640+ Unconventional Machine Process (UMP) Solved MCQs

1.

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

A. complex shapes
B. high surface quality
C. low-rigidity structures
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: for above requirements this machining is used.
2.

Non-Traditional machining can also be called as                  

A. contact machining
B. non-contact machining
C. partial contact machining
D. half contact machining
Answer» B. non-contact machining
Explanation: tool and work piece are at a distance apart in this type of machining.
3.

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

A. automobile
B. aerospace
C. medical
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: non-traditional methods are used widely in many industries.
4.

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

A. mechanical
B. thermal
C. chemical and electro-chemical.
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: it can be classified into the above mentioned categories.
5.

In mechanical machining, material is removed by                        

A. erosion
B. corrosion
C. abrasion
D. vaporization
Answer» A. erosion
Explanation: abrasive grains remove material by mechanical erosion in usm.
6.

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

A. vaporization
B. melting
C. electro-plating
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: in this machining, heat is the source of energy.
7.

Which of the following process comes under mechanical machining?

A. usm
B. edm
C. lbm
D. pam
Answer» A. usm
Explanation: usm removes material by mechanical erosion.
8.

Surface defects that may be occurred during thermal machining are                  

A. micro cracking
B. heat affected zones
C. striations
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: during thermal machining surfaces defects occur.
9.

Sources used in thermal machining are                  

A. ions
B. plasma
C. electrons
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: different sources are used to remove the materials accordingly.
10.

Vacuum is the machining medium for                  

A. lbm
B. wjm
C. ebm
D. none of the mentioned
Answer» A. lbm
Explanation: vacuum is the medium for laser beam machining and ion beam machining.
11.

In chemical machining is material removal takes by?

A. chemical reaction
B. erosion
C. electron removal
D. none of the mentioned
Answer» A. chemical reaction
Explanation: chemical machining removes material by chemical reactions.
12.

Which of the following is an example of hybrid machining?

A. ultrasonic machining
B. electron beam machining
C. ultrasonic assisted electrochemical machining
D. laser beam machining
Answer» C. ultrasonic assisted electrochemical machining
Explanation: more than one phase is used to combine to form hybrid machining.
13.

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

A. water jack manufacturing
B. water jet machining
C. water jet manufacturing
D. water jack manufacturing
Answer» B. water jet machining
Explanation: the full form of wjm is water jet machining in advanced machining processes.
14.

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

A. tool holder
B. work piece
C. water jet
D. power source
Answer» C. water jet
Explanation: water jet is the one, which is used to cut the work piece and to remove material.
15.

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

A. 100 m/sec
B. 300 m/sec
C. 700 m/sec
D. 900 m/sec
Answer» D. 900 m/sec
Explanation: velocity of water jet stream that is used in water jet machining is about 900 m/sec.
16.

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

A. transducer
B. accumulator
C. jet cutting nozzle
D. hydraulic pump
Answer» A. transducer
Explanation: transducer is not a part of water jet machining and other components come under wjm
17.

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

A. 10 kw
B. 20 kw
C. 30 kw
D. 40 kw
Answer» C. 30 kw
Explanation: the power rating of the motor of hydraulic pump, which is used in wjm is about 30 kw.
18.

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

A. piston
B. plunger
C. limit switch
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: the above mentioned components are present in the intensifier of water jet machining.
19.

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

A. density
B. compressibility
C. viscosity
D. velocity
Answer» B. compressibility
Explanation: accumulator relies on compressibility of water (12% at 3800bar), in order to maintain a uniform discharge pressure in wjm.
20.

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

A. 0.1 to 1 mm
B. 1 to 6 mm
C. 6 to 14 mm
D. 14 to 25 mm
Answer» C. 6 to 14 mm
Explanation: typical tube diameter values range between 6 to 14 mm.
21.

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

A. 10 hrs
B. 20 hrs
C. 100 hrs
D. 200 hrs
Answer» D. 200 hrs
Explanation: the life that is expected from the nozzle, which is a part of machining system, is 200 hrs.
22.

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

A. particles of dirt
B. mineral deposits
C. water
D. all of the mentioned
Answer» C. water
Explanation: only dirt particles and mineral deposits are responsible for damage of nozzle.
23.

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

A. collecting dirt
B. collection of debris
C. reduce noise levels
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: catcher in wjm is used to collect the dirt, machined debris and reduce the noise levels.
24.

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

A. nozzle-inlet and work piece top
B. nozzle-outlet and work piece-top
C. nozzle-inlet and work piece-bottom
D. nozzle-outlet and work piece-bottom
Answer» B. nozzle-outlet and work piece-top
Explanation: stand-off distance is the distance between top of work piece and nozzle outlet.
25.

10 – 0.30 mm.

A. 0.1 – 1 mm
B. 1 – 2 mm
C. 2 – 6 mm
D. 6 – 14 mm
Answer» C. 2 – 6 mm
Explanation: stand-off distance value ranges between 2.5 – 6 mm in water jet machining.
26.

8 – 25 mm.

A. 0.0001 – 0.025 m/min
B. 0.05 – 0.25 m/min
C. 0.5 – 200 m/min
D. 200 – 500 m/min
Answer» C. 0.5 – 200 m/min
Explanation: in water jet machining, value of the feed rate ranges between 0.5 – 200 m/min.
27.

In WJM, what are the properties of jet fluid that affect the MRR?

A. velocity
B. flow rate
C. viscosity
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: all the mentioned properties above, of jet fluid affect the mrr in water jet machining.
28.

Which of the following property/ies of nozzle does not affect the material removal rate in Water jet machining?

A. material
B. diameter
C. outside temperature
D. stand-off distance
Answer» C. outside temperature
Explanation: in the nozzle, outside temperature has no effect on the rate of material removal.
29.

In the following materials, Water jet machining can be used on which type of material?

A. metals
B. plastics
C. ceramics
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: wjm can be used on metals, cloth, paper, plastics, food, leather, and ceramics.
30.

What are the processes and applications, where Water jet machining can be used?

A. cutting
B. drilling
C. deburring
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: water jet machining can be used for drilling, cutting, deburring, surface treatment and many more applications.
31.

What is the tolerance limit range of thin materials in WJM?

A. ± 0.1 mm
B. ± 10 mm
C. ± 25 mm
D. ± 50 mm
Answer» C. ± 25 mm
Explanation: in water jet machining, the range of tolerance is ± 25 mm.
32.

In cutting of rocks using water jet machining, which type of pressure is needed?

A. low pressure
B. medium pressure
C. high pressure
D. none of the mentioned
Answer» C. high pressure
Explanation: in wjm, very high pressures and velocities are needed while cutting rocks.
33.

In deburring, which combination removes the material from non-metallic materials?

A. high pressure and low flow rate
B. high pressure and high flow rate
C. low pressure and low flow rate
D. low pressure and high flow rate
Answer» A. high pressure and low flow rate
Explanation: for non-metallic materials high pressure and lower flow rates are used in deburring.
34.

Which of the following materials has some drawbacks of cutting WJM?

A. food
B. rocks
C. fibre-reinforced plastics
D. none of the mentioned
Answer» C. fibre-reinforced plastics
Explanation: water gets deflected due to the fibre embedded in the matrix of fibre- reinforced plastics when we use wjm.
35.

In WJM, surface treatment includes which type of processes?

A. removing deposits
B. removing chemicals
C. degreasing
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: surface treatment is done using wjm to clean the surface from many toxic chemical, deposits, residues etc
36.

In how many directions, can the cutting takes place in Water jet machining?

A. uni-directional
B. bi-directional
C. multi-directional
D. none of the mentioned
Answer» C. multi-directional
Explanation: water jet machining has multi directional cutting capacity i.e.., in any direction in three dimensional space.
37.

In Water jet machining, cuts can be started at which place of workpiece?

A. from left
B. from right
C. from middle
D. from any point
Answer» D. from any point
Explanation: in wjm, cuts can be started from any point on the workpiece.
38.

Which of the following is not an advantage of Water jet machining?

A. burr produced is minimal
B. no heat is produced
C. relatively low hourly rates
D. environmentally safe
Answer» C. relatively low hourly rates
Explanation: costs per hour are relatively high in water jet machining.
39.

In Water jet machining, tool need not require sharpening once the machining is done.

A. true
B. false
Answer» A. true
Explanation: tool does not wear in water jet machining, so it need not be sharpened.
40.

Which of the following secondary processes are eliminated in Water jet machining?

A. grinding of surface
B. surface treatment
C. polishing of surface
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: all the mentioned secondary processes above, are eliminated in water jet machining.
41.

How many parts are cut using Water jet machining, on a single blank?

A. one part
B. two parts
C. three parts
D. multiple parts
Answer» D. multiple parts
Explanation: depending up on the kerf width, multiple parts can be machined using a single blank.
42.

Which of the following is the disadvantage of water jet machining?

A. narrow kerf width
B. small diameter of nozzle
C. not suitable for mass production
D. burr is minimal
Answer» C. not suitable for mass production
Explanation: due to high maintenance, wjm cannot be used for mass production.
43.

. In advanced machining processes, what is the full form of AJM?

A. automatic jet manufacturing
B. abrasive jet machining
C. automated jet machining
D. abrasive jet manufacturing
Answer» B. abrasive jet machining
Explanation: in advanced machining processes, full form of ajm is abrasive jet machining.
44.

In AJM, which of the following materials are used as abrasive grains?

A. al2o3
B. sic
C. glass beads
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: in abrasive jet machining, any of the particles mentioned above can be used as abrasive grains.
45.

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
Answer» C. mechanical abrasion
Explanation: abrasive particles hit the surface with high pressure and high velocities, which removes the material.
46.

Which type of materials can be machined using Abrasive jet machining?

A. glass
B. ceramics
C. hard materials
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: materials like ceramics, glass, hard and super hard materials can be machined using abrasive jet machining.
47.

In machining system of AJM, which is the medium of carrying the abrasive grains for machining?

A. liquids
B. gases
C. any fluids
D. none of the mentioned
Answer» B. gases
Explanation: in ajm, different types of gases are used as the medium for carrying abrasives.
48.

In machining system of AJM, what is/are the gas/es used for carrying the abrasives?

A. co2
B. air
C. nitrogen
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: in ajm, gases like co2, air or nitrogen are used to carry the abrasives.
49.

What is the pressure of gas that is to be supplied, for carrying the abrasives?

A. 0.1 to 1.0 kg/cm2
B. 2.0 to 8.0 kg /cm2
C. 10.0 to 18.0 kg/cm2
D. 25.0 to 35.5 kg/cm2
Answer» B. 2.0 to 8.0 kg /cm2
Explanation: the pressure of the carrying gas should range between 2 to 8 kg/cm2.
50.

Which of the following gas, should never be used as the carrier of abrasives?

A. nitrogen
B. co2
C. oxygen
D. air
Answer» C. oxygen
Explanation: oxygen should not be used as carrier because it causes a violent chemical reaction with abrasives or work piece.
51.

What is the frequency of mixing chamber, consisting of gas and abrasives?

A. 10 hz
B. 30 hz
C. 50 hz
D. 70 hz
Answer» C. 50 hz
Explanation: mixing chamber consisting of carrier gas and the abrasive grains, vibrates at a frequency of 50 hz.
52.

What are the processes where Abrasive jet machining can be used?

A. cleaning
B. cutting
C. deburring
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: abrasive jet machining can be used for deburring, cutting, cleaning and for many other heavy duty applications.
53.

In machining system of AJM, which of the following controls the relative motion between work piece and nozzle?

A. cam drives
B. pantographs
C. trace mechanisms
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: relative motion in abrasive jet machining can be controlled by the above mentioned means.
54.

Masks, which are used to confine the jet stream location on work piece are made of, which type of materials?

A. copper
B. glass
C. rubber
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: masks can be made of any of the above-mentioned materials.
55.

In AJM, what is the mechanism of removal of material from the work piece?

A. corrosion
B. abrasion
C. electron transfer
D. vaporization
Answer» B. abrasion
Explanation: in abrasive jet machining, the removal of material takes places by mechanical abrasion, using abrasive grains.
56.

In AJM, abrasive jet from the nozzle follows, which type of path for a short distance?

A. parallel
B. inclined
C. perpendicular
D. none of the mentioned
Answer» A. parallel
Explanation: abrasive particles follow a parallel path for short distance and then flare outward.
57.

Which of the following components, influence the material removal rate in Abrasive jet machining?

A. nozzle
B. carrier gas
C. abrasive grains
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: all the components mentioned above, influence the rate of material removal, directly or indirectly.
58.

In the following properties of nozzle, which of them does not influence the MRR?

A. size
B. wear
C. outside temperature
D. distance from work piece
Answer» C. outside temperature
Explanation: the outside temperature of nozzle has no influence on the material removal rate.
59.

In the following properties of abrasive grains, which of them changes rate of material removal?

A. size
B. strength
C. shape
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: the above mentioned properties of abrasive grains influence the material removal rate.
60.

As the abrasive flow rate increases, what happens to the volumetric removal rate?

A. increases
B. decreases
C. increase and then decrease
D. decrease and then increase
Answer» C. increase and then decrease
Explanation: in ajm, volumetric removal rate increases up to a level and then decreases.
61.

What is the value of abrasive grain flow rate in Abrasive jet machining?

A. 0.1 – 2 g/min
B. 3 – 20 g/min
C. 30 – 56 g/min
D. 68 – 85 g/min
Answer» B. 3 – 20 g/min
Explanation: abrasive grain flow rate is between 3 – 20 g/min, in ajm.
62.

What is the value of carrier gas flow rate in Abrasive jet machining?

A. 6 l/min
B. 17 l/min
C. 28 l/min
D. 39 l/min
Answer» C. 28 l/min
Explanation: in abrasive jet machining, the flow rate of abrasive carrier gas is around 28 l/min.
63.

Which of the following material/s cannot be used for making of nozzle in Abrasive jet machining?

A. tungsten carbide
B. steel alloy
C. sapphire
D. synthetic sapphire
Answer» B. steel alloy
Explanation: nozzle in abrasive jet machining is made up of sapphire or wc.
64.

What is the life of Tungsten carbide material nozzle?

A. 1 – 8 hrs
B. 2 – 5 hrs
C. 10 – 15 hrs
D. 25 – 40 hrs
Answer» C. 10 – 15 hrs
Explanation: nozzle made up of wc material has a life period which range between 10 – 15 hrs.
65.

In AJM, what is the life of synthetic sapphire material nozzle?

A. 100 hrs
B. 300 hrs
C. 500 hrs
D. 700 hrs
Answer» B. 300 hrs
Explanation: nozzle made up of synthetic sapphire material has a life period which is about 300 hrs.
66.

05 mm.

A. 0.01 – 0.10 µm
B. 0.15 – 1.5 µm
C. 2.0 – 5.0 µm
D. 7.0 – 10.0 µm
Answer» B. 0.15 – 1.5 µm
Explanation: surface roughness value in ajm varies between 0.15 – 1.5 µm, depending on grain size.
67.

Which of the following, are the processes and applications in which Abrasive jet machining can be applied?

A. drilling
B. cutting
C. deburring
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: abrasive jet machining can be used for cutting, drilling, deburring and cleaning processes.
68.

Using abrasive jet machining, wire cleaning and insulation stripping take place without affecting the conductor.

A. true
B. false
Answer» A. true
Explanation: without affecting the conductor, both stripping and cleaning are done, by using abrasive jet machining.
69.

In Abrasive jet machining, intricate shapes and holes are machined on which type of materials?

A. brittle
B. thin
C. difficult to machine
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: abrasive jet machining is used to machine, intricate shapes and holes in brittle, thin and difficult to machine materials.
70.

State whether the following statement is true or false, about Abrasive jet machining. “Using Abrasive jet machining, micro deburring of hypodermic needles can take place.”

A. true
B. false
Answer» A. true
Explanation: abrasive jet machining can be used for micro deburring of hypodermic needles.
71.

What are the type of materials that can be machined using Abrasive jet machining?

A. glass
B. sapphire
C. quartz
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: in abrasive jet machining, the above mentioned materials can be machined, which are heat sensitive and brittle.
72.

What is the amount of material utilizes when we machine parts using Abrasive jet machining?

A. very low
B. low
C. medium
D. high
Answer» D. high
Explanation: in abrasive jet machining, material utilization is very high since it removes material by using abrasives.
73.

After how much time tool has to be changed in AJM?

A. 1 hr
B. 2 hrs
C. 5 hrs
D. no tool change required
Answer» D. no tool change required
Explanation: in abrasive jet machining, tool changes are not required.
74.

By using Abrasive jet machining, how much amount of hardening does the materials experience?

A. no hardening
B. very less hardening
C. average hardening
D. high hardening
Answer» A. no hardening
Explanation: in abrasive jet machining, hardening is not experienced by the machined materials.
75.

Which type of materials cannot be machined using Abrasive jet machining?

A. soft materials
B. hard materials
C. difficult to machine materials
D. none of the mentioned
Answer» A. soft materials
Explanation: soft materials such as candy bars, thin softwood etc.., cannot be machined using ajm.
76.

Which of the following materials in Abrasive jet machining can be a health hazard?

A. abrasive grains
B. air carrier
C. silica dust
D. none of the mentioned
Answer» C. silica dust
Explanation: silica dust, that occurs after machining can be a health hazard in ajm.
77.

In AJM, air filters are used to remove which of the following?

A. moisture
B. oil
C. other dust particles
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: before machining, air has to be filtered to remove dust, moisture and oil in the machining system.
78.

In advanced machining processes, what is the full form of AWJM?

A. automated water jet machining
B. automated water jet manufacturing
C. abrasive water jet machining
D. abrasive water jet manufacturing
Answer» C. abrasive water jet machining
Explanation: full form of awjm is abrasive water jet machining.
79.

What are all the types of materials, which can be machined using AWJM?

A. glass
B. ceramics
C. concrete
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: hard to cut materials, which are mentioned above, can be machined using abrasive water jet machining.
80.

When compared to the conventional machining, how much times faster, is the Abrasive water jet machining?

A. 5 times
B. 10 times
C. 15 times
D. 20 times
Answer» B. 10 times
Explanation: abrasive water jet machining is 10 times faster than the conventional machining.
81.

What is the percentage of the abrasives and water in the mixture?

A. 20% water and 80% abrasives
B. 80% water and 20% abrasives
C. 30% water and 70% abrasives
D. 70% water and 30% abrasives
Answer» D. 70% water and 30% abrasives
Explanation: abrasive mixture consists of 70 percent water and 30 percent abrasives.
82.

What are the materials used for abrasives in Abrasive water jet machining?

A. sic
B. corundum
C. glass beads
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: all of the materials mentioned above can be used for making abrasives in abrasive water jet machining.
83.

In the machining system of AWJM, which one accelerates the abrasives to remove material?

A. water only
B. water jet stream
C. feeder
D. none of the mentioned
Answer» B. water jet stream
Explanation: water jet stream accelerates abrasives but not the water only, to remove material.
84.

The introduction of compressed air to the water jet enhances the deburring action.

A. true
B. false
Answer» A. true
Explanation: compressed air increases the pressure energy of the jet stream, which enhances the material removal rate.
85.

What is the grain size of abrasive particles, which are often used for Abrasive water jet machining?

A. 0.01 – 0.50 µm
B. 10 – 150 µm
C. 200 – 500 µm
D. 500 – 1000 µm
Answer» B. 10 – 150 µm
Explanation: grain size of the abrasive particles range between 10 – 150 µm in abrasive water jet machining.
86.

How is the material removed in Abrasive water jet machining?

A. vaporization
B. electron transfer
C. corrosion
D. erosion
Answer» D. erosion
Explanation: in abrasive water jet machining, material removal takes place by the erosion of the work piece material using abrasives accelerated by jet stream.
87.

Which of the following is not the feed mechanism of the abrasives in AWJM?

A. side feed
B. cross feed
C. central feed
D. all of the mentioned
Answer» B. cross feed
Explanation: only side feed and central feed are used in abrasive water jet machining.
88.

In Abrasive water jet machining, how are the abrasives fed into the water jet stream?

A. suspension
B. injection
C. all of the mentioned
D. none of the mentioned
Answer» C. all of the mentioned
Explanation: abrasives are fed into the water jet stream through suspension or injection.
89.

What is the use of delivery system in the machining system of AWJM?

A. to deliver colloidal solution
B. to pump water
C. to fed abrasives
D. none of the mentioned
Answer» B. to pump water
Explanation: in abrasive water jet machining, water delivery system is used.
90.

Of the following components, which one does not come under the machining system of AWJM?

A. water delivery system
B. transducer
C. cutting nozzles
D. mixing chambers
Answer» B. transducer
Explanation: transducer is the component which does not come under the machining system of awjm.
91.

In Abrasive water jet machining, intensifier is used to deliver which type of pressure?

A. very low pressure
B. low pressure
C. medium pressure
D. high pressure
Answer» D. high pressure
Explanation: in awjm, intensifier is used to deliver high pressure water using pistons with it.
92.

In mixing chamber of AWJM, which of the following are mixed?

A. abrasives and colloidal solution
B. abrasives and water jet
C. colloidal and water jet
D. none of the mentioned
Answer» B. abrasives and water jet
Explanation: in mixing chamber, abrasives and water jet stream are mixed.
93.

Of the following, which one is a type of suspension in AWJM?

A. direct pumping
B. indirect pumping
C. bypass pumping
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: there are three different types of suspension awj formed by indirect, direct and bypass pumping.
94.

In machining system of AWJM, mixing chamber is immediately followed by which of the following component?

A. focusing tube
B. cutting nozzle
C. intensifier
D. water delivery
Answer» A. focusing tube
Explanation: in abrasive water jet machining, mixing chamber is immediately followed by the focusing tube.
95.

Which of the following energies are absorbed using the catchers in Abrasive water jet machining?

A. pressure energy
B. kinetic energy of abrasives
C. residual energy
D. all of the mentioned
Answer» C. residual energy
Explanation: in awjm, catchers are used to absorb the residual energy.
96.

Which of the following are different types of catchers used in AWJM?

A. water basin type
B. submerged steel balls type
C. tib2 type
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: the above mentioned types are the types of catchers used in awjm.
97.

Which of the following is not a process parameter of Abrasive water jet machining?

A. frequency of vibration
B. orifice diameter
C. pressure
D. stand-off distance
Answer» A. frequency of vibration
Explanation: frequency of the vibrations does not belong to the parameters of abrasive water jet machining.
98.

Which of the following come under the process parameters of the Abrasive water jet machining?

A. abrasive size
B. machine impact angle
C. traverse speed
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: all the parameters mentioned above come under abrasive water jet machining
99.

10 – 0.30 mm.

A. 1000 – 1500 bar
B. 1500 – 2500 bar
C. 2500 – 4000 bar
D. 4000 – 10000 bar
Answer» C. 2500 – 4000 bar
Explanation: in abrasive water jet machining, pressure value will range between 2500 – 4000 bar.
100.

Surface roughness depends on which of the following parameters in Abrasive water jet machining?

A. work piece material
B. grit size
C. abrasive type
D. all of the mentioned
Answer» D. all of the mentioned
Explanation: all the parameters mentioned above, are responsible for variation in surface roughness.
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