Free Printable Machinist Grinder 3rd Sem Module 4 : Cylindrical grinding

1.

Which part in cylindrical grinding machine moves longitudinal traverse to the work piece?

a)

Head stock

b)

Table reversing lever

c)

Upper table

d)

Lower table

2.

Which drive is used to rotate the grinding wheel mounted on a spindle in grinding machine?

a)

Chain drive

b)

Belt drive

c)

Rope drive

d)

Gear drive

3.

Which part in cylindrical grinding machine absorb vibrations and resist deflections?

a)

Table

b)

Base

c)

Wheel head

d)

Head stock

4.

Which machine produce very accurate and extremely fine finish on jobs?

a)

Lathe

b)

Milling machine

c)

Shaping machine

d)

Grinding machine

5.

Which machine utilizes abrasive wheel revolving at high speed to cut material?

a)

Milling machine

b)

Slotting machine

c)

Grinding machine

d)

Planning machine

6.

What is the advantage of centreless grinding?

a)

Output rate is high

b)

Centre drilling necessary

c)

Highly skilled worker required

d)

More time for loading and unloading

7.

Which is important in plain cylindrical grinding machine?

a)

Speeding the work

b)

Revolving the work

c)

Holding the grinding wheel

d)

Speeding the wheel

8.

What is the specification of grinding wheel?

a)

Manufacturers symbol for abrasive

b)

Standard marking system of grinding wheel

c)

Manufactures own mark

d)

Straight cup grinding wheel

9.

What is the name of grinding wheel?

a)

Segmented wheel

b)

Mounted wheel

c)

Flaring cup wheel

d)

Recessed one side wheel

10.

What is the name of grinding wheel?

a)

Dish

b)

Tapered two sides

c)

Cylinder

d)

Straight

11.

What is the use of flaring cup grinding wheel?

a)

Sharpening drills

b)

Sharpening chisel

c)

Sharpening centre punch

d)

Sharpening milling cutters

12.

Which grinding wheel is used on pneumatic and electric grinder?

a)

Dish wheel

b)

Saucer wheel

c)

Mounted wheel

d)

Segmented wheel

13.

What ‘A’ denotes in the standard marking system of grinding wheel 32A46H8V?

a)

Grain size

b)

Type of bond

c)

Type of abrasive

d)

Grade

14.

Which abrasive is used for grinding high speed steel?

a)

Sand stone

b)

Diamond

c)

Silicon carbide

d)

Aluminium oxide

15.

What ‘46’ denotes in the standard marking system of a grinding wheel (A46K5V8)?

a)

Grade

b)

Structure

c)

Grain size

d)

Type of abrasive

16.

What ‘H’ denotes in the standard marking system of a grinding wheel (A60H5V8)?

a)

Grade

b)

Structure

c)

Grain size

d)

Type of abrasive

17.

What ‘5’ denotes in the standard marking system of a grinding wheel (A60H5V8)?

a)

Grade

b)

Structure

c)

Grain size

d)

Type of abrasive

18.

What ‘V’ denotes in the standard marking system of a grinding wheel (A46K5V8)?

a)

Grade

b)

Grain size

c)

Structure

d)

Type of bond

19.

What ‘8’ denotes in the standard marking system of a grinding wheel (A46H5V8)?

a)

Grade

b)

Grain size

c)

Type of bond

d)

Manufacturer’s code

20.

What type of surface is produced by internal cylindrical grinding?

a)

Flat

b)

Formed

c)

Irregular

d)

Round hole

21.

What is the formula to find out RPM of cylinderical grinding?

a)

$N=\frac{V\times1000}{\pi\times d}$

b)

$N=\frac{\pi\times d}{\ V\times1000}$

c)

$N=\frac{V\times d}{1000\times\pi}$

d)

$N=\frac{\pi\times d\times V}{1000}$

22.

Which types of grinding wheel is used for sharpening hand saws?

a)

Disc

b)

Flaring cup

c)

Saucer

d)

Straight cup

23.

What is the grinding operation?

a)

Eccentric grinding

b)

Face grinding

c)

Taper grinding

d)

Internal grinding

24.

Which method of grinding operation the work piece is rotated about its own axis between centres as it passes lengthwise across the face of a revolving grinding wheel?

a)

Surface grinding

b)

Pedestal grinding

c)

Cylindrical grinding

d)

Tool and Cutter grinding

25.

Which grinding process specially shaped wheels are used to grind gear teeth, threads, and splined shafts?

a)

Form grinding

b)

Surface grinding

c)

Internal cylindrical grinding

d)

External cylindrical grinding

26.

Calculate the spindle speed (RPM) if the diameter of the wheel is 300 mm (d) and the surface speed is 25 m / sec [V]?

a)

1259

b)

1459

c)

1529

d)

1590

27.

Find the surface speed of the grinding wheel if the diameter of the grinding wheel is 300 mm (d) and RPM of the spindle is 2000 (N)?

a)

31.4 m/sec

b)

35.6 m/sec

c)

37.5 m/sec

d)

38.7 m/sec

28.

What is the formula to find out the surface speed of grinding in meter /sec?

a)

$V=\frac{1000\times60}{\pi\times d\times N}$

b)

$V=\frac{\pi\times d\times N}{1000\times60}$

c)

$V=\frac{1000\times60\times N}{\pi\times d}$

d)

$V=\frac{1000\times\pi\times d}{60\times N}$

29.

What is the depth of cut used for roughing in cylindrical grinding?

a)

0.01 - 0.03 mm

b)

0.04 - 0.05 mm

c)

0.06 - 0.07 mm

d)

0.07 - 0.09 mm

30.

What is the depth of cut used for finishing in cylindrical grinding?

a)

0.005 - 0.009 mm

b)

0.0025 - 0.005 mm

c)

0.009 - 0.100 mm

d)

0.100 - 0.110 mm

31.

What is the depth of cut for automatic feed in each traverse of the table in cylindrical grinding?

a)

0.10 - 0.16 mm

b)

0.16 - 0.20 mm

c)

0.006 - 0.10 mm

d)

0.20 - 0.24 mm

32.

What grade of wheel is selected for grinding in hard material?

a)

Hard wheel

b)

Soft wheel

c)

Medium wheel

d)

Fine wheel

33.

What is the formula for calculating machining time in cylindrical grinding?

a)

T =L x i/f x nw

b)

f x n T = w/L x i

c)

L x n T = w/f x i

d)

T = L x f/i x nw

34.

What is the work speed for cast iron in surface grinding?

a)

10 - 12 m/min

b)

12 - 18 m/min

c)

8 - 14 m/min

d)

18 - 20 m/min

35.

What is the unit of normal work speed in precision grinding?

a)

Metres/Second

b)

Metres/Minute

c)

Centimetres/Minute

d)

Centimetres/Secon d

36.

What is the formula for R.P.M of grinding wheel in precision grinding?

a)

$n=\frac{V_{3\ }\times1000\times60}{\pi\times D}$

b)

$n=\frac{V_{3\ }\times1000}{\pi\times D}$

c)

$n=\frac{V_{3\ }\times1000\times60}{\pi}$

d)

$n=\frac{V_{3\ }\times1000\times60}{D}$

37.

What is the cutting speed for steel in internal grinding?

a)

25 m/s

b)

30 m/s

c)

8 m/s

d)

20 m/s

38.

What is the unit of cutting speed of grinding wheel in precision grinding?

a)

Metres/Minute

b)

Metres/Second

c)

Centimetres/Minute

d)

Centimetres/Secon d

39.

What grade of grinding wheel is selected for grinding in soft material?

a)

Hard wheel

b)

Soft wheel

c)

Fine wheel

d)

Medium wheel

40.

What is the wheel speed selected for soft wheel while grinding?

a)

High speed

b)

Slow speed

c)

Medium speed

d)

Normal speed

41.

What type of grinding wheel is required for high finish grinding?

a)

Fine grain and dense structure

b)

Coarse grain and open structure

c)

Fine grain and open structure

d)

Coarse grain and dense structure

42.

What type of grinding wheel is required for rough grinding?

a)

Fine grain and dense structure

b)

Fine grain and open structure

c)

Coarse grain and open structure

d)

Coarse grain and dense structure

43.

How would select the grinding wheels for grinding operation?

a)

Wheel shape and thickness

b)

Wheel shape and size

c)

Wheel shape and abrasive

d)

Wheel shape and bond

44.

What type of grinding wheel is selected for removing less stock material?

a)

Coarse grain open structured hard wheel

b)

Coarse grain dense structured soft wheel

c)

Fine grain dense structured soft wheel

d)

Fine grain open structured hard wheel

Machinist Grinder 3rd Sem Module 4 : Cylindrical grinding

Total questions: 44

Worksheet time: 23mins

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