This set of Machine Tools Multiple Choice Questions & Answers (MCQs) focuses on “Lathe : Catch Plates and Carriers”.
1. Carriers are also known as lathe dogs.
a) true
b) false
View Answer
Explanation: Lathe dogs term is also used for describing carriers. The carriers consist of a clamping screw.
2. Which of the following is used to drive the work during turning?
a) catch plates
b) carriers
c) both catch plates and carriers
d) none of the mentioned
View Answer
Explanation: Both catch plates and carriers are used to drive the work during turning. A projecting pin from the catch plate or carrier fits into the slot provided in either of them.
3. The work is clamped firmly by a set screw in the lathe_____
a) catch plates
b) carriers
c) both catch plates and carriers
d) none of the mentioned
View Answer
Explanation: The work is clamped in the lathe carriers. It is done by a set of screw. A positive drive between the lathe spindle and workpiece is also imparted.
4. The catch plates are_____
a) screwed
b) bolted
c) either screwed or bolted
d) none of the mentioned
View Answer
Explanation: The catch plated are either screwed or bolted. A projecting pin of a single pin catch plate drives the straight end or tail of a carrier attached to the work piece.
5. The catch plates are bolted to the nose of headstock spindle.
a) true
b) false
View Answer
Explanation: This is false. The catch plates are bolted to the nose of tailstock spindle.
6. The carrier may consists of_____
a) cast iron
b) forged steel body
c) clamping screw
d) all of the mentioned
View Answer
Explanation: The carrier may consist of a cast iron or forged steel body and a clamping screw. To protect the finished surface from damages, a soft metal packing piece is used under this clamping screw.
7. Generally, the carrier is available in a set of 1.
a) true
b) false
View Answer
Explanation: This is false. Generally, The carrier is available in a set of 10.
8. The tails of the carrier is meant to_____
a) locate the work piece
b) drive the work piece
c) both locate the work piece and drive the work piece
d) none of the mentioned
View Answer
Explanation: The tail of the carriers are meant to locate and drive the work piece for turning. Two pins of a double catch plate engage with the double tail or double slotted carrier and provide uniform driver.
9. To protect the finished surface from damages, a hard metal packing piece is used under the clamping screw.
a) true
b) false
View Answer
Explanation: This is false. To protect the finished surface from damages, a soft metal packing piece is used under the clamping screw.
10. Which of the following is the type of catch plate?
a) single pin catch plate
b) double pin catch plate
c) double slotted catch plate
d) all of the mentioned
View Answer
Explanation: All mentioned are the types of catch plates. These are used to drive the work during turning.
11. The bent tail type is used in conjunction with_____
a) a face plate
b) a slotted catch plate
c) a face plate or a slotted catch plate
d) none of the mentioned
View Answer
Explanation: The bent type is used in conjunction with a face plate or a slotted catch plate. A face plate consists of a circular disc bored out and threaded to sit the nose of the lathe spindle.
12. Which of the following is not true?
a) the projecting pin of a single pin catch plate drives the straight end or tail of a carrier attached to the work piece
b) two pins of a double pin catch plate engage with the double tail or double slotted carrier
c) two pins of a double pin catch plate provide non-uniform drive
d) none of the mentioned
View Answer
Explanation: All above mentioned statements are right except the one which says that two pins of a double pin catch plate provide non-uniform drive. Actually, it provide uniform drive.
13. Which of the following is not the type of carrier?
a) straight tail carrier
b) double slotted carrier
c) double tail carrier
d) none of the mentioned
View Answer
Explanation: All above mentioned are the types of carrier. These carriers are capable of accommodating work of wide range of diameters.
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