A. greater than 7
B. less than 7
C. equal to 7
D. pH value has nothing to do with neutral solution
E. none of the above
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
A. improvement of casting characteristics
B. improvement of corrosion resistance
C. one of the best known age and precipitation-hardening systems
D. improving machinability
E. none of the above
A. 70% copper and 30% zinc
B. 90% copper and 10% tin
C. 85-92% copper and rest tin with little lead and nickel
D. 70-75% copper and rest tin
E. 70% copper and 30% tin
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
A. creep
B. fatigue
C. endurance
D. plastic deformation
E. non-plastic deformation
A. improves wear resistance, cutting ability and toughness
B. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
C. improves cutting ability and reduces hardenability
D. gives ductility, toughness, tensile strength and anticorrosion properties
E. raises its melting point