Mechanical Engineering Questions And Answers :: Engineering Materials: part6



Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part6 : 11 to 15

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

11.Bell metal contains

70% copper and 30% zinc
90% copper and 10% tin
85-92% copper and rest tin with little lead and nickel
70-75% copper and rest tin
70-75% copper and rest zinc and tin.

12.Brass contains

70% copper and 30% zinc
90% copper and 10% tin
85-92% copper and rest tin with little lead and nickel
70-75% copper and rest tin
70% copper and 30% tin.

13.Preheating is essential in welding

cast iron
high speed steel
all non-ferrous materials
all of the above
none of the above.

14.Corrosion resistance of steel is increased by adding

chromium and nickel
nickel and molybdenum
aluminium and zinc
tungsten and sulphur
none of the above.

15.Which one of the following metals would work-harden more quickly than the others?

copper
brass
lead
silver
aluminium.

More Engineering Materials QUESTIONS AND ANSWERS available in next pages

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