TURNER FITTER MACHINIST IMPORTANT MCQ FOR CBT

21. A right hand tool on a lathe cuts most efficiently when it travels
A. from left to right end of the lathe bed
B. from right to left end of the lathe bed
C. with the help of a compound slide
D. across the bed

22. The surface finish is improved by the increase in
A. cutting speed
B. nose radius
C. true rake angle
D. all of these

23. The cutting speed for drilling copper with high speed steel drills varies from
A. 10 to 20 m/min
B. 18 to 30 m/min
C. 24 to 45 m/min
D. 60 to 90 m/min

24. A dense structure of a grinding wheel is denoted by the number 9 to 15 or higher.
A. Yes
B. No

25. High speed steel tools retain their hardness upto a temperature of
A. 250°C
B. 350°C
C. 500°C
D. 900°C

26. A taper tap has
A. its end tapered for about three or four threads
B. its end tapered for about eight or ten threads
C. full threads for the whole of its length
D. none of the above

27. For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of
A. 50°C
B. 100°C
C. 175°C
D. 275°C

28. Which of the following statement is wrong?
A. The diamond is the hardest tool material and can run at cutting speeds about 50 times that of high speed steel tool.
B. The ceramic tools can be used at cutting speeds 40 times that of high speed steel tools.
C. The cemented carbide tools can be used at cutting speeds 10 times that of high speed steel tools.
D. The ceramic tools can withstand temperature upto 600°C only.

29. Climb milling is chosen while machining because
A. the chip thickness increase gradually
B. it enables the cutter to dig in and start the cut
C. the specific power consumption is reduced
D. better surface finish can be obtained

30. The material which on machining produces chips with built up edge is
A. brittle material
B. tough material
C. hard material
D. ductile material

31. In down milling, the thickness of chip is
A. minimum at the beginning of the cut and maximum at the end of the cut
B. maximum at the beginning of the cut and minimum at the end of the cut
C. uniform throughout the cut
D. none of these

32. The chuck used for setting up of heavy and irregular shaped work should be
A. four jaw independent chuck
B. three jaw universal chuck
C. magnetic chuck
D. drill chuck

33. Which of the following operations is carried out at a minimum cutting velocity if the machines are equally rigid and the tool work materials are the same?
A. Turning
B. Grinding
C. Boring
D. Milling

34. Ceramic tools are fixed to tool body by
A. soldering
B. brazing
C. welding
D. clamping

35. The soft grade grinding wheels are denoted by the letters
A. A to H
B. I to P
C. Q to Z
D. A to P

36. The helix angle of a drill is __________ for drilling brass.
A. equal to 30°
B. less than 30°
C. more than 30°

37. In continuous chip cutting, the maximum heat __________ the velocity of cutting.
A. depends upon
B. does not depend upon

38. In a universal milling machine, the table can be swiveled horizontally and can be fed at an angle to the milling machine spindle.
A. True
B. False

39. The size of a shaper is given by
A. stroke length
B. motor power
C. mass of machine
D. rate size

40. The tool life, in case of continuous cutting, is much better than intermittent cutting.
A. Agree
B. Disagree