(A) 20 Hz -20 KHz
(B) 100-500 Hz
(C) 10-12 KHz
(D) 13-16 KHz
2. Which one of the following units is used to measure
intensity of noise?
(A) decibel
(B) Hz
(C) Phon
(D) Watts/m2
3. If the population growth follows a logistic curve, the
maximum sustainable yield:
(A) is equal to half the carrying capacity.
(B) is equal to the carrying capacity.
(C) depends on growth rates.
4. Chemical weathering of rocks is largely dependent upon:
(A) high temperature
(B) strong wind action
(C) heavy rainfall
(D) glaciation
5. Structure of earth's system consists of the following:
Match List-I with List-II and give the correct answer.
List-I
(Zone) List-II (Chemical Character)
(a)
Atmosphere (i) Inert gases
(b)
Biosphere (ii) Salt, fresh water, snow and ice
(c)
Hydrosphere (iii) Organic substances, skeleton
matter
(d)
Lithosphere (iv) Light silicates
Codes:
(a) (b) (c) (d)
(A) (ii) (iii) (i) (iv)
(B) (i) (iii) (ii) (iv)
(c) (ii) (i) (iii) (iv)
(D) (iii) (i) (ii) (iv)
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