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# Past Year Questions: Machining Processes Mechanical Engineering Notes | EduRev

## Mechanical Engineering : Past Year Questions: Machining Processes Mechanical Engineering Notes | EduRev

The document Past Year Questions: Machining Processes Mechanical Engineering Notes | EduRev is a part of the Mechanical Engineering Course Manufacturing and Industrial Engineering.
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Question 1:Grinding ratio is defined as Volume of wheel wear

Question 2:The binding material used in cemented carbide cutting tools is

[PI 2011]

Question 3:During turning of a low carbon steel bar with TiN coated carbide insert, one needs to improve surface finish without sacrificing material removal rate. The achieve improved surface finish one should

[PI 2010]

Question 4:A side and face cutter 125 mm diameter has 10 teeth. If operates at a cutting speed of 14 m/ min with a table traverse 100 mm/min the feed per tooth of the cutter is

[PI 2002]

Question 5:A grinding wheel is said to be glazed if

[PI 1995]

Question 6:If the index crank of a dividing head is turned through one complete revolution and 10 holes in a 30 hole Circle plate, the workpiece turns through (in degrees)

[PI 1992]

Question 7:Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are 5 mm and 25 mm respectively and if the machinability indices for the work materials are 120 (brass) and 40 (alloy steel)

[PI 1992]

Question 8:In a grinding wheel marked with AA-48-L-7-V25, L refers to

[PI 1992]

Question 9:A drilling machine has to be designed with 8 spindle speeds ranging approximately between 120 to 1200 rpm. The 5th spindle speed is

[PI 1991]

Question 10:Assertion (A): Single start threads are used for fastening purposes.
Reason (R): Single start threads are easier to produce in a lathe.

[PI 1990]

Question 11:The length, width and thickness of a steel sample are 400 mm, 410 mm, 40 mm and 20 mm, respectively. Its thickness needs to be uniformly reduced by 2 mm in a single pass by using horizontal slab miling. The miling cutter (diameter : 100 mm, width ; 50 mm) has 20 teeth and rotates at 1200 rpm. The feed per tooth is 0.05 mm. The feed direction is along the length of the sample. If the over-travel distance is the same as the approach distance, the approach distance and time taken to complete the required machining task are :

[ME 2019,Set-1]

Question 12:Better surface finish is obtained with a large rake angle because

[ME 2014,Set-4]

Question 13:Cutting tool is much harder than the workpiece.Yet the tool wears out during the tool-work interaction, because

[ME 2014,Set-3]

Question 14:The time taken to drill a hole through a 25 mm thick plate with the drill rotating at 300 rpm and moving at a feed rate of 0.25 mm/rev is

[ME 2002]

Question 15:The hardness of a grinding wheel is determined by the

[ME 2002]

Question 16:A conventional lathe and a CNC lathe are under consideration for machining a given part. The relevant data are shown below:

The machine preferred for producing 100 pieces is

[ME 2000]

Question 17:Abrasive material used in grinding wheel selected for grinding ferrous alloys is

[ME 2000]

Question 18:Plain milling of mild steel plates produces

[ME 1995]

Question 19:Among the conventional machining processes, maximum specific energy is consumed in

[ME 1995]

Question 20:Cutting power consumption in turning can be significantly reduced by

[ME 1995]

Question 21:A grinding wheel A 27 K 7 V is specified for finish grinding of a HSS cutting tool. What do you understand about the wheel from the above code.
Is this an appropriate choice?

[ME 1994]

Question 22:A milling cutter having 8 teeth is rotating at 150 rpm. If the feed per tooth is 0.1 mm, the speed in mm per minute is

[ME 1993]

Question 23:A milling cutter having 10 teeth is rotating at 100 rpm. The table feed is set at 50-mm per minute. The feed per tooth in mm is

[ME 1991]

Question 24:For cutting double start screw threads of pitch 1.0 mm on a lathe, the thread cutting tool should have a feed rate of

[ME 1991]

Question 25:If the longitudinal feed in centreless grinding is expressed by Vf = πDN sinα, D stands for

[ME 1990]

Question 26:Pure metal pose machinability problem in turning operations. The reason is the

[ME 1988]

Question 27:Cutting speed in grinding is set to a high value to

[ME 1988]

Question 28:The ideal cutting fluid for low speed machining of metals should be one which

[ME 1988]

Question 29:If in a turning operation both the feed rate and the nose radius are doubled the surface finish value will be

[ME 1987]

Question 30:The standard specification of a grinding wheel is A-46-M-6-V-21. It means a wheel of

[ME 1987]

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## Manufacturing and Industrial Engineering

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