Engineering - Civil Enginnering

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49.

If a composite bar of steel and copper is heated, then the copper bar will be under                        
A. tension B. compression
C. shear D. torsion



50.

If a material has identical properties in all directions, it is said to be                        
A. homogeneous B. isotropic
C. elastic D. orthotropic



51.

If a point in a strained material is subjected to equal normal and tangential stresses, then the angle of obliquity is                        
A. 0° B. 45°
C. tan"1 (1/2) D. tan"1 (2)




52.

If a prismatic member with area of cross-section A is subjected to a tensile load P, then the maximum shear stress and its inclination with the direction of load respectively are                        
A. P/A and 45° B. P/2Aand45°
C. P/2A and 60° D. P/A and 30°



53.

If a three hinged parabolic arch carries a uniformly distributed load over the entire span, then any section of the arch is subjected to                        
A. normal thrust only B. normal thrust and shear force
C. normal thrust and bending moment D. normal thrust, shear force and bending moment



54.

If all the dimensions of a prismatic bar are doubled, then the maximum stress produced in it under its own weight will                        
A. decrease B. remain unchanged
C. increase to two times D. increase to four times



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