Multiple choice questions (MCQ) on Manufacturing processes / Production Technology

Multiple choice questions (MCQ) on Manufacturing processes / Production Technology

1. In an orthogonal cutting, the depth of cut is halved and feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be

a. Doubled                    b. Halved

c. Unchanged                d. None of the above


2. Cast iron during machining process produces

a. Continuous chips                                           b. Discontinuous chips

c. Continuous chips with built up edge                 d. None of the above


3. In metal cutting operation the shear angle is the angle made by the shear plane with the the

a. Direction of the tool axis                                b. Direction of tool travel

c. Perpendicular to the direction of tool axis        d. None of the above


4. The lip angle of a single point tool is usually

a. 20 degree to 40 degree          b. 40 degree to 60 degree

c. 60 degree to 80 degree          d. None of the above


5. The parameter which completely define the chip formation, in a metal cutting process is

a. Shear angle               b. Chip tool contact length

c. Both a and b              d. None of the above


6. In which of the following machine, the work remains stationary and tool is rotated

a. Vertical boring machine          b. Horizontal boring machine

c. Jig boring machine                 d. None of the above


7. During sintering of a powder metal compact, which of the following process takes place?

a. All the pores reduce in size                b. Some of the pores grow

c. The powder particles do not meet but a bend is formed between them

d. None of the above


8. The powder metallurgy technique for the product of precision component is characterized mainly by reduction in

a. Material cost             b. Machining cost

c. Equipment cost         d. None of the above


9. Magnetic arc blow is

a. A recent welding technique                 b. Used to weld hard materials

c. Phenomenon on occurrence of splatter because magnetic field is created in d.c. arc welding.

d. None of the above


10. In rolling operation the roll rotate with surface velocity

a. Exceeding the speed of incoming metal                     b. Lower than the speed of incoming metal

c. Equal to speed of the incoming metal                        d. None of the above


11. Process of extrusion is like

a. A viscous lubricant pouring the mouth of container

b. A tooth paste coming out of its tube

c. Hard particles thrown out of a nozzle under air pressure

d. None of the above


12. Material good for extrusion is

a. Stainless steel                                   b. Brass

c. Low carbon annealed steel                  d. None of the above


13. The method most widely used for production of metal powder for use in powder metallurgy is

a. Liquid metal spray                             b. crushing using impact

c. Electrolytic deposition                       d. None of the above


14. In braze welding the filler material is

a. Distributed by capillary action

b. Melted and deposited at the point where the weld is to be made

c. Both a and b             d. None of the above


15. Amount of current necessary in resistance welding is of the order of

a. 1-2 kVA/cm2               b. 2.5-4 kVA/cm2

c. 4.5-6.2 kVA/cm2         d. None of the above


16. In the relation for cutting tool life VTn=C, the numerical value of n for high speed steel tools vary in the range of

a. 0.1 to 0.15                 b. 0.20 to 0.25

c. 0.25 to .40                 d. None of the above


17. In a turning operation the tool life of the carbide tool was found to be 20 minute and 100 minute at cutting speeds of 120 m/min respectively. What will be the tool life of the tool under the same condition but at a cutting speed of 100 m/min?

a. 31 minutes    b. 41 minutes    c. 36 minutes    d. None of the above


18. Product layout is known as

a. Analytical layout                    b. Synthetic layout

c. Static production layout          d. None of the above


19. In which of the layout, similar operations are performed at the same place always

a. Process layout                      b. Product layout

c. Combination layout                d. Fixed position layout


20. Which of the following types of flames has a supply of excess of acetylene as compared to oxygen?

a. Oxidizing flame                      b. Neutral flame

c. Carburizing flame                   d. None of the above


21. Directional solidification can be achieved by providing

a. chills and chaplets                 b. chaplets and padding

c. chills and padding                  d. chills, chaplets and padding


22. Rolling very thin strips of mild steel requires

a. large diameter rolls                b. small diameter rolls

c. high speed rolling                  d. rolling without a lubricant


23. Drop forging is used to produce

a. small components                                         b. large components

c. identical components in large numbers            d. medium size components


24. Consider the following welding processes

1. TIG welding               2. Submerged arc welding

3. Electro-slag welding   4. Thermit welding

Which of these welding processes are used for welding thick pieces of metals?

a. 1, 2 and 3                  b. 1, 2 and 4                 c. 1, 3 and 4                  d. 2, 3 and 4


25. The tool used for spinning copper is usually made for

a. Brass                        b. copper                      c. tool steal                   d. aluminium


26. Consider the following processes:

1. Mechanical pulverization                     2. Atomization

3. Chemical reduction                            4. Sintering

Which of the following processes are used for powder preparation in powder metallurgy?

a. 2, 3 and 4                  b. 1, 2 and 3                 c. 1, 3 and 4                  d. 1, 2 and 4


27. Weldable type plastic(s) include(s)

a. thermosets alone                                           b. thermoplastics alone

c. both thermosets and thermoplastics                d. neither thermosets and thermoplastics


28. Consider the following statements:

The tool life is increased by

1. built up edge formation

2. increasing cutting velocity

3. increasing back rake angle up to certain value

Which of these statements are correct?

a. 1 and 3                     b. 1 and 2                     c. 2 and 3                     d. 1, 2 and 3


29. Consider the following mechanisms:

1. Geneva gearing         2. Rack and pinion        3. Ratchet and pawl

Which of these mechanisms are used to index the work table on a transfer machine?

a. 1 and 2         b. 2 and 3         c. 1 and 3         d. 1, 2 and 3


30. Consider the following statements in respect of a grinding wheel of specifications, 51-A-36-L-7-R-23, using the standard alphanumeric codification:

1. Abrasive used in the wheel is aluminium oxide                      2. The grain size of abrasive is medium

3. The wheel grade is medium hard                                          4. It has an open structure

5. It has resinoid as bonding agent

Which of these statements are correct?

a. 1, 2 and 3                  b. 1, 3 and 4                 c. 2, 3 and 5                  d. 1, 4 and 5


31. Which of the following are produced by slush casting?

a. Hollow castings with thick walls          b. Hollow castings with thin walls

c. Thin castings                                    d. Thick castings


32. Which one of the following welding processes consists of smaller Heat Affected Zone (HAZ)?

a. Arc welding                                       b. Electron beam welding

c. MIG welding                                      d. Thermit welding


33. Gear shaping is a process of manufacturing gears. Which one of the following principles is employed by it?

a. Form cutting with gear           b. Generating tooth form with a reciprocating cutter.

c. Generating tooth form by a rotating cutter

d. Generating form with a reciprocating and revolving cutter.


34. In orthogonal cutting, shear angle is the angle between

a. Shear plane and the cutting velocity               b. Shear plane and the rake plane

c. Shear plane and the vertical direction             d. Shear plane and the direction of elongation of crystals in the chip.


35. Tool material is not suited to resistance welding is

a. Aluminium oxide      b. Satellite        c. High speed steel       d. Masonite

Consider the following statements: Chipping of a cutting tool is due to

  1. Tool material being too brittle
  2. Hot hardness of the tool material
  3. High positive rake angle of the tool

Which of the following statements are correct?

a. 1, 2 and 3                  b. 1 and 3                     c. 2 and 3                     d. 1 and 2


36. A milling cutter of 70mm diameter with 12 teeth is operating at a cutting speed of 22 m/min and a feed of 0.05 mm/tooth. The feed per minute is

a. 110mm/min               b. 35mm/min                 c. 6mm/min                   d. 60mm/min


37. The ‘spring back’ effect in press working is

a. elastic recovery of the sheet metal after removal of the load.

b. regaining the original shape of the sheet metal

c. release of stored energy in the sheet metal                 d. partial recovery of the sheet metal


38. Which one of the following is not an electric resistance method of welding?

a. Electro slag welding               b. Percussion welding

c. Seam Welding                       d. Flash welding


39. In one setting of rolls in a 3-high rolling mill, one gets

a. one reduction in thickness                  b. two reductions in thickness

c. three reductions in thickness              d. two or three reductions in thickness depending upon the setting


40. At room temperature, which one of the following is the correct sequence of increasing hardness of the tool materials?

a. Cast alloy-HSS-Ceramic-Carbide                    b. HSS-Cast alloy-Ceramic-Carbide

c. HSS-Cast alloy-Carbide-Ceramic                    d. Cast alloy-HSS-Carbide-Ceramic