Process Planning And Cost Estimation Set 4

Mechanical Engineering

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This set of Process Planning and Cost Estimation Multiple Choice Questions & Answers (MCQs) focuses on Process Planning And Cost Estimation Set 4

Q1 | Which of the following is an advantage of the Green sand molding process used in a foundry?
  • appropriate for long production run
  • very low cost process
  • sand is reusable
  • all of the mentioned
Answer: all of the mentioned
Explaination:
the green sand has an adequate amount of water which is lost during the process but it can be restored by adding the same and it is fit for reusing. this enables it
Q2 | The energy consumption is a drawback of the foundry.
  • high
  • optimum
  • intensive
  • low
Answer: high
Explaination:
in a foundry, the sources of energy used are large in number. the major drawback of the foundry is that the energy consumption in terms of material, refractories and metal is very high.
Q3 | Majority parts in transportation vehicles are made by the foundry processes.
  • true
  • false
Answer: true
Explaination:
cast metal parts account for more than 90% of an automobile engine and for more than 50% of the total weight of the tractor. thus, most of the parts are made of cast iron are manufactured in foundries.
Q4 | defects in castings cannot be identified easily.
  • internal
  • external
  • chemical
  • metallic
Answer: internal
Explaination:
the casting is usually made in bulk in foundries and it is not visible to the naked eyes. the castings have to be sent for x-ray testing and such kind of test to find out the internal defects. identifying internal defects is a tough task in foundries.
Q5 | The directional properties are imparted to the castings made in foundries.
  • single
  • double
  • spherical
  • multiple
Answer: single
Explaination:
when the pouring takes place in the foundry, the uniform melting of the metal is ensured so that the casting prepared has adequate strength. this imparts a uniform and a single directionality to the castings that are produced and provides better vibration damping capacity to the cast parts.
Q6 | In the foundry, the metal joining process is employed.
  • true
  • false
Answer: false
Explaination:
the foundry produces the castings that are in a single piece. even if the pattern of the first and second half is different, it produces the casting in a single piece. hence, the metal joining process is eliminated in the foundry.
Q7 | Foundry process is used to make intricate parts.
  • true
  • false
Answer: true
Explaination:
the foundry process is suitable for both small and large components. it gives a high rate of production, small dimensional
Q8 | is the speed at which the metal is removed by the tool from the work piece.
  • feed
  • cutting speed
  • depth of cut
  • none of the mentioned
Answer: cutting speed
Explaination:
it can be easily understood by looking at the definition of the cutting speed. cutting speed is a peripheral speed of the work.
Q9 | Which of the following represents the formula for cutting speed? cs =cutting speed, D= diameter of work, N= rpm.
  • cs = (3.14*d*n)
  • cs = (d*n)
  • cs = (3.14*d)/n
  • none of the mentioned
Answer: cs = (3.14*d*n)
Explaination:
cs = (3.14*d*n) – this is the formula for finding the cutting speed.
Q10 | is the distance the tool advances for each revolution of the work.
  • feed
  • depth of cut
  • metal removal rate
  • none of the mentioned
Answer: feed
Explaination:
the feed of a cutting tool in a lathe work is the distance the tool advances for each revolution of the work. increased feed reduces the cutting time.
Q11 | Which of the following is the unit of the feed?
  • mm / minute
  • mm / revolution
  • mm * minute
  • none of the mentioned
Answer: mm / revolution
Explaination:
mm / revolution is the right unit for feed. in british system it is expressed in inches per revolution.
Q12 | The depth of cut is the distance measured from the machined surface to the surface of the work piece, which is uncut.
  • parallel
  • perpendicular
  • at 45 degree
  • none of the mentioned
Answer: perpendicular
Explaination:
it is the perpendicular distance measured from the machined surface to the surface of the work piece, which is uncut.
Q13 | Which of the following represents the unit of metal removal rate?
  • mm/revolution
  • mm*mm/revolution
  • mm*mm*mm/revolution
  • none of the mentioned
Answer: mm*mm*mm/revolution
Explaination:
mm*mm*mm / revolution is the right unit for the metal removal rate. if we put the units of cutting speed, depth of cut
Q14 | Which of the following represents the unit for machining time?
  • mm / minute
  • minute / revolution
  • minute
  • none of the mentioned
Answer: minute
Explaination:
machining time is simply a time so its unit must be matched with time’s unit. minute is the right unit for machining time.
Q15 | For general purposes, ratio of the depth of cut to the feed varies from           
  • 10:1
  • 1:10
  • 100:1
  • 1:100
Answer: 10:1
Explaination:
the ratio varies from 10:1. the depth of cut varies inversely as the cutting speed.
Q16 | Which of the following is used to drive the work piece?
  • carriers
  • catch plates
  • both carriers and catch plates
  • none of the mentioned
Answer: both carriers and catch plates
Explaination:
work piece can be driven by using both of these. catch plates are either screwed or bolted to the nose of the tailstock spindle while the carriers consists of a cast iron or forged steel body.
Q17 | Drilling is performed by holding the work by a chuck.
  • true
  • false
Answer: true
Explaination:
it can be seen from the working of lathe operations. several types of chucks are there like 4 jaw chuck, 3 jaw chuck and so on.
Q18 | Knurling can be performed by special attachments.
  • true
  • false
Answer: false
Explaination:
this is false. knurling can be done by a chuck on holding work piece between centres.
Q19 | Grinding can be performed by             
  • using faceplates or angle plates
  • using chucks
  • special attachments
  • none of the mentioned
Answer: special attachments
Explaination:
grinding can be done by special attachments. grinding is a type of machining using an abrasive type of wheel as the cutting tool.
Q20 | Taper boring and the under boring can be performed by             
  • centers
  • face plates or angle plates
  • special attachments
  • none of the mentioned
Answer: face plates or angle plates
Explaination:
both types of plates can be used for this purpose. a face plate consists of a circular disk bored out and threaded to sit the nose of the lathe spindle while angel plate
Q21 | Milling can be performed by            
  • centres
  • face plates or angel plates
  • chucks
  • special attachments
Answer: special attachments
Explaination:
milling can be performed by special attachments. milling machine is a machine tool that removes metal as the work is fed against a rotating multipoint cutter.
Q22 | Spinning can be done by           
  • centres
  • face plates or angle plates
  • special attachments
  • none of the mentioned
Answer: centres
Explaination:
this operation can be done by using centres. spining winding is also done by this method.
Q23 | Eccentric turning can be performed by using special attachments.
  • true
  • false
Answer: false
Explaination:
this is false. eccentric type of turning can be performed by using centres or chucks.
Q24 | Shaping can be performed more effectively by milling machine.
  • horizontal
  • vertical
  • can’t say anything
  • none of the mentioned
Answer: vertical
Explaination:
vertical milling machines are
Q25 | Form cutting can be performed more effectively by milling machine.
  • horizontal
  • vertical
  • can’t say anything
  • none of the mentioned
Answer: horizontal
Explaination:
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.
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