Lathe Multiple Choice Questions and Answers - Set 01 - ObjectiveBooks

# Practice Test: Question Set - 01

1. Tumbler gear quadrant is used for
(A) Increasing the speed of the spindle
(B) Decreasing the speed of the spindle
(C) Changing the direction of rotation of the lead screw
(D) Changing the direction of the spindle

2. The included angle of live centre nose is
(A) 30°
(B) 45°
(C) 60°
(D) 90°

3. A lathe half centre is used
(A) To support the workpiece always
(B) To turn long workpiece
(C) Because it is easy to lubricate the workpiece
(D) To face the workpiece up to the end of the centre hole

4. By taper turning attachment, taper can be cut on any workpiece which is held
(A) In a chuck
(B) Between centers
(C) Neither 'A' nor 'B'
(D) Either 'A' or 'B'

5. For plain turning a 60 mm diameter workpiece using HSS tool with recommend cutting speed of 30 metre / min., the rpm should be
(A) 80 rpm
(B) 159 rpm
(C) 192 rpm
(D) 318 rpm

6. To prevent lathe bed guideways from damaging by chuck while mounting
(A) Take the help of supervisor
(B) Support it with screw jack
(C) Lift it with hand crane
(D) Place a wooden piece on the guideways

7. Which range of cutting speed is set for turning a mild steel using HSS tool?
(A) 15 to 20 m/min
(B) 35 to 50 m/min
(C) 50 to 80 m/min
(D) 70 to 200 m/min

8. State the direction of rotation of job and lead screw while cutting left hand thread viewing from tailstock end. (CW = clockwise; ACW = anticlockwise).
(A) Both the job and lead screw rotate CW
(B) Both the job and lead screw rotate ACW
(C) Job rotates CW and lead screw rotates ACW
(D) Job rotates ACW and lead screw rotates CW

9. Inserted HSS tool bits are more useful for the operation
(A) Boring
(D) All the above

10. While step turning, it is preferred to turn first
(A) Small diameter step
(B) Large diameter step
(C) Either 'A' or 'B'
(D) Neither 'A' nor 'B'

11. Which one of the following materials is used for manufacturing centre drills?
(A) Cast steel
(B) Mild steel
(C) High speed steel
(D) Cast iron

12. Scroll and gear mechanism is employed in
(A) Three-jaw chuck
(B) Four-jaw chuck
(C) Magnetic chuck
(D) Collet chuck

13. Which among the following materials is used for steady rest pads?
(A) Mild steel
(C) Brass
(D) Aluminium

14. The compound slide swivel base is set at 45° to the centre line of the lathe. The degree of the reading at the cross slide index will be
(A) 135°
(B) 90°
(C) 45°
(D) 30°

15. Which one of the following methods is used to press the mandrel squarely to the workpiece?
(A) By hammering
(B) By arbor press
(C) By tailstock
(D) By vice

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