Objective Questions and Answers on Manufacturing processes
23-In Electro- Discharge Machining (EDM), the tool is made of
(A) Copper
(B) High speed steel
(C) Cast iron
(D) Plain carbon steel
(Ans: A)
24-Which of the following is a single point cutting tool?
(A) Hacksaw blade
(B) Milling cutter
(C) Grinding wheel
(D) Parting tool
(Ans: D)
25-In ASA System, if the tool signature is 8-6-5-5-10-15-2-mm, then the side rake angle will be
(A) 5°
(B) 6°
(C) 8°
(D) 10°
(Ans: B)
26-Cold working of metal increases
(A) tensile strength
(B) hardness
(C) yield strength
(D) all of the above
(Ans: D)
27-Seamless tube can be produced by
(A) two high rolling mill
(B) ring rolling combined with stretch forming
(C) piercing
(D) steam hammering forging
(Ans: C)
28-In electro chemical machining (ECM) the material removal is due to
(A) corrosion
(B) erosion
(C) fusion
(D) ion displacement
(Ans: D)
29-Crater wear occurs mainly due to
(A) abrasion
(B) diffusion
(C) oxidation
(D) adhesion
(Ans: B)
30-Tool life of the cutting tool is most affected by
(A) Cutting speed
(B) Tool geometry
(C) Cutting feed and depth
(D) Microstructure of material being cut
(Ans: A)
31-Metal in machining operation is removed by
(A) Tearing chips
(B) Shearing the metal across a zone
(C) Distortion of metal
(D) Cutting the metal across a zone
(Ans: B)
32-Usual casting method for making dental crowns
(A) Sand casting
(B) Die casting
(C) Continuous casting
(D) Investment casting
(Ans: D)
33-The mechanism of material removal in EDM process is
(A) Melting and Evaporation
(B) Melting and Corrosion
(C) Erosion and Cavitation
(D) Cavitation and Evaporation
(Ans: A)
34-If the metals are ductile and the cutting speed is high, then
(A) Continuous chips are formed
(B) Discontinuous chips are formed
(C) Continuous chips with built-up edges are formed
(D) None of these
(Ans: A)