Mechanical Lathe MCQ Test Series - Set 02 - ObjectiveBooks

Mechanical Lathe MCQ Test Series - Set 02

Practice Test: Question Set - 02

1. Which among the following statements in respect of threads / thread cutting is NOT correct?
    (A) Threading tools are checked for accuracy for the 60 Degree angle by using a centre gauge
    (B) M 10 × 1.25 is a fine pitch thread
    (C) M 10 is a coarse pitch thread
    (D) Same tool is used for cutting external and internal threads

2. The special gear of 127 teeth or 63 teeth may be used to cut metric threads in a lathe having British lead screw. It is known as
    (A) Idler gear
    (B) Change gear
    (C) Translating gear
    (D) Compound gear

3. Which among the following statements in respect of chasers is correct?
    (A) Chaser is a single point cutting tool
    (B) Cutting threads by a chaser is slower process than that by a single point tool
    (C) Cutting threads by chaser gives better finish
    (D) The same chaser can be used for cutting any pitch of thread irrespective of the type of chaser used

4. Which one of the following is the disadvantage of taper turning by compound rest method?
    (A) Only step taper can be turned
    (B) Both internal and external taper can be turned
    (C) Only hand feed is possible
    (D) Easy setting of the compound rest

5. Tool makers' buttons are used for
    (A) Aligning the workpiece for boring to a given datum
    (B) Setting the tool at correct centre height
    (C) Adjusting the slackness in the guideways of cross-slide
    (D) Holding the workpiece firmly

6. Which among the following statements in NOT correct?
    (A) A face plate is similar to the magnetic chuck
    (B) For accurate setting of the job on the face plate, dial test indicator is used
    (C) To check the balance of the face plate work, spindle drive should be disconnected
    (D) 'V' block is essential for holding round job on face plate

7. Which one of the following abbreviations is used to specify an acme thread?
    (A) M 16
    (B) Rd20 × l/8M
    (C) s48 × 8
    (D) Tr60 × 9

8. One of the methods of aligning lathe centers is trial cut method. The diameter at the tailstock end is found to be bigger than the headstock end by 0.1 mm after the trial cut. Before the next trial cut the tailstock body should be moved by
    (A) 0.1 mm towards the operator
    (B) 0.05 mm towards the operator
    (C) 0.1 mm away from the operator
    (D) 0.05 mm away from the operator

9. Which one of the following angles of rough turning tool, depends upon the feed rate chosen?
    (A) Top rake angle
    (B) Side rake angle
    (C) Front clearance angle
    (D) Side clearance angle

10. Which one of the following methods of catching the threads consumes more time when cutting odd pitch threads?
    (A) Using thread-chasing dial
    (B) Reversing the machine
    (C) Marking the work holding device and lead screw
    (D) Pre-determined travel of the carriage

11. A workpiece is chamfered to remove burrs. It is observed that the chamfer width is not uniform throughout the periphery of chamfer on the workpiece. Which one of the following is the cause for this defect?
    (A) The angle of chamfering is not correct
    (B) The chamfering tool not set square to the work axis
    (C) The work face not running true
    (D) The overhang of the tool is too much

12. 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?
    (A) 48 teeth
    (B) 24 teeth
    (C) 18 teeth
    (D) 12 teeth

13. Dovetail chasers are clamped in a
    (A) Lathe tool post
    (B) Tool holder for holding circular form tool
    (C) Special tool holder
    (D) Bit tool holder

14. When rough turning a workpiece with a carbide tool long curly chips are formed. Which one of the following is the right way of getting rid of this kind of chips?
    (A) Stop the power feed at intervals so that the chip breaks
    (B) Change the rake angle
    (C) Provide chip breaker on the tool
    (D) Use a metal hook and pull away the chips

15. The fingers of a fixed steady rest are set to support a lengthy workpiece held in a Four-jaw chuck. The fingers are adjusted and set when the workpiece is
    (A) Trued at the chuck and the work is stationary
    (B) Trued at the tailstock end when the work is running at slow rpm
    (C) Trued at both ends and work is stationary
    (D) Trued at both ends when the work is running at slow rpm

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