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Engineering :: Metallurgy

1.  In Brinell hardness tester the load for aluminium is
A. 300 kg B. 1500 kg
C. 1000 kg D. 500 kg
E. 100 kg    
2.  In Brinell hardness testing the timer for loading is
A. 1 second B. 2 seconds
C. 5 seconds D. 15 seconds
E. 1 minute    
3.  In Brinell hardness testing the minimum thickness of the specimen should be
A. Less than 5 times the depth of impression B. Less than 10 times the depth of impression
C. Equal to 10 times the depth of impression D. More than 10 times the depth of impression
E. Thickness of specimen has no relevance to the depth of impression    
4.  Endentor used in Vickers hardness testing machine is
A. 25 mm dia ball B. 15 mm dia ball
C. 10 mm dia ball D. Conical indentor with 120? apex angle
E. Diamond square-based pyramid    
5.  Angularity of the square base pyramid in Vickers hardness tester is
A. 90? B. 11?
C. 120? D. 136?
E. 150?    
6.  The property which enables metals to be drawn into wire is known as
A. Malleability B. Ductility
C. Straining D. Plastic deformation
E. Elastic deformation    
7.  Slow plastic deformation of metals under a constant stress is known as
A. Fatigue B. Proof deformation
C. Gradual deformation D. Creep
E. Endurance failure    
8.  In which of the following cases creep is an important consideration?
A. Cast iron water pipes B. Cycle chains
C. Gas turbine blades D. Steam engine flywheel
E. All of the above    
9.  The rollers of a cycle chain are subjected to
A. Compressive stress B. Tensile stress
C. Shear stress D. Fatigue stress
E. Creep stress    
10.  Which of the following is a non-destructive test?
A. Charpy test B. Izod Impact test
C. Tensile test D. Cupping test
E. X-ray test    

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