Mechanical Engineering Mcqs Practice Test

Question 1

Admiralty gun metal contains__________________?

Accepted Answer

B. 88% copper, 10% tin and rest zinc

Question 2

Free cutting steels_____________________?

Accepted Answer

A. are used where ease in machining is the criterion

Question 3

Permalloy is a___________________?

Accepted Answer

E. nickel and iron alloy having high permeability

Question 4

The alloy used for making electrical resistances and heating elements is____________________?

Accepted Answer

A. nichrome

Question 5

Gun metal contains__________________?

Accepted Answer

C. 85-92% copper and rest tin with little lead and nickel

Question 6

Bronze contains_____________________?

Accepted Answer

B. 90% copper and 10% tin

Question 7

Structural steel contains following principal alloying elements__________________?

Accepted Answer

A. nickel, chromium and manganese

Question 8

Which of the following is used for bearing liner_______________?

Accepted Answer

D. babbit metal

Question 9

If a refractory contains high content of silicon, it means refractory is__________________?

Accepted Answer

C. neutral

Question 10

Corrundum contains more than 95% _____________________?

Accepted Answer

B. A1203

Question 11

Ductile cast iron___________________?

Accepted Answer

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

Question 12

Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio_________________?

Accepted Answer

B. 30 : 70

Question 13

Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio _____________________?

Accepted Answer

A. 50 : 20 : 20 : 10

Question 14

Corrosion resistance of steel is increased by adding__________________?

Accepted Answer

A. chromium and nickel

Question 15

The usual composition of a soldering alloy is__________________?

Accepted Answer

A. tin, lead and small percentage of antimony

Question 16

The crystal structure of brass is_________________?

Accepted Answer

A. F.C.C.

Question 17

A specimen of aluminium metal when observed under microscope shows __________________?

Accepted Answer

B. F.C.C. crystal structure

Question 18

Brass contains___________________?

Accepted Answer

A. 70% copper and 30% zinc

Question 19

Steel made from phosphatic iron is_________________?

Accepted Answer

A. brittle

Question 20

Which one of the following metals would work-harden more quickly than the others__________________?

Accepted Answer

B. brass