Machine Tools Multiple Choice Questions on “Forging”.
1. In forging process, metals are shaped by _____
a) impact
b) cohesion
c) tense
d) none of the mentioned
Answer: a
Clarification: Forging is a manufacturing process which shapes the metal with the help of localized compressive force. It shapes metal with impact force.
2. Which method is considered as one of the oldest methods of giving required shapes to the metals ?
a) casting
b) forging
c) forming
d) none of the mentioned
Answer: b
Clarification: Experts considered forging as the oldest method of giving required shapes. For a long time, this forging was used by the smith with hammer. After that, this method was cam into picture in industries.
3. Smithy forging can also be termed as open die forging.
a) true
b) false
Answer: a
Clarification: This is true. It gives greater strength and also chances of voids are reduced in this type of forging.
4. Which of the following is the example of impact pressure forging ?
a) striking a blow
b) shaping by press
c) all of the mentioned
d) none of the mentioned
Answer: a
Clarification: Striking a blow is an example of impact pressure and shaping by press is an example of squeeze pressure forging.
5. Cold forging is also known as simply forging.
a) true
b) false
Answer: b
Clarification: This is false. Hot forging is known as simply forging.
6. Which type of forging is done by deforming the metal at room temperature?
a) cold forging
b) simply forging
c) hot forging
d) all of the mentioned
Answer: a
Clarification: Cold forging is done by deforming the metal at room temperature. This is done by increasing the level of stress above the elastic limit.
7. Hot forging is also known as simply forging.
a) true
b) false
Answer: a
Clarification: Hot forging is also known as simply forging and metal is heated to the temperature(up to plastic temperature) in this process.
8. The upset type of forging makes increment in the diameter of the workpiece.
a) true
b) false
Answer: a
Clarification: This forging makes increment in the diameter of the workpiece by compressing its length. Engine parts, coupling, bolts etc. are produced with the help of upset forging.
9. Which type of forging is done by blacksmith?
a) hand forging
b) machine forging
c) both hand forging and machine forging
d) none of the mentioned
Answer: a
Clarification: Hand forging is done in the smithy shop. This hand forging is done with the help of hand tools or steam hammer.
10. For which purpose, hand forging is used?
a) maintenance work
b) production of small articles tools
c) repair work
d) all of the mentioned
Answer: d
Clarification: Hand forging has the limited application in above regions because accuracy of hand forging depends mainly upon the blacksmith.
11. In which forging process, parts are heated in open hearth?
a) machine forging
b) hand forging
c) both hand forging and machine forging
d) none of the mentioned
Answer: b
Clarification: In hand forging, parts are heated in open hearth because it is done in smithy job manually. Shaping is carried out with hand tools.
12. In which forging process, parts are heated in closed hearth?
a) machine forging
b) hand forging
c) hand forging and machine forging both
d) none of the mentioned
Answer: a
Clarification: Heavy forgings are produced by presses and light forgings by hammer. In this, the squeezing action is carried entirely on the centre of the part.So, closed hearth is more preferable.
13. Press forgings are churlish in surface.
a) true
b) false
Answer: b
Clarification: Press forgings are smooth in surface to provide a closed tolerance in case of machine forging.
14. Roll forging is done with the help of______
a) cylindrical rolls
b) semi-cylindrical roll
c) both cylindrical and semi cylindrical rolls
d) none of the mentioned
Answer: c
Clarification: Roll forging is done with the help of both cylindrical and semi cylindrical rolls. These both rolls contains one or more shaped grooves.
15. Cast iron is forgeable.
a) true
b) false
Answer: b
Clarification: This is false. Brittle metal cannot be forged.