Lathe ITI Machinist Objective Questions and Answers - ObjectiveBooks

Lathe ITI Machinist Objective Questions and Answers

Practice Test: Question Set - 11


1. The negative rake angle is generally provided on the tool made of
    (A) High speed steel
    (B) Tool steel
    (C) Tungsten carbide
    (D) High carbon steel

2. Dead center, as compared with the live center, bears or resists
    (A) No friction
    (B) Equal friction
    (C) Less friction
    (D) More friction

3. What effective change will occur to the tool geometry if the cutting tool is set below the centre height on lathe?
    (A) Front clearance angle increases
    (B) Front clearance angle decreases
    (C) Front clearance angle remains the same
    (D) Front clearance angle becomes zero

4. Which one of the following on a lathe is used to give depth of cut?
    (A) Compound slide
    (B) Top slide
    (C) By adjusting the tool
    (D) Cross slide

5. Which one of the following tool posts is easy for setting the tool center height of the tool in a lathe?
    (A) Open side tool post
    (B) Single screw tool post
    (C) Four-way tool post
    (D) Universal tool post

6. Which one of the following is NOT a part of the taper turning attachment?
    (A) Guide block
    (B) Sliding block
    (C) Guide bar
    (D) Carrier

7. When using a yoke type taper turning attachment, the depth of cut is given by
    (A) Cross slide
    (B) Compound slide
    (C) Tailstock
    (D) Adjusting the tool

8. In the parting off tool which angle will help the tool to penetrate into the work without running at the sides?
    (A) Top rake angle
    (B) Front clearance angle
    (C) Side clearance angle
    (D) Back clearance angle

9. A simple gear train is to be used to cut a thread with a certain pitch. A driver gear with 3 teeth more than that of the calculated value mounted due to non-availability of the required gear from the set. The thread that is cut will have the pitch
    (A) More than that required throughout the length
    (B) Less than that required throughout the length
    (C) Equal to that required throughout the length
    (D) More for a certain length and then less for the remaining length

10. Taper turning by using compound slide method can cause the following defect.
    (A) Chatter
    (B) Poor surface finish
    (C) Taper angle more than set
    (D) Taper angle less than set

11. Which one of the following factors will NOT influence the selection of the cutting speed?
    (A) Diameter of the workpiece
    (B) Workpiece material
    (C) Tool material
    (D) Operation to be performed

12. A fixed steady rest is used to
    (A) Support the tool rigidly to avoid chatter during operation
    (B) Support long shafts that are being threaded for their full length
    (C) Support workpiece during facing large diameter workpiece with short length
    (D) Support long workpiece held in chuck, to perform operations at the overhanging end

13. One of the parts of a centre lathe is the tumbler gear unit. It is provided to
    (A) Change the direction of feed
    (B) Transmit motion from feed shaft to the carriage
    (C) Change the direction of rotation of the work
    (D) Alter the spindle speed

14. When the threading tool reaches the end of the thread, the tool should be
    (A) Left in the groove and reverse the workpiece
    (B) Withdrawn after stopping the machine
    (C) Withdrawn while the tool is taking cut
    (D) Withdrawn after removing the workpiece

15. A M30 thread is 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?
    (A) Work stationary, tool adjusted and positioned in the groove by compound slide and cross slide
    (B) Work stationary, tool adjusted and positioned in the groove by carriage hand wheel and cross slide hand wheel
    (C) Work revolving, half nut engaged, tool positioned in the groove by compound slide and cross slide
    (D) Work revolving, half nut engaged, tool positioned in the groove by carriage and cross slide hand wheels

16. The matching scroll threads on the back faces of the chuck jaws of a concentric chuck are
    (A) Equal in numbers but unequal in pitch
    (B) Unequal in numbers but equal in pitch
    (C) Unequal in numbers and unequal in pitch
    (D) Equal in numbers and equal in pitch

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