- (A) sulphur, lead, phosphorous
- (B) silicon, aluminium, titanium
- (C) vanadium, aluminium
- (D) chromium, nickel
- (E) lubricants
Mechanical Engineering Mcqs
- (A) nickel
- (B) chromium
- (C) tungsten
- (D) vanadium
- (E) ell of the above
- (A) flywheel of steam engine
- (B) cast iron pipes”
- (C) cycle chains
- (D) gas turbine blades
- (E) piston I.
- (A) 0.025%
- (B) 0.26%
- (C) 0.8%
- (D) 1.25%
- (E) 1.7%.
- (A) amount of carbon it contains
- (B) the shape and distribution of the car-bides in iron
- (C) method of fabrication
- (D) contents of alloying elements
- (E) the quality of ore from which it is made
- (A) cobalt
- (B) nickel
- (C) vanadium
- (D) iron
- (E) carbon
- (A) improve machinability
- (B) improve ductility
- (C) improve toughness
- (D) release stresses
- (E) reduce hardness and brittleness
- (A) promotes decarburisation
- (B) provides high hot hardness
- (C) forms very hard carbides and thus in-creases wear resistance
- (D) promotes retention of austenite
- (E) increases toughness
- (A) RC 65
- (B) RC 48
- (C) RC 57
- (D) RC 80
- (E) RC 32
- (A) relieve stresses
- (B) harden steel slightly
- (C) improve machining characteristic
- (D) soften material
- (E) permit further cold working
