CUTTING TOOLS AND OPERATIONS MCQ PART-5 FOR SEM 1

1) Which one the following features, refers to vitrified bond wheels?

Suitable for wet and dry grinding

Used for a longer period due to the dense structure

Not sensitive to shocks and pressure

Used for a longer period due to an elastic structure

2) Dressing and truing of a grinding wheel are...

exactly the same operation

done with the same equipment

done only for coarse grinding wheels

only for form grinding wheels

3) A hardened die block (work) has to be ground. It is required to retain the same hardness even after grinding. If the work is overheated in the grinding process, it may result in work being rejected or scrapped. The probable reason for rejection is that the work surface is ........

softened

discolored

rough

brittle

4) Which one of the following machine reamers are used to correct the misalignment between the reamer axis and the work axis?

Machine jig reamer

Shell reamer

Chucking Reamer

Floating blade reamer

5) You have to select a grinding wheel with suitable abrasive to grind glass. What is the type of abrasive you will select?

Emery

Diamond

Quartz

Silicon carbide

6) Which one of the following cutting fluids are used during grinding mild steel?

Non-synthetic cutting oil

Soluble oil

Paraffin

Mineral oil

7) Grinding with a balanced grinding wheel will make it possible to achieve the required ..........

Pattern of lay

Positional tolerance surface finish only

dimensional accuracy with the surface finish

Positional tolerance

8) Counter-boring is done for .........

Enlarging the hole to accurate size

deburring hole ends

Accommodating socket head screws

Finishing the cored hole

9) Oil grooves are to be cut in brass half bearings. Which one of the following chisels is suitable?

Half-round nose chisel

Flat Chisel

Crosscut chisel

Web chisel

10) After threading a hole by a tap, it was found that the crest of the thread was not formed throughout. Which one of the following reasons would have caused this defect?

Insufficient coolant supply

Broken the tip of cutting edge of the tap

Hole size slightly less than the tap drill size

Hole size slightly more than the tap drill size

11) Which is the possible cause when a twist drill produces a rough hole on the job?

The clearance angle is too small

Feed rate is too high

The clearance angle is too big

The cutting speed is too small

12) Which angle of countersink drill you will select for seating countersink type A (IS — 3406-1986)?

Countersink drill 75°

Countersink drill 80°

Countersink drill 90°

Countersink drill 120°

13) What will be the result if the clearance angle in the drill is increased?

Poor wedging action.

Weak cutting edge

Rough hole surface

Increased point angle

14) A reamed hole has patches of the poor finish. Which one of the following is the cause for this defect?

Excessive cutting speed

Wrong selection of the reamer for the job

The bored hole has an insufficient reaming allowance

Insufficient coolant supply