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Non-Conventional Machining - Ultrasonic Machining

Total questions: 16

Worksheet time: 8mins

Name
Class
Date
1.

In non-conventional machining

a)

no contact between tool and workpiece

b)

material removal takes place in hardened workpiece also

c)

minimum burr is created

d)

complex shape can be machined

e)

All the above are true

2.

Ultrasonic machining is a ____________

a)

Conventional machining method

b)

Non-conventional machining method

c)

method used to machine soft materials

d)

All of the above

3.

Ultrasonic machining is suitable for machining

a)

Electrically conducting materials

b)

Electrically non-conducting materials

c)

Hard and brittle materials

d)

All the above

4.

Full form of USM is ____

a)

Ultrasound machining

b)

Ultrasonic machining

c)

Upper sonic machining

d)

Upper sound machining

5.

Ultrasonic machining is a kind of _________method

a)

grinding

b)

milling

c)

forming

d)

shaping

6.

Abrasive slurry is __________

a)

mixture of abrasives and hard particles

b)

mixture of abrasives and water

c)

abrasives and grinding dust

d)

All the above

7.

In USM the tool vibrates at ___________

a)

above ultrasonic frequency

b)

below ultrasonic frequency

c)

Both of the above

d)

None of the above

8.

In USM the frequency of the tool is in the range of _____

a)

19 - 25 kHz

b)

Less than 16 kHz

c)

10000 Hz

d)

None of the above

9.

Transducer is a device which converts ______________

a)

linear motion into rotary motion

b)

rotary motion into linear motion

c)

electrical energy into mechanical energy

d)

mechanical energy into electrical energy

10.

Piezo-electric effect is found on materials like

a)

ceramics

b)

quartz

c)

nickel and nickel alloys

d)

copper and its alloys

11.

Magneto-strictive effect is observed on materials like

a)

Nickel and its alloys

b)

Iron and steel

c)

hard and brittle materials

d)

all the above

12.

Piezo-electric effect is the property of

a)

change in length due to temperature

b)

change in length due to tensile force

c)

change in length subjected to strong electric current

d)

change in length due to strong magnetic field

13.

Magneto-strictive effect is the property of

a)

change in length due to temperature

b)

change in length due to tensile force

c)

change in length subjected to strong electric current

d)

change in length due to strong magnetic field

14.

Material used for making the tool in USM is/are

a)

Copper

b)

Brass

c)

Unhardened steel

d)

All the above

15.

Abrasive particles used in USM is/are

a)

Al2O3

b)

SiC

c)

B4C

d)

Diamond

e)

All the above

16.

Full form of MRR is

a)

Material Removal Rate

b)

Magnified Rapid Removal

c)

Material Removal Report

d)

Machining Removal Rate

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