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. Which one of the following is the resistance of a metal to elastic deformation ?
A. Ductility
B. Strength
C. Stiffness
D. Toughness
2. A dimension is stated as ? 25 H7 in a drawing. The lower limit is :
A. 24.75 mm
B. 24.85 mm
C. 25.00 mm
D. 25.021 mm
3. The main product of puddling furnace is
A. Cast iron
B. Wrought iron
C. Cold rolled steel
D. Hot rolled steel
4. Least count of vernier bevel protractor is
A. 1'
B. 5'
C. 10'
D. 25'
5. This type of fit is high quality and is used for the bulk of interchangeable screw thread work:
A. Class 1
B. Class 2
C. Class 3
D. Class 4
6. Which among the following is a term used in forging in which the thickness of the job is increased by decreasing its length ?
A. Drawing out
B. Punching
C. Drifting
D. Jumping
7. If a worker has suffered from electric shock, he should be
A. given an alcoholic drink
B. given a cold drink
C. made to walk
D. kept warm and covered
8. Threads are cut on a lathe with a single point tool by
A. Setting the correct speed
B. Setting on cut for the full depth of the thread.
C. Making a series of cuts in the same cut.
D. Moving the carriage by means of rack.
9. A tumbler gear unit consists of
A. One gear
B. Two gears
C. Three gears
D. Four gears
10. Which one of the following centres is suitable while cutting taper by set over method?
A. Plain centre
B. Half centre
C. Ball centre
D. Revolving centre
11. You have to cut an aluminium block to smooth finish. Which one of the following cut of file is most suitable ?
A. Single cut
B. Double cut
C. Rasp cut
D. Circular cut
12. Crane hooks are made of
A. Wrought iron
B. High carbon steel
C. Cast steel
D. Cast iron
13. An irregularly shaped workpiece is turned on a lathe. which one of the following work holding accessories is used?
A. Three jaw chuck
B. Two jaw chuck
C. Driving plate
D. Face plate
14. As compoared with Copper conductivity of Aluminium is about :
A. 39$
B. 49%
C. 59%
D. 69%
15. Which of the following reamers is particularly suitable for reaming holes having key way grooves ?
A. Straight fluted reamer
B. Helical fluted reamer
C. Taper reamer
D. Pilot reamer
16. One centimeter is equivalent to
A. 100 mm
B. 10 mm
C. 1 mm
D. 0.1 mm
17. Which of the following cannot take radial load?
A. Cylindrical Roller bearing
B. Taper roller bearing
C. Thrust ball bearing
D. None of these
18. Generally, bearing bushes are made of
A. Copper
B. Brass
C. White metal
D. Gun metal
19. Which among the following is the cause for incorrect pitch of thread during thread cutting with single point tool?
A. Incorrect selection of change gears
B. Lead screw worn out
C. Half nut worn out
D. Any one of the above
20. After threading a hole by a tap, it was found that the crest of thread was not formed through out. Which one of the following reasons would have caused this defect ?
A. Insufficient coolant supply
B. Broken the tip of cutting edge of the tap
C. Hole size slightly less than the tap drill size
D. Hole size slightly more than the tap drill size
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