A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. What is used to make a small indentation (centre hole) in sheet metal?
A. Center Punch
B. Needle
C. Pencil
D. Scribber
2. Usually the width of hand vice jaw is
A. 95 to 180mm
B. 40 to 45 mm
C. 80 to 140 mm
D. 125 to 150 mm
3. In an acetylene cylinder, the acetylene is dissolved in
A. Water
B. Carbon Dioxide
C. Acetone
D. Mercury
4. The bench vice spindle is made of
A. Mild steel
B. Cast iron
C. Tool steel
D. Bronze
5. Difference between maximum and minimum sizes allowed in manufactured components is called
A. Clearance
B. Allowance
C. Tolerance
D. Limit
6. Value of each main scale division of vernier bevel protractor is
A. 1°
B. 5'
C. 1 ° - 55'
D. 1/2°
7. One which unit the tool setting is done on NC machine?
A. On special devices away from the machine
B. On the NC machine during idle time
C. On the pre setting devices
D. None of above
8. In a gap bed lathe, the gap is provided
A. Just below the nose of the headstock spindle
B. Just below the spindle of the tailstock
C. In the middle of the bed
D. Anywhere in the bed
9. Which among the following statements in respect of chip breakers is correct ?
A. Chip breakers are essential for breaking the long continuous chips into small pieces
B. Chip breakers are necessary to break the chips to protect the finished work surfaces
C. Chip breakers are provided to curl and break the chips
D. All the above
10. Lathe bed is made of
A. Mild steel
B. Cast iron
C. High carbon steel
D. High alloy steel
11. Unusual sound is heard during rough boring a large diameter hole. Which one of the following statements is the cause for this defect ?
A. Boring tool springs its travel
B. Coolant is not applied with force
C. Tool set below centre
D. No secondary clearance ground on the front cutting edge
12. The axis of the plate cam blank and the end mill spindle should always remain?
A. Inclined to each other
B. Parallel to each other
C. Opposite to each other
D. Vertical and inclined
13. Commonly used standard length of hacksaw blade is
A. 100 mm
B. 150 mm
C. 200 mm
D. 250 mm
14. Which of the following method is not used for holding tool?
A. by a sleeve
B. by chucks
C. by a socket
D. None of these
15. Why do you hold a workpiece lengthwise while machining in a planning machine?
A. It is easier to load workpiece lengthwise
B. The idle time will be minimised
C. The surface quality will be improved
D. The tool life will be increased
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.
17. Tumbler gear quadrant is used for
A. Increasing the speed of the spindle
B. Decreasing the speed of the spindle
C. Changing the direction of rotation of the lead screw
D. Changing the direction of the spindle
18. By which unit the roughness value is expressed for grinding
A. ?
B. ?n
C. ?bs
D. ?t
19. Chief alloying elements of stainless steel are
A. Chromium and nickel
B. Chromium and tungsten
C. Nickel and vanadium
D. Nickel and tungsten
20. Which one of the following alloys can resist salt water corrosion
A. Brass
B. Gun metal
C. Zinc alloy
D. Nickel chrome alloy
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