Question

Stevens screen used as:
A.providing shelter to the beaker.
B.providing shelter to thermometer
C. both a and b
D. none of these

Answer 1

Hint:The roof of the Stevenson Screen is made of 2-layered wood so that the air space provides insulation .Also it helps to prevent the box from the overheating. The Screen is painted by colour white so that reflection of light can take place.

Complete answer:
Providing shelter to beakers: No,stevene screen is not used in providing shelter to the beaker.
Providing shelters to the thermometer: Stevenson screen is also called by another name that is ,instrument shelter. It is a type of screen used to shield the instruments against the precipitation . It allows direct heat radiation from the other outside sources.
It still allows air to circulate here hand freely around them. It forms part of a standard weather station. The screen helps to create the, near possible, uniform environment with relation to outside air.
It is used to shelter numerous types of temperatures and also humidity measuring instruments. The small screen contains a dry bulb thermometer as well as wet bulb thermometer.

Hence, the correct answer is option (B).

Note:Stevenson screens are always painted with white colour,so that it can better reflect the sun's rays falling over it. The lowered sides of the screen allows the outside air to flow around thermometers.