1) Which one of the following operations is NOT done on a workpiece held in between centres?
Knurling
Undercutting by plunging
Thread cutting
Parting off
2) Which one of the following methods of. catching the threads consumes more time when cutting odd pitch threads?
Using thread-chasing dial
Reversing the machine
Marking the work holding device and lead screw
Pre-determined travel of the carriage
3) A hole is drilled in a lathe by using a 0 10 mm straight shank drill held in a drill chuck. After a short distance of the drill travel, it rotates along with the work. Which one of the following is the cause for this defect?
Chips getting clogged
Centre not aligned
Spotting at the centre not done
Feeding by tailstock hand wheel is too slow
4) The unusual sound is heard during rough boring a large diameter hole. Which one of the following statements ¡s the cause for this defect?
Boring tool springs its travel
Coolant is not applied with force
Toolset below center
No secondary clearance ground on the front cutting edge
Correct answer
Boring tool springs its travel
5) A workpiece is chamfered to remove burrs. It is observed that the chamfer width is not uniform throughout the periphery of chamfer on a workpiece. Which one of the following is the cause for this defect?
The angle of chamfering is not correct
The chamfering tool not set square to the work axis
The work face not running true
The overhang of the tool is too much
6) By which one of the following, a multi-start thread is cut on a lathe?
By a chaser
By a die head
By a single-point tool
By a split die
7) If the lead screw has 6 TPI and there are 4 numbered divisions in the chasing dial, which one of the following will be the teeth worm wheel of chasing dial?
48 teeth
24 teeth
18 teeth
12 teeth
8) While thread cutting on a lathe by using the single-point tool, the tool moves in a path called as
Epicycloid
Cycloid
Rake
Helix
9) Which one of the following diameters of the workpiece should be turned before cutting external threads?
Major diameter
Core diameter
Pitch diameter
Head diameter
10) When the threading tool reaches the end of the thread, the tool should be
left in the groove and reverse the workpiece
withdrawn after stopping the machine
withdrawn while the tool is taking the cut
withdrawn after removing the workpiece
11) A M30 thread is a rough cut using a thread roughing tool. Which one of the following is the correct procedure for aligning the finishing tool with the thread groove?
Work stationery, tool adjusted and positioned in the groove by the compound slide and cross slide
Work stationery, tool adjusted and positioned in the groove by a carriage hand wheel and cross slide handwheel
Work revolving, half nut engaged, tool positioned in the groove by the compound slide and cross slide
Work revolving, half nut engaged, tool positioned in the groove by carriage and cross slide handwheels
12) Which one of the following is a remedial measure to prevent the tool cuffing edge chipping off?
Increase feed rate
Reduce cutting speed
Decrease nose radius
Use the negative top rake
13) In lathe work, when the tool is fed parallel to the rotation of job work, it will produce .....................
Cylindrical surface
Spherical surface
Tapered surface
All of the above
14) The following part of Lathe serves as the housing for the driving pulleys and back gears
Headstock
Bed
Carriage
Tailstock
15) The Lathe carriage serves the following purpose of the tool
Guiding
Feeding
Supporting
All of the above
16) The following is used in Magnetic Chucks
Electromagnet
Permanent magnet
Both ‘A’ and ‘B’
None of the above
17) The following is used for holding bored parts for machining their outside surfaces on Lathe.
Mandrel
Angle plate
Driving plate
Dogs
18) The following is used to support too flexible job very close to the cutting edge.
Steady rest
Follower Rest
Compound rest
All of the above
19) The following is the taper turning method on the lathe
Tailstock set-over method
By swiveling the compound rest
Using a broad nose tool
All of the above
20) In the lathe, form tools are used to produce
Cylindrical surfaces
Tapered surfaces
The surfaces which are neither cylindrical nor tapered
Threads
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