59.

61.

65.

The application, before casting, of a tensile force to high 10018110 80001 tendons around which
the concrete is to be cast. When the placed conerete has developed sufficient compreszive
strength a compressive force is imparted to it by releasing the tendons, so that the concrete
member is in a permanent state ല്‌ prestress, This method of pre stressing is called :

(A) Pre - tenaioning 18) Post— tenzioning

(0) Castin situ (10) None of the above

Pick up the correct statement given below :

(ಡಿ) Prestressing maximiges the effect of cracks in concrete elements by holding the
concrete in compression

(8) Prestressing increase beam depths to be achieved for equivalent design strengths

(€) Prestressed concrete is resilient and will recover from the effects of a greater
degree of overload than any other structural material

(D) Prestressing does not permit a more efficient usage of steel and does not enable
the economic use of high tensile steels and high strength concrete

In a desert ecosystem the Abiotic components are ;
(A) Plants, Animals, Microbes
(ठ) Precipitation, Temperature Sunlight, വി
(£) Rain, Light, Wind Temperature
(D) None of the above

The mixture of gases enveloping the surface of the earth held by gravitational force and
friction is the :

(ಸ) Troposphere (ए) Stratosphere

(0) Atmosphere (D) Exosphere

The radiation received by the earth or absorbed by the earth each year is balanced by
corresponding heat loss. Without this cooling the thermal balance would not be maintained.
The earth’s surface looses heat by :

(A) By evaporation

(B) By long wave radiation to the outer space
(C) Rising of hot air

(D) All the above

The air movement on the surface of earth due to difference in pressure which is caused due to
change in temperature is called winds. Types of wind flowing over earth’s surface :

(A) Planetary Winds (7) Monsoon Winds

(€) Cyclonic/Anticyclonic Winds (1) All the above

The main factors that influence thermal comfort are those that determine heat gain and loss,
namely :

(ಗಿ) Metabolic Rate (B) Clothing Insulation

(0) Relative Humidity (D) All the above

45/2014 10 A