Multiple Choice Questions (MCQ) with Answers on Mechanical Engineering
91-The electrodes of resistance welding machine is made of
(A) Copper beryllium alloy
(B) Lead tin alloy
(C) Copper uranium alloy
(D) Copper silicon alloy
92-The actual size of the pictorial view is for shortening upto 82% in the case of
(A) Oblique projection
(B) Isometric projection
(C) Caralier projection
(D) Orthographic projection
93-The melting point of pure iron is
(A) 1100°C
(B) 980°C
(C) 1535°C
(D) 860°C
94-For what purpose carburising is done in weld?
(A) Hardening the outer surface
(B) Softening the metal
(C) To refine the grains
(D) Hardening the core of steel
95-The most economical mild steel section is
(A) Circular section
(B) Channel section
(C) I-section
(D) Rectangular section
96-The angle of a Prick punch is
(A) 40°
(B) 90°
(C) 75°
(D) 180°
97-Find ferrous metal from the following
(A) Gun metal
(B) Gray cast iron
(C) Phosphor bronze
(D) Brass
98-Internal resistance against the applied load is known as
(A) Power
(B) Strain
(C) Load
(D) Stress
99-The composition of gun metal is
(A) 90% copper and 10% silver
(B) 90% copper and 10% zinc
(C) 10% copper and 90% zinc
(D) 80% copper and 20% tin
100-The melting point of zinc is
(A) 680°C
(B) 950°C
(C) 419°C
(D) 360°C
ANSWERS:
91-(A), 92-(B), 93-(C), 94-(A), 95-(C), 96-(A), 97-(B), 98-(D), 99-(B), 100-(C)