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3-Which of the following is second hardest substance known?

(A) Ceramics (B) Cermets (C) Cubic Boron Nitride (CBN) (D) Diamond (Ans: C) 4-Which of the following tools are generally manufactured by Powder metallurgy?

(A) Low carbon steel (B) Abrasives (C) High carbon steel (D) Cemented carbides (Ans: D) 5-Which of the following is hardest known material?

(A) Cemented carbide (B) Ceramics (C) Cubic boron nitride (CBN) (D) Diamond (Ans: D) 7-The cutting tool wears due to

(A) Edge wear (B) Crater wear (C) Flank wear (D) All of the above (Ans: D) 8-The built up edge in cutting tools can be eliminated by

(A) Fast cutting speed (B) Higher rake angles (C) High pressure cutting fluid (D) All of the above (Ans: D) 9-The cutting speed of High speed steels is ___ times faster than Carbon steel

(A) 2 (B) 4 (C) 6 (D) 8 (Ans: B) 10-Which of the following cutting tool has highest hot hardness?

(A) Ceramics (B) Cast alloys (C) High speed steels (D) Carbon tool steel (Ans: A) 8. Thermal conductivity of cutting tool must be a) High b) Low c) Very low d) None of the mentioned

Answer: a 6-Corrundum is a/an

(A) Diamond (B) Abrasive (C) Ceramic (D) None of the above

(Ans: B) 5. Tool signature consists of __________ elements.

(A) Two (B) Four (C) Five (D) Seven

Correct Answer Answer: Option D

8-In which of the following single point cutting tool is used

(A) milling (B) lathe (C) drilling (D) broaching Ans- (B) 7-In which of the following multi-point cutting tool is used

(A) milling (B) lathe (C) shaper (D) boring Ans- (A) 10-It is the angle between the face of the tool and a line parallel with base of the tool measured in a perpendicular plane through the side cutting edge. (A) Back rake angle (B) Side rake angle (C) End relief angle (D) Side relief angle Ans- (A) 12-It is the angle that allows the tool to cut without rubbing on the work- piece. (A) Back rake angle (B) Side rake angle (C) End relief angle (D) Side relief angle Ans- (C) 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)

69. The angle between the face and flank of the single point cutting tool is known as A.

Rake angle

B.

Clearance angle

C.

Lip angle

D.

Point angle

Answer: Option C

Stellite preserves hardness up to a temperature of A. 350°C B. 500°C C. 900°C D. 1100°C Stellite preserves hardness up to a temperature of 1100°C

High speed steel tools retain their hardness up to a temperature of A. 250°C B. 350°C C. 500°C D. 900°C Ans - 900°C Small nose radius A. Increases tool life B. Decreases tool life C. Produces chipping and decreases tool life D. Results in excessive stress concentration and greater heat generation Answer: Option D...