Unconventional Machine Process Set 1 MCQs

Q1 | Non-Traditional machining is recommended when we need which of the following features?

complex shapes
high surface quality
low-rigidity structures
all of the mentioned

Answer: all of the mentioned

Explaination:
for above requirements this machining is used.

Q2 | Non-Traditional machining can also be called as

contact machining
non-contact machining
partial contact machining
half contact machining

Answer: non-contact machining

Explaination:
tool and work piece are at a distance apart in this type of machining.

Q3 | In which of the following industries, Non-traditional machining methods play an important role?

automobile
aerospace
medical
all of the mentioned

Answer: all of the mentioned

Explaination:
non-traditional methods are used widely in many industries.

Q4 | Different classifications of Non-traditional machining based on source of energy are

mechanical
thermal
chemical and electro-chemical.
all of the mentioned

Answer: all of the mentioned

Explaination:
it can be classified into the above mentioned categories.

Q5 | In mechanical machining, material is removed by

erosion
corrosion
abrasion
vaporization

Answer: erosion

Explaination:
abrasive grains remove material by mechanical erosion in usm.

Q6 | Material in thermal machining is removed by which of the following means?

vaporization
melting
electro-plating
all of the mentioned

Answer: all of the mentioned

Explaination:
in this machining, heat is the source of energy.

Q7 | Which of the following process comes under mechanical machining?

usm
edm
lbm
pam

Answer: usm

Explaination:
usm removes material by mechanical erosion.

Q8 | Surface defects that may be occurred during thermal machining are

micro cracking
heat affected zones
striations
all of the mentioned

Answer: all of the mentioned

Explaination:
during thermal machining surfaces defects occur.

Q9 | Sources used in thermal machining are

ions
plasma
electrons
all of the mentioned

Answer: all of the mentioned

Explaination:
different sources are used to remove the materials accordingly.

Q10 | Vacuum is the machining medium for

lbm
wjm
ebm
none of the mentioned

Answer: lbm

Explaination:
vacuum is the medium for laser beam machining and ion beam machining.

Q11 | In chemical machining is material removal takes by?

chemical reaction
erosion
electron removal
none of the mentioned

Answer: chemical reaction

Explaination:
chemical machining removes material by chemical reactions.

Q12 | Which of the following is an example of hybrid machining?

ultrasonic machining
electron beam machining
ultrasonic assisted electrochemical machining
laser beam machining

Answer: ultrasonic assisted electrochemical machining

Explaination:
more than one phase is used to combine to form hybrid machining.

Q13 | What is the full form of WJM in advanced machining processes?

water jack manufacturing
water jet machining
water jet manufacturing
water jack manufacturing

Answer: water jet machining

Explaination:
the full form of wjm is water jet machining in advanced machining processes.

Q14 | What is the key element of water jet machining for material removal?

tool holder
work piece
water jet
power source

Answer: water jet

Explaination:
water jet is the one, which is used to cut the work piece and to remove material.

Q15 | What is the velocity of water jet stream in water jet machining?

100 m/sec
300 m/sec
700 m/sec
900 m/sec

Answer: 900 m/sec

Explaination:
velocity of water jet stream that is used in water jet machining is about 900 m/sec.

Q16 | Which of the following is not a part of machining system of Water jet machining?

transducer
accumulator
jet cutting nozzle
hydraulic pump

Answer: transducer

Explaination:
transducer is not a part of water jet machining and other components come under wjm

Q17 | What is the general power rating of the hydraulic pump, used in WJM?

10 kw
20 kw
30 kw
40 kw

Answer: 30 kw

Explaination:
the power rating of the motor of hydraulic pump, which is used in wjm is about 30 kw.

Q18 | Which of the following are the components of intensifier present in water jet machining system?

piston
plunger
limit switch
all of the mentioned

Answer: all of the mentioned

Explaination:
the above mentioned components are present in the intensifier of water jet machining.

Q19 | On which property of water, will the accumulator in Water jet machining rely on?

density
compressibility
viscosity
velocity

Answer: compressibility

Explaination:
accumulator relies on compressibility of water (12% at 3800bar), in order to maintain a uniform discharge pressure in wjm.

Q20 | What are the values of typical tube diameters in the machining system in WJM?

0.1 to 1 mm
1 to 6 mm
6 to 14 mm
14 to 25 mm

Answer: 6 to 14 mm

Explaination:
typical tube diameter values range between 6 to 14 mm.

Q21 | What is the expected life of the nozzles used in WJM?

10 hrs
20 hrs
100 hrs
200 hrs

Answer: 200 hrs

Explaination:
the life that is expected from the nozzle, which is a part of machining system, is 200 hrs.

Q22 | Which of the following does not damage the nozzle used in Water jet machining?

particles of dirt
mineral deposits
water
all of the mentioned

Answer: water

Explaination:
only dirt particles and mineral deposits are responsible for damage of nozzle.

Q23 | What are the uses of catcher in machining system of Water jet machining?

collecting dirt
collection of debris
reduce noise levels
all of the mentioned

Answer: all of the mentioned

Explaination:
catcher in wjm is used to collect the dirt, machined debris and reduce the noise levels.

Q24 | Distance between which components, is the stand-off distance?

nozzle-inlet and work piece top
nozzle-outlet and work piece-top
nozzle-inlet and work piece-bottom
nozzle-outlet and work piece-bottom

Answer: nozzle-outlet and work piece-top

Explaination:
stand-off distance is the distance between top of work piece and nozzle outlet.

Q25 | 10 – 0.30 mm.

0.1 – 1 mm
1 – 2 mm
2 – 6 mm
6 – 14 mm

Answer: 2 – 6 mm

Explaination:
stand-off distance value ranges between 2.5 – 6 mm in water jet machining.