports.
4. It has well developed deltas.

Select the correct answer using the code given below :

Correct Answer: (a) 1, 2 and 3 only
Solution:Only 1 and 2 are correct.

60. Which one of the following weather conditions indicates a sudden fall in barometer reading?

Correct Answer: (a) Stormy weather
Solution:A rapid fall of barometer reading means stormy conditions.