Category: Machine Tools & Machining Objective Questions

Machine Tools Multiple Choice Questions on “Lathe : Feed Mechanism”.

1. Which type of feeding does feed mechanism enables?
a) automatic
b) manual
c) automatic and manual both
d) none of the mentioned
Answer: a
Clarification: Feed mechanism enables automatic feed. It enables feeding for the tool longitudinal and traversely whenever needed.

2. Which of the following indicates the benefit of automatic feeding?
a) the finish on the work will be better
b) the feeding of the tool will be at a nonuniform continuous rate
c) accuracy will be more
d) all of the mentioned
Answer: d
Clarification: All sentences are true except the one which says that the feeding of the tool will be at a nonuniform continuous rate. Actually, the feeding of the tool will be at a uniform continuous rate.

3. Automatic feed requires more time to finish the work.
a) true
b) false
Answer: b
Clarification: This is false. Manual feed requires more time for finishing the work. Automatic feed requires less time to finish the work.

4. Which of the following is the part of feed mechanism?
a) spindle gear
b) tumbler gear unit
c) apron mechanism
d) all of the mentioned
Answer: d
Clarification: All are the parts of feed mechanism. Apart from spindle gear, tumbler gear unit and apron mechanism, there are some other parts like fixed stud gear, change gear unit, quick change gear box and so on.

5. Feed mechanism requires manual labor.
a) true
b) false
Answer: b
Clarification: This is work. Feed mechanism removes the need of manual labor. It works automatically.

6. The feed of a cutting tool in a lathe work is the distance the tool advances for each revolution.
a) true
b) false
Answer: a
Clarification: This is the definition of the feed. This feed is also expressed in mm/revolution. In british system, it is expressed in inch per revolution.

7. What happen if feed increases?
a) cutting time increases
b) cutting time decreases
c) no effect on cutting time
d) none of the mentioned.
Answer: b
Clarification: Increased feed always reduces the cutting time. As the feed is increased, the speed of the cutting is increased and as the speed of the cutting is increased, its time will definitely decreased.

8. Increased feed_____
a) increases tool’s life
b) decreases tool’s life
c) no effect on tool’s life
d) none of the mentioned
Answer: b
Clarification: Increased feed greatly reduces the tool life. As the feed is increased, its speed will also increased. So forces acting on the tool will be more stronger, more powerful. Hence, it reduces the tool’s life.

9. Which of the following is not the part of the feed mechanism?
a) fixed stud gear
b) quick change gear box
c) feed shaft
d) none of the mentioned
Answer: d
Clarification: These all are the parts of the feed mechanism. Due to these all parts, it works more accurately and give the more-better surface finish.

10. The feed mechanism enables feed for the tool______ whenever needed.
a) longitudinally
b) traversely
c) longitudinal and traversely both
d) none of the mentioned
Answer: c
Clarification: The proportionate tool movement for each revolution of the work is achieved through all units of the feed mechanism.

Machine Tools and Machining Interview Questions and Answers for experienced on “Lathe : Methods of Taper Turning”.

1. Which of the following is not the method of taper turning?
a) compound rest method
b) tailstock offset method
c) attachment method
d) none of the mentioned
Answer: d
Clarification: All are methods of taper turning.By using compound rest method and and attachment method, both internal and external taper can be turned while tailstock offset method is used only for external tapers.

2. From tool method is used where accuracy is the major criterion.
a) true
b) false
Answer: b
Clarification: This is false. From tool method is used when accuracy is not the major criterion.The form tool should be set at right angels to the axis of the work.

3. From tool method is generally used for_____ production for producing_____ length of taper.
a) mass, small
b) mass, long
c) little, small
d) little, long
Answer: a
Clarification: This method is used for mass production for producing small length of taper.

4. Tailstock method is highly suitable for producing steep tapers.
a) true
b) false
Answer: b
Clarification: This is false. Tailstock method is not suitable for producing steep tapers.

5. Attachment method can produce only small taper.
a) true
b) false
Answer:
Clarification: This is false. Lengthy taper can be produced by this method.

6. In compound slide method, which of the following is swiveled?
a) top slide
b) swivel base
c) apron
d) none of the mentioned
Answer: a
Clarification: Top slide is swiveled in this method. It is swiveled to half the included angel of the taper.

7. In compound slide method, one part of compound rest is swiveled to_____ the included angle of the taper.
a) the same as
b) half
c) double
d) none of the mentioned
Answer: b
Clarification: In compound slide method, one part of compound rest is swiveled (at half the included angle of the taper). We can easily set this compound slide.

8. In compound rest method, the amount of taper for setting the angle is calculated from this formula, tan of angle of taper =_____
a) (D-d) / L
b) (D-d) / 2L
c) (D-d) / 4L
d) none of the mentioned
Answer: b
Clarification: (D-d) / 4L – this is the formula for the tan of the angel of taper. Taper is the shape in which the diameter of the both ends are different.

9. Which type of tapers can be produced by using compound rest method?
a) internal
b) external
c) both internal and external
d) none of the mentioned
Answer: c
Clarification: Both internal and external taper can be produced by using compound slide method. But there is one disadvantage. We can only give hand feed so we can’t expect a high accurate and mass work.

10. Which of the following is not true for compound slide method?
a) threads, which are there on taper portion cannot be produced
b) steep taper cannot be produced
c) taper length is limited to the movement of the top slide
d) none of the mentioned
Answer: b
Clarification: All mentioned sentences are true except the sentence which says that steep taper can’t produced by this method. Steep taper can be produced by this method.

11. In attachment method, the bar having graduations in degree is set at the_____ with the lathe axis.
a) 0 degree
b) 90 degree
c) any desired angle
d) 180 degree
Answer: c
Clarification: The bar is set at any desired angle with the lathe axis. The principle of turning taper by attachment is to guide the tool in a straight path set an angel to the axis of rotation of the work piece, while the work is being revolved between centers or by a chuck aligned to the lathe axis.

12. In compound slide method, taper length is limited to the movement of_____
a) apron
b) swivel base
c) top slide
d) none of the mentioned
Answer: c
Clarification: Taper length is limited to the movement of top slide in this method. Along with this, easily setting of the compound slide can be done easily.

13. The taper can be turned up to maximum setting angle of_____ for both outside and inside tapers with taper attachment and automatic feed.
a) 5 to 6 degree
b) 1 to 2 degree
c) 10 to 12 degree
d) none of the mentioned
Answer: c
Clarification: The taper can be turned up to maximum setting angle of 10 to 12 degree for both outside and inside tapers with taper attachment and automatic feed.

14. Attachment method is most suitable for producing duplicate tapers.
a) true
b) false
Answer: a
Clarification: Attachment method is most suitable for producing duplicate tapers because the change in length of job does not affect the taper.

15. Which of the following is not true for attachment method?
a) lengthy tapers can be produced
b) the alignment of the lathe center is disturbed
c) power feed can be given
d) none of the mentioned
Answer: b
Clarification: All the sentences are true except the sentence which says that the alignment of the lathe center is disturbed. The alignment of the lathe center is not disturbed in attachment method.

Machine Tools and Machining for interviews,

Machine Tools Multiple Choice Questions on “Operation on Drilling Machine”.

1. Which of the following operation, we can’t perform on drilling machine?
a) reaming
b) tapping
c) lapping
d) none of the mentioned
Answer: d
Clarification: Although drilling is primarily intended for drill but now it becomes a versatile tool. It can perform various operations including reaming, tapping, lapping and so on.

2. Tapping attachment is included in_______ method of tool holding devices.
a) by chucks
b) by a sleeve
c) by directly fitting in the spindle
d) none of the mentioned
Answer: d
Clarification: It is included in special attachment method. In tapping, one end is always thinner than other end.

3. Floating holder is included in______ method of tool holding devices.
a) by directly fitting in the spindle
b) by special attachments
c) by a socket
d) none of the mentioned
Answer: b
Clarification: It is included in special attachment. Floating holder is a type of holder that permits certain amount freedom to enable the tool with a purpose of maintaining a proper path relative to the work.

4. Which of the following method is not used for holding tool?
a) by a sleeve
b) by chucks
c) by a socket
d) none of the mentioned
Answer: d
Clarification: These all methods are used for holding tools. There are various types of chucks 2 jaw chuck, three jaw chuck etc. Sleeve and socket are also used for this purpose.

5. We can’t perform grinding operation in a drilling machine.
a) true
b) false
Answer: b
Clarification: This is false. Now, drill machine becomes a versatile tool. We can perform grinding operation.

6. Which of the following device is not used for holding the work in a drilling machine?
a) step block
b) drill jigs
c) both step block and drill jigs
d) none of the mentioned
Answer: d
Clarification: Both are used for holding the work in drilling machine.

7. In drilling operation, work should be held by hand.
a) true
b) false
Answer: b
Clarification: Work shouldn’t be held by hand as it may causes injuries to the operator.

8. The drilling machine is the second most important machine tool in a workshop.
a) true
b) false
Answer: a
Clarification: Lathe is the most important machine tool followed ny drill and shaper.

9. The drilling machine was primarily designed to originate a _____
a) flat surface
b) cylindrical surface
c) taper surface
d) none of the mentioned
Answer: d
Clarification: It was primarily designed to originate a hole but now it can perform variety of operations.

10. For drilling operation, the drill rotates with_____ pressure if job is held on earth.
a) upward
b) downward
c) 45 degree inclined to both planes
d) none of the mentioned
Answer: b
Clarification: It rotates with downward pressure if the job is below the machine on the earth.

Machine Tools and Machining Problems on “Parts of Standard Shaper”.

1. Standard shaper is also known as plain shaper.
a) true
b) false
Answer: a
Clarification: As per the definition of standard shaper. This shaper uses a linear tool path for machining.

2. A shaper is termed as standard when the table has _____ movements.
a) only one
b) only two
c) only three
d) none of the mentioned
Answer: b
Clarification: This is the definition of standard shaper. Other types of shaper are horizontal shaper, draw-cut shaper, universal shaper etc.

3. Which type of movements of table can be given to the feed?
a) horizontal
b) vertical
c) horizontal or vertical
d) none of the mentioned
Answer: c
Clarification: Both horizontal and vertical table movements can be given to feed. Linear relative motion between a work piece and single point cutting tool is given.

4. The table must be supported at the outer end.
a) true
b) false
Answer: b
Clarification: It is not compulsory that the must be supported at the outer end. It may or may not be supported at outer end.

5. The base of standard is made of cast iron.
a) true
b) false
Answer: a
Clarification: As per the construction of shaper machine, it may be made of cast iron as it provide great strength and stability.

6. The base of the standard shaper is able to_____
a) resist vibration
b) take up high compressive
c) both resist vibration and take up high compressive
d) none of the mentioned
Answer: c
Clarification: This is the property of standard shaper’s base. As it is made of cast iron and other strong component it has these properties.

7. The base may be rigidly bolted to the floor of the shop or on the bench according to the size of the machine.
a) true
b) false
Answer: a
Clarification: As per the construction of standard shaper. This type of arrangement of base provide great stability to machine and make the machine more suitable for its purpose.

8. Which of the following is a box like casting mounted up on the base.
a) column
b) crossrail
c) toolhead
d) none of the mentioned
Answer: a
Clarification: Column is situated on the base so we can feel that it is a box like casting mounted up on the base because of its arrangement.

9. Which of the following encloses the ram drive mechanism?
a) crossrail
b) toolhead
c) saddle
d) none of the mentioned
Answer: d
Clarification: Column encloses the ram drive mechanism. This ram can be adjusted for stroke. It can move faster in return stroke due to its geometry.

10. The ram reciprocates on the top of the column.
a) true
b) false
Answer: a
Clarification: This is true. In ram movement, due to slotted link, ram move faster in case of return stroke as compare to forward stroke..

11. How many machined guideways are provided on the top of the column?
a) one
b) two
c) four
d) none of the mentioned
Answer: b
Clarification: Two guideways are provided. Guideways are like a tracko or path along with simething move.

12. The _____ face of the column serves as the guideways for the crossrail.
a) front horizontal
b) back horizontal
c) front vertical
d) back vertical
Answer: c
Clarification: Front vertical face serves as the guideways for the crossrail.

13. The ram is reciprocating member of the shaper.
a) true
b) false
Answer: a
Clarification: It is the property of ram. Its speed is high in case of return stroke and low in forward stroke.

14. Which type of feed movements of tool does the toolhead provide?
a) vertical
b) angular
c) both vertical and angular
d) none of the mentioned
Answer: c
Clarification: Toolhead provides these both feed movements of tool. Shaper toolhead is made of the clapper box, clapper block, toolpost and hinge pin.

15. The toolhead allows the tool to have an automatic relief during its return stroke.
a) true
b) false
Answer: a
Clarification: It is the function of the toolhead. It works like an apron.

To practice problems on all areas of Machine Tools and Machining,

Machine Tools Multiple Choice Questions on “Milling Machine Operations”.

1. Shaping can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: b
Clarification: Vertical milling machines are of two types: bedmill and turrent mill and due to its construction features these vertical type milling machines can performed shaping easily.

2. surfacing can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: b
Clarification: Surfacing can be performed more effectively by vertical milling machine. This machine has a spindle. It rotates in vertical direction over the table.

3. Form cutting can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: a
Clarification: Form cutting can be performed more effectively by horizontal milling machine. The spindle in the horizontal milling machine is mounted on the horizontal arbor above table.

4. Slab milling can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: a
Clarification: Slab milling can be performed more effectively by horizontal milling machine. This slab mill is also used in gang milling.

5. Drilling can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: b
Clarification: In vertical milling, the workpiece is held by a horizontal table and this horizontal table rotates about a vertical axis. There are none-rotating tools which can be fed by crossrail and then drilling operation is performed which is more effective in nature.

6. Boring can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: b
Clarification: Vertical boring milling is more effectively as it has wide application in ring gear blanks, turbine casting and locomotive tires and so on.

7. Dovetailing can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: b
Clarification: As per the classification of milling operations. Dovetailing means joint something like link together with the help of dovetail.

8. Straddle milling can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: a
Clarification: Sometimes we machine two or more vertical parallel surfaces at a single cut, this type of operation is known as straddle milling. Horizontal milling can perform it more nicely.

9. Angular milling can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: c
Clarification: Angular milling is a type of milling that mills flat surfaces which are neither parallel or perpendicular to the axis of milling cutter. It is performed more accurately by both milling machines: horizontal and vertical.

10. Cutting T-slots can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) can’t say anything
d) none of the mentioned
Answer: b
Clarification: This process depends upon the size of the T bolts which are going to be used and its typical milling process which can be performed by vertical milling more effectively.

11. Slotting can be performed more effectively by ______ milling machine.
a) horizontal
b) vertical
c) both horizontal and vertical
d) none of the mentioned
Answer: c
Clarification: Slotting is the removal of material in the form of chips by a relative movement of a tool with a cutting edge relative to a workpiece along a non-circular trajectory.