550+ Machining-and-machine-tool-operations Questions

Machining-and-machine-tool-operations Questions Set 21:

Quiz Mode

What is the typical angle between lathe centers?

45°

40°

60°

90°

Solution:

The movement of the number of levers that affect the gear changing is: (write Single-digit answer In the Answer box)

Solution:

What work can a CNC machining centre perform?

None of the above

Drilling work only

Milling work only

Both drilling and milling work

Solution:

During ultrasonic machining (USM), which of the following vibrates at ultrasonic frequency?

Slurry mix

Workpiece

Tool

Abrasive particles only

Solution:

What rake angles are typically given to carbide and ceramic cutting tool materials?

0 degrees

Positive rake angle

Negative rake angle

Any angle

Solution:

How does a push broach compare to a pull broach?

has less number of teeth

is short and stocky

removes less material for each pass of the tool

all of the above

Solution:

Which effect is responsible for generating waves in ultrasonic machining?

Electromagnetic effect

Photoelectric effect

Magnetostrictive effect

None of the above

Solution:

In electrochemical grinding (ECG), the grinding action removes ____________

workpiece material from the surface

oxide film formed on the surface

particles removed from surface after chemical action

corroded surface layer making workpiece ready for electrochemical process

Solution:

Following data correspond to an orthogonal Turning of a 100 mm diameter rod on a lathe. Rake angle: +15°; Uncut chip thickness 0.5 mm, nominal chip thickness after the cut 1.25 mm. The shear angle (in degrees) for this process is _________(correct to two decimal places0 .

Solution:

Through holes of 10 mm diameter are to be drilled in a steel plate of 20 mm thickness. The drill spindle speed is 300 rpm, the feed is 0.2 mm/rev, and the drill point angle is 120°. Assuming a drill over-travel of 2 mm, the time required to produce a single hole will be:

4 seconds

25 seconds

100 seconds

110 seconds

Machining-and-machine-tool-operations Questions Set 21:

What is the typical angle between lathe centers?

Solution:

The movement of the number of levers that affect the gear changing is: (write Single-digit answer In the Answer box)

Solution:

What work can a CNC machining centre perform?

Solution:

During ultrasonic machining (USM), which of the following vibrates at ultrasonic frequency?

Solution:

What rake angles are typically given to carbide and ceramic cutting tool materials?

Solution:

How does a push broach compare to a pull broach?

Solution:

Which effect is responsible for generating waves in ultrasonic machining?

Solution:

In electrochemical grinding (ECG), the grinding action removes ____________

Solution:

Following data correspond to an orthogonal Turning of a 100 mm diameter rod on a lathe. Rake angle: +15°; Uncut chip thickness 0.5 mm, nominal chip thickness after the cut 1.25 mm. The shear angle (in degrees) for this process is _________(correct to two decimal places0 .

Solution:

Through holes of 10 mm diameter are to be drilled in a steel plate of 20 mm thickness. The drill spindle speed is 300 rpm, the feed is 0.2 mm/rev, and the drill point angle is 120°. Assuming a drill over-travel of 2 mm, the time required to produce a single hole will be:

Solution:

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