1. A thread has number of starts equal to one. Which of the following is most correct about thread?
a) Pitch > lead
b) Pitch<<lead
c) Pitch < lead
d) Pitch=lead
Explanation: Pitch=lead/number of starts.
2. Let screw of 10mm pitch is needed to be cut on lathe machine. Lead screw of lathe has pitch of 6mm. Which of the following statement is correct?
a) Speed of lead screw is greater than speed of spindle
b) Speed of lead screw is less that speed of spindle
c) Speed of lead screw is equal to speed of spindle
d) None of the mentioned
Explanation: Speed of lead screw increase in relative to speed of spindle as many times the required pitch is smaller than pitch of lead screw.
3. Which of the following lathe requires very high skills for operation?
a) Centre lathe
b) Capstan lathe
c) Turret lathe
d) All of the mentioned
Explanation: Centre lathe is much more typical than other lathe machines and hence requires much more skills.
4. Which of the following have the lowest degree of automation?
a) Centre lathe
b) Capstan lathe
c) Turret lathe
d) All of the mentioned
Explanation: Centre lathe has a nominal degree of automation. Most of the operation is done manually and are not automatic.
5. Which of the following requires high labor cost?
a) Turret lathe
b) Capstan lathe
c) Centre lathe
d) All of the mentioned
Explanation: Centre lathe requires high labor cost because it requires good skills for performing operations on it.
6. Which of the following offers minimum overhead charge?
a) Turret lathe
b) Capstan lathe
c) Centre lathe
d) All of the mentioned
Explanation: Centre lathe requires low overhead charges due to small initial investment and low maintenance.
7. Which of the following lathe is most versatile?
a) Turret lathe
b) Capstan lathe
c) Centre lathe
d) All of the mentioned
Explanation: Centre lathe is capable of handling varying shape jobs and hence is most versatile.
8. Turret head in turret lathe is generally mounted on
a) Slide
b) Saddle
c) Ram
d) None of the mentioned
Explanation: Turret head is one of the important feature of turret lathe generally mounted on saddle.
9. Lead crew is present in turret lathe for thread cutting
a) True
b) False
Explanation: Thread cutting in turret lathe is generally produced by taps and die heads, hence lead screw are not present in turret lathe.
10. Lead crew is present in Capstan lathe for thread cutting
a) True
b) False
Explanation: Thread cutting in turret lathe is generally produced by taps and die heads, hence lead screw are not present in Capstan lathe.