Mechanical Engineering MCQs

A. Brass
B. Mild steel
C. Cast iron
D. Wrought iron

A. 0.05%
B. 0.15%
C. 0.3%
D. 0.5%

A. Contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
B. Is also known as chilled cast iron am is obtained by cooling rapidly. it i: almost unmachinable
C. Is produced by annealing process. i is soft, tough and easily machinec metal
D. Is produced by small additions o magnesium (or cerium) in the ladle graphite is in nodular or spheroida form and is well dispersed throughout the material

A. It easily machinable
B. It brittle
C. It hard
D. The casting unsound

A. Improves wear resistance, cutting ability and toughness
B. Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant proper¬ties
C. Improves cutting ability and reduces hardenability
D. Gives ductility, toughness, tensile strength and anticorrosion properties

A. 3- 5
B. 5-7
C. 7-10
D. 10-15

A. Cast iron
B. Pig iron
C. Wrought iron
D. Malleable iron

A. Manganese
B. Magnesium
C. Nickel
D. Silicon

A. Cold rolled steel
B. Hot rolled steel
C. Forged steel
D. Cast steel

A. Contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
B. Is also known as chilled cast iron and is obtained by cooling rapidly. it is almost unmachinable
C. Is produced by annealing process. it is soft, tough and easily machined metal
D. Is produced by small additions of magnesium (or creium) in the ladle. graphite is in nodular or spheroidal form and is well dispersed throughout the material