Workshop Technology problems
- 1. A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?
Options- A. The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction.
- B. The upper and bottom rolls rotate in the same direction whereas the middle roll rotate in opposite direction.
- C. The bottom and middle roll rotate in the same direction.
- D. any one of the above Discuss
Correct Answer: The upper and bottom rolls rotate in the same direction whereas the middle roll rotate in opposite direction.
- 2. In fore-hand welding, the weld is made
Options- A. from left to right
- B. from right to left
- C. first from left to right and then from right to left
- D. either from left to right or from right to left Discuss
Correct Answer: from right to left
- 3. Rotary swaging
Options- A. is extensively used for making bolts and rivets
- B. is used for reducing the diameters of round bars and tubes by rotating dies which open and close rapidly on the work
- C. is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
- D. consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part Discuss
Correct Answer: is used for reducing the diameters of round bars and tubes by rotating dies which open and close rapidly on the work
- 4. The process extensively used for making bolts and nuts is
Options- A. hot piercing
- B. extrusion
- C. cold peening
- D. cold heading Discuss
Correct Answer: cold heading
- 5. To prevent the body of the blade from jamming in the saw cut, the teeth of blade are
Options- A. strengthened
- B. sharpened
- C. set
- D. all of these Discuss
Correct Answer: set
- 6. In fore-hand welding, the angle between the welding rod and the work is kept as
Options- A. 30°-40°
- B. 40°-50°
- C. 50°-60°
- D. 60°-70° Discuss
Correct Answer: 30°-40°
- 7. A casting defect which results in general enlargement of a casting is known as
Options- A. shift
- B. sand wash
- C. swell
- D. scab Discuss
Correct Answer: swell
- 8. According to Indian standards, the total number of tolerance grades are
Options- A. 8
- B. 12
- C. 18
- D. 20 Discuss
Correct Answer: 18
- 9. The electron beam welding can be carried out in
Options- A. open air
- B. a shielded gas environment
- C. vacuum
- D. a pressurised inert gas chamber Discuss
Correct Answer: vacuum
- 10. The binder commonly used in making oil sand, is
Options- A. clay-type binder
- B. organic-type binder
- C. inorganic-type binder
- D. any one of these Discuss
Correct Answer: organic-type binder
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