MANUFACTURING PROCESS II

Multiple Choice Questions 358 Pages

Savitribai Phule Pune University

Mechanical Engineering

Contributed by

Aarav Patel

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Seat No -
Total number of questions : 60
1001438_T1 MANUFACTURING PROCESS II
Time : 1hr
Max Marks : 50
N.B
1) All questions are Multiple Choice Questions having single correct option.
2) Attempt any 50 questions out of 60.
3) Use of calculator is allowed.
4) Each question carries 1 Mark.
5) Specially abled students are allowed 20 minutes extra for examination.
6) Do not use pencils to darken answer.
7) Use only black/blue ball point pen to darken the appropriate circle.
8) No change will be allowed once the answer is marked on OMR Sheet.
9) Rough work shall not be done on OMR sheet or on question paper.
10) Darken ONLY ONE CIRCLE for each answer.
Q.no 1. Use of tail stock in cylindrical grinding machine is
A : To drive the work piece
B : To give feed to the wheel head
C : To provide Speed to

grinding wheel
D : To support the

other end of the

work piece
Q.no 2. Carbide tipped tools usually have
A : Negative rake angle
B : Positive rake angle
C : Any rake angle
D : No rake angle
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Q.no 3. The operation of producing grooves around the periphery of a cylindrical or conical
workpiece is called
A : profile milling
B : Gang milling
C : Saw milling
D : Helical milling
Q.no 4. If l=length of travel of the drill in mm, n=rpm of the drill, s= feed per revolution of the
drill in mm. Then machining time can be given as_____
A : (l*n)/s
B : (l*s)/n
C : l/(n*s)
D : (1+n)/s
Q.no 5. Which of the following range of numbers represents dense structure of abrasives?
A : 0-7
B : 8-10
C : 10-12
D : 12-16
Q.no 6. If a cutting tool is designed as 8°-14°-6°-8°-8°-19°-1mm what is the side Rake angle of the
tool
A : 14°
B : 19°
C : 6°
D : 8°
Q.no 7. As the abrasive flow rate increases, what happens to the volumetric removal rate in
AJM?
A : Increases
B : Decreases
C : Increase and then decrease
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D : Decrease and then increase
Q.no 8. Steady rest is
A : An additional support provided for long jobs
B : Used while turning unsymmetrical
objects
C : Used during Plain cutting only
D : Used when a lathe is
subject to vibrations
Q.no 9. Lapping is an operation of_________
A : Making a cone-shaped enlargement
of the end of a hole
B : Smoothing and squaring the
surface around a hole
C : Sizing and finishing a
small diameter hole
D : Producing a hole by
removing metal along
the circumference of
a hollow cutting tool
Q.no 10. A grinding ratio of 200 implies that the
A : Grinding wheel wears 200 times the
volume of the material removed
B : grinding wheel wears 0.005 times
the volume of the material removed
C : aspect ratio of abrasive
particles used in the
grinding wheel is 200
D : ratio of volume
of abrasive particle
to that of grinding
wheel is 200
Q.no 11. For which of the following operations, broaching can be used?
A : Threading
B : Grinding
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C : Spline cutting
D : Increasing the size of the
existing hole for a certain
length
Q.no 12. The angle between the face and flank of the single point cutting tool is known as
A : Rake angle
B : Clearance angle
C : Lip angle
D : Point angle
Q.no 13. Of the following properties of nozzle, which of them does not influence the MRR in
AJM?
A : Size
B : Material
C : Outside temperature
D : Distance from work piece
Q.no 14. Twist drills are made of
A : High speed steel
B : Mild Steel
C : Stainless steel
D : High Carbon Steel
Q.no 15. When the metal is removed by erosion caused by rapidly recurring spark discharges
between the tool and work, the process is known as
A : Electrochemical machining
B : Electro-discharge machining
C : Ultrasonic machining
D : None of these
Q.no 16. The operation of making a cone-shaped enlargement of the end of a hole is known as
A : counter-sinking
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B : Counter-boring
C : Treppaning
D : Spot facing
Q.no 17. Which of the following is a not a surface finishing process?
A : Honing
B : Buffing
C : Lapping
D : Turning
Q.no 18. A grinding wheel is said to be of _________ if it holds the abrasive grains more securely
A : Soft grade
B : Medium grade
C : Hard grade
D : very soft grade
Q.no 19. A half nut is
A : Damaged nut
B : Nut manufactured in parts
C : Nut with half the standard pitch
D : Mechanism that locks the
lathe carriage to the load
screw for thread cutting
Q.no 20. In centreless grinding, workpiece centre will be
A : Above the line joining the two
wheel centres
B : Below the line joining the two
wheel centres
C : On the line joining the two
wheel centres
D : At the intersection of the
line joining the wheel
centres with the workpiece
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Q.no 21. In Electro discharge machining, materials with low melting point have which type of
material removal rate?
A : Very low
B : Low
C : Medium
D : High
Q.no 22. Cast iron during machining produces
A : Continuous chips
B : Dis-Continuous chips
C : Continuous chips with
built-up-edge
D : None of these
Q.no 23. A coarse grained grinding wheel is used to grind
A : Soft and Hard materials
B : Soft and ductile materials
C : Hard Material
D : Tough Material
Q.no 24. Which of the following process has highest rate of metal removal
A : Electric Discharge Machining (EDM)
B : Electro-Chemical Machining (ECM)
C : Ultrasonic Machining (USM)
D : Laser Beam Machining (LBM)
Q.no 25. Removing dull grains in order to make grinding wheel sharp is known as
A : Loading
B : Glazing
C : Dressing
D : Trueing
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Q.no 26. Which of the following method is not used for holding tool in drilling machine?
A : by a sleeve
B : by four jaw chucks
C : by a socket
D : By tool holder
Q.no 27. Which of the following symbol’s range of alphabet represent soft grain in grinding
wheel?
A : A – H
B : I – P
C : Q – T
D : T – Z
Q.no 28. The main purpose of a boring operation, as compared to drilling, is to
A : Drill a hole
B : Finish the drilled hole
C : Correct the hole
D : Enlarge the existing hole
Q.no 29. In Abrasive jet machining, work piece material of removed by which of the following
means?
A : Vaporization
B : Electro plating
C : Mechanical abrasion
D : Corrosion
Q.no 30. In centerless grinders, the regulating wheel is inclined at
A : 0° to 8°
B : 9° to 15°
C : 16° to 20°
D : 21° to 25°
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Q.no 31. Which of the following specified grinding wheel will have Aluminum oxide abrasive?
A : Z 46 K 5 B 17
B : C 600 K 5 B 17
C : C 8 K 5 B 17
D : A 80 K 5 B 17
Q.no 32. Which one of the following process is worked on principle of Mechanical errosion
A : AJM
B : EDM
C : ECM
D : PAM
Q.no 33. Amplitude of oscillation of tool in USM ranges between?
A : 0.1-10 μm
B : 10-40 μm
C : 50-100 μm
D : 100-1000 μm
Q.no 34. It is desired to perform the operations like drilling, reaming, counter-boring etc. on a
work piece. Which of the following machine will be used?
A : Sensitive drilling machine
B : Radial drilling machine
C : Gang drilling machine
D : Multiple spindle drilling
machine
Q.no 35. Which one of the following process is worked on principle of electrolysis using eletrolyte
A : EDM
B : USM
C : AJM
D : ECM
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Q.no 36. What is the general life of Tungsten carbide material nozzle in AJM?
A : 1 – 8 hrs
B : 2 – 5 hrs
C : 10 – 15 hrs
D : 25 – 40 hrs
Q.no 37. Which of the following specified grinding wheel will have Silicon carbide abrasive?
A : Z 46 K 5 B 17
B : C 600 K 5 B 17
C : A 8 K 5 B 17
D : A 80 K 5 B 17
Q.no 38. In machining operation, Uncut chip thickness t0= 0.8 mm and Chip thickness tc=1.2
mm. The correct option for the chip thickness ratio (r) is
A : 0.4
B : 0.66
C : 0.84
D : 1.5
Q.no 39. At high cutting speed, high temperature at tool-chip interface is caused by
1. Heat generation rate increases with an increase in cutting speed
2. Friction coefficient (μ) decreases with an increase in cutting speed
3. The time required to transfer the heat decreases with an increase in cutting speed
4. Localization of heat takes place with an increase in cutting speed
A : 1,3 &4
B : 1,2,3 &4
C : 1,2,& 3
D : 2,3 &4
Q.no 40. If n=number of divisions required, then find the number of holes to be moved in direct
indexing
A : 12/n
B : 24/n
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C : 40/n
D : 120/n
Q.no 41. Find the angle at which the compound rest should be set up to turn taper on the
workpiece having a length of 20mm, larger diameter 45mm and the smaller diameter 30mm.
A : 2 Degree 9 Minutes
B : 3 Degree 9 Minutes
C : 4 Degree 9 Minutes
D : 5 Degree 9 Minutes
Q.no 42. In AJM, surface roughness value will vary between which values?
A : 0.01 – 0.10 μm
B : 0.15 – 1.5 μm
C : 2.0 – 5.0 μm
D : 7.0 – 10.0 μm
Q.no 43. Grinding wheel is specified as “A 46 K 5 B 17”. Grain size of a wheel will be
A : Coarse
B : Medium
C : Fine
D : Very Fine
Q.no 44. Which one of the following is not a hybrid non-conventional machinig process
A : ECDM
B : AWJM
C : Ultrasonic assisted EDM
D : EBM
Q.no 45. What is the value of abrasive grain flow rate in Abrasive jet machining?
A : 0.1 – 2 g/min
B : 3 – 20 g/min
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