Manufacturing Processes (3141908) MCQs

MCQs of Grinding Machines and Abrasives

Showing 21 to 30 out of 63 Questions
1 2 3 4 5 6
21.
A dense structure of a grinding wheel is used for
(a) hard materials
(b) brittle materials
(c) finishing cuts
(d) all of these
Answer:

Option (d)

22.
The actual feed-in centreless grinders are given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of the wheel)
(a) πd
(b) πd n
(c) πd n sin α
(d) πd n cos α
Answer:

Option (c)

23.
A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to
(a) wear of bond
(b) breaking of abrasive grains
(c) wear of abrasive grains
(d) cracks on grinding wheel
Answer:

Option (c)

24.
The grade of a grinding wheel depends upon
(a) the hardness of the material being ground
(b) speed of wheel and work
(c) condition of grinding machine
(d) all of these
Answer:

Option (d)

25.
The structure of a grinding wheel depends upon
(a) the hardness of the material being ground
(b) nature of the grinding operation
(c) finish required
(d) all of these
Answer:

Option (d)

26.
The process of changing the shape of the grinding wheel as it becomes worn due to breaking away of the abrasive and bond is called
(a) truing
(b) dressing
(c) facing
(d) clearing
Answer:

Option (a)

27.
The grinding of long, slender shafts or bars is usually done by
(a) in-feed grinding
(b) through-feed grinding
(c) end-feed grinding
(d) any one of these
Answer:

Option (b)

28.
In centreless grinding, workplace center will be
(a) above the line joining the two-wheel centers
(b) below the line joining the two-wheel centers
(c) on the line joining the two-wheel centers
(d) at the intersection of the line joining the wheel centers with the workplace plane
Answer:

Option (a)

29.
Soft materials can not be economically ground due to
(a) high temperature involved
(b) frequent wheel clogging
(c) rapid wheel wear
(d) low work piece stiffness
Answer:

Option (b)

30.
The grinding wheel speed (surface speed in m/min) usually varies from
(a) 500 to 1000
(b) 1000 to 1500
(c) 1500 to 2000
(d) 2000 to 2500
Answer:

Option (c)

Showing 21 to 30 out of 63 Questions
1 2 3 4 5 6