Kerala PSC Assistant Director Fisheries Paper 2015

Kerala Public Service Commission Assistant Director Fisheries Paper 2015

Deepest parts of the oceans are called
(a) Mid ocean ridges
(b) Seamount
(c) Trench
(d) Continental shelf

The most abundant component of sea water is
(a) Chlorine
(b) Sulphate
(c) Sodium
(d) Potassium

The average speed of sound in the ocean is
(a) 200 m/s
(b) 800 m/s
(c) 1500 m/s
(d) 2500 m/s

The layer where ocean temperature decereases rapidly with depth is called
(a) Halocline
(b) Pycnocline
(c) Thermocline
(d) SOFAR channel

On the average, sea surface salinity is
(a) Maximum at the equator
(b) Maximum around 30 degrees latitude
(c) Maximum at Poles
(d) None of the above

Heat lost by sea due to evaporation is called
(a) Shortwave radiation
(b) Longwave radiation
(c) Latent heat
(d) Sensible heat

If the time taken by a sound pulse to travel from the sound source at sea surface to the ocean floor and back is 3 seconds, then the approximate ocean depth is
(a) 2250 meter
(b) 4500 meter
(c) 9000 meter
(d) 9500 meter

Coriolis force at the equator is
(a) maximum
(b) zero
(c) Varies with longitude
(d) varies with depth

Wind stress is proportional to
(a) wind speed
(b) Square of wind speed
(c) cube of wind speed
(d) Square root of wind speed

In the ocean, light intensity
(a) Increases linearly with depth
(b) Decreases linearly with depth
(c) Increases exponentially with depth
(d) Decreases exponentially with depth