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7.

A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will                        
A. increase B. decrease
C. remain same D. increase/decrease depending on depth of immersion



8.

A fluid in equilibrium can't sustain                        
A. tensile stress B. compressive stress
C. shear stress D. bending stress



9.

A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is                        
A. 400 kg/cm2 B. 4000 kg/cm2
C. 40 x 105 kg/cm2 D. 40 x 106 kg/cm2




10.

A liquid would wet the solid, if adhesion forces as compared to cohesion forces are                        
A. less B. more
C. equal D. less at low temperature and more at high temperature



11.

A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?                        
A. the metal piece will simply float over the mercury B. the metal piece will be immersed in mercury by half
C. whole of the metal piece will be im-mersed with its top surface just at mer-cury level D. metal piece will sink to the bottom



12.

A pressure of 25 m of head of water is equal to                        
A. 25 kN/m2 B. 245 kN/m2
C. 2500 kN/m2 D. 2.5kN/m2



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