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Quiz on AJM & USM

Total questions: 20

Worksheet time: 6mins

Name
Class
Date
1.

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

2.

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

3.

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

a)

Glass

b)

Ceramics

c)

Hard Materials

d)

All of the mentioned

4.

In the 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 above

5.

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

a)

Nitrogen

b)

CO2

c)

Oxygen

d)

Air

6.

In Abrasive jet machining, what may be the size of the abrasive grains used?

a)

10 – 50 µm

b)

50 – 100 µm

c)

100 – 150 µm

d)

200 – 300 µm

7.

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

a)

Size

b)

Wear

c)

Outside temperature

d)

Distance from workpiece

8.

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

a)

Increases

b)

Decreases

c)

Increase and then decrease

d)

Decrease and then increase

9.

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

10.

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

11.

WHat is the full form of USM in advance machining process.

a)

Ultrasound manufacturing

b)

Ultrasonic machining

c)

Ultrasonar machining

d)

UV Spectrum manufacturing

12.

Amplitude of oscillation of tool in USM ranges between

a)

10-20 μm

b)

100-200 μm

c)

25-100 μm

d)

150-200 μm

13.

Frequency of tool oscillation in USM ranges between

a)

15-30 KHz

b)

30-50 KHz

c)

50-80 KHz

d)

10-20 KHz

14.

USM process can be used for

a)

Conductors

b)

Insulators

c)

Metals

d)

All of the mentioned

15.

Component which is used to convert high frequency electrical impulse into mechanical vibration in USM is known as

a)

Tool

b)

Feeding unit

c)

Transducer

d)

None of the mentioned

16.

In USM cutting rate increases with grain size

a)

Yes

b)

No

17.

USM is recomended for the materials having hardness

a)

more than 50HRC

b)

less than 50HRC

c)

60HRC-70HRC

d)

70HRC-80HRC

18.

The size of the hole produced is not influenced by the grit size of the abrasive.

a)

True

b)

False

19.

(a)   size abrasive particles are used for rough surface finish.

20.

USM does not produce thermal, electrical and chemical abnormal surface

a)

True

b)

False