A. 10-20 dB
B. 40-60 dB
C. 90-12 dB
D. 120-150 dB
Related Mcqs:
- Plants adapted to low light intensity have:
A. Higher rate of CO2 fixation than the sun plants
B. More extended root system
C. Leaves modified to spines
D. Larger photosynthetic unit size than the sun plants - Sometimes sound and uninjured seeds may fail to germinate due to reduced activity of the seed or seed parts resulting in blockade of the growth. This may be due to:
A. External effects of environment
B. Internal conditions within the plant itself, i.e. Embryo dormancy or seed coat dormancy
C. Both (a) & (b)
D. None of these - To provide a sound planning base for the forestry, wildlife, watershed and rangeland sub-sectors, there will be undertaken:
A. Periodic physical/mapping surveys
B. Implementation of a programme for the improvement of statistics relating to forests and wildlife which includes a remote sensing laboratory and Geographical Information System (GIS)
C. Both (a) & (b)
D. None of these - Normal Forest depicts:
A. A specific composition and structure or form of the forest, which is in harmony with the environment or the locality factors
B. Growing stock of the trees should be suitably of desired products
C. Both (a) & (b)
D. None of these - In practice forests are not normal. They are ‘abnormal’ in ways:
A. They are overstocked. This is found in forests where there is more area of forest under the older age classes
B. They are under stocked. This is due to larger proportion of area under immature crops
C. Both (a) & (b)
D. None of these - Preventive measures from part of the normal routine of forest administration, while remedial measures are called for in cases of:
A. Occasional
B. Unexpected damage
C. Where the preventive measures has broken down
D. All of the above - It occurs under normal conditions:
A. Geological erosion
B. Surface creep
C. Both (a) & (b)
D. Accelerated erosion - What are the essential components of normal forest?
A. It is an ideal against which an actual forest may be compared
B. Normal increment “the increment laid on by a normal forest”
C. Normal age class distribution “A complete series of age classes in such proportions as will permit equally yields by volume from annual or periodic felling under given rotation and silvicultural system
D. All of the above - Normal forest means:
A. That forest which has reaches and maintains a practically attainable degree of perfection in all its parts for the full and continued satisfaction of objects of management
B. The provide sustained yield the growing stock must first be moulded to approach a model
C. Both (a) & (b)
D. None of these - Diseases disrupt the normal physiological function of _________.
A. An animal, sometime leading to their death
B. Also having a potential of being transmitted to humans
C. Livestock, between species, and vice versa
D. All of the above
The correct answer to the question: "What is the intensity of sound in normal conversation?" is "40-60 dB".