Multiple Choice Questions (MCQ) with Answers on Mechanical Engineering
81-The iron abstract through puddling furnace is
(A) Pig iron
(B) Cast iron
(C) Gray cast iron
(D) Wrought iron
82-The magnetic property of an iron loses when it is heated to a temperature of
(A) 200°C
(B) 280°C
(C) 520°C
(D) 770°C
83-The process of heating the steel above the upper critical temperature and then allow to cool in air
(A) Hardening
(B) Nitriding
(C) Normalising
(D) Carburising
84-Steam condenser tubes are made of
(A) Alnico
(B) Admiralty brass
(C) Bell metal
(D) Duralumin
85-Drawing of a machine part it is seen that the plan is below the elevation and left side view is in right side of the elevation, so this is a projection at
(A) First Quadrant
(B) Second Quadrant
(C) Third Quadrant
(D) Fourth Quadrant
86-The basic material used for ceramic tool is
(A) Aluminium oxide
(B) Bell metal
(C) Duralumin
(D) Cobalt
87-Tempering process is done in steel to
(A) Increase hardening
(B) Improve toughness and Ductility
(C) Relative internal stress
(D) Improve machinability
88-The solid solution of carbon in gama-iron
(A) Ferrite
(B) Magnetite
(C) Austenite
(D) Haematite
89-The alloying metal used in stainless steel is
(A) Tungsten and molybdenum
(B) Silicon and manganese
(C) Tin and cobalt
(D) Nickel and chromium
90-The property of metal which allows it to deform fracture is
(A) Toughness
(B) Elasticity
(C) Plasticity
(D) Brittleness
ANSWERS:
81-(D), 82-(D), 83-(C), 84-(B), 85-(A), 86-(A), 87-(B), 88-(C), 89-(D), 90-(A)