Worksheets5 sem press
Total questions: 55
Worksheet time: 18mins
Name
Class
Date
1.
Unit of young's modulus is ______
a)
undefined
b)
mm
c)
N
d)
Text for option 5
(optional)
2.
Volume and thickness in drawing ______
a)
Remain constant
b)
undefined
c)
Decreases
d)
Increases
3.
Formula of buckling force _____________
a)
undefined
b)
[π² × E × I]/Lp²
c)
πD^4 / 64
d)
[π² × E × I]/Lp
4.
_____ is a process of cold forming involving severe metal flow.
a)
undefined
b)
Embossing
c)
Coining
d)
Drawing
5.
In the equation, Fb=∏^2 x E x I/Lp^2 the term Lp refer to _______
a)
Length of the punch
b)
sheet metal width
c)
Buckling force
d)
undefined
6.
Modulus of Elasticity for steel varies from _____ GN/m2
a)
120 to 180
b)
undefined
c)
210 to 230
d)
200 to 220
7.
Unit of buckling force is ______
a)
mm^2
b)
N
c)
mm
d)
undefined
8.
Formula of moment of inertia of a circular section _______
a)
undefined
b)
a^2 /12
c)
a^4 /12
d)
πD^4 / 64
9.
Buckling of punches are subjected to______ stresses
a)
low-density
b)
Compression
c)
undefined
d)
tensile
10.
Formula of moment of inertia of a square cross section _______
a)
undefined
b)
a^2 /12
c)
a^4 /12
d)
πD^4 / 64
11.
In the equation, Fb=∏^2 x E x I/Lp^2 the term I refer to _______
a)
Buckling force
b)
Length of the punch
c)
Moment of inertia
d)
undefined
12.
____ is a process of cold forming involving severe metal flow.
a)
undefined
b)
Coining
c)
Embossing
d)
Drawing
13.
In the equation, Fb=∏^2 x E x I/Lp^2 the term E refer to _______
a)
undefined
b)
Length of the punch
c)
Moment of inertia
d)
sheet metal width
14.
Thin punches subjected to compression stress,cause the punches to fail due to__________
a)
undefined
b)
Breaking
c)
Buckling
d)
Cracking
15.
____ is a process of cold forming involving severe metal flow.
a)
Drawing
b)
Embossing
c)
Coining
d)
undefined
16.
The % reduction for cold rolled steel in 1st draw is
a)
0.4
b)
0.3
c)
undefined
d)
0.2
17.
In which of the following process the work piece is pulled through a die resulting in reduction of area?
a)
Forming tool
b)
drawing
c)
forging
d)
undefined
18.
The formula to calculate clearance for deep drawing steels is___________
a)
undefined
b)
s+(.0.07x√(10s))
c)
s+(.0.04x√(10s))
d)
s+(.0.02x√(10s))
19.
Too small clearance will result in _______ of the component
a)
low clamping
b)
folding
c)
tearing
d)
undefined
20.
Too large clearance will result in _______ of the component
a)
tearing
b)
wrinkling
c)
folding
21.
otal drawing force= X x Drawing force, where X is______________
a)
Blank holding factor
b)
undefined
c)
Blank holding pressure
d)
Blank holding force
22.
Blanking holder force = blank holder pressure X _______.
a)
clamping force
b)
blank holder area
c)
length of the area
d)
undefined
23.
Total drawing force= X x Drawing force, where X is______________
a)
Blank holding pressure
b)
Blank holding force
c)
undefined
d)
Blank holding factor
24.
Blanking holder force = blank holder pressure X _______.
a)
length of the area
b)
blank holder area
c)
clamping force
d)
undefined
25.
The blank holder uses about ______ of the capacity of the press
a)
two-third
b)
undefined
c)
one-forth
d)
one-third
26.
The blank holder pressure can be calculated from the _______
a)
pressure
b)
drowing
c)
undefined
d)
graph
27.
Degree of drawing is measured in terms of?
a)
Reduction in stress
b)
Reduction in force
c)
Reduction in area
d)
undefined
28.
If drawing ratio exceeds certain limit,the material fails due to ______ stresses.
a)
less
b)
same
c)
excessive
d)
undefined
29.
Drawing force can be calculated as percentage of_____ force.
a)
undefined
b)
shearing
c)
tensile
d)
press
30.
As a general rule the maximum reduction for most materials is__________
a)
0.5
b)
0.55
c)
0.4
d)
undefined
31.
If drawing ratio exceeds certain limit,the material fails due to ______ stresses.
a)
undefined
b)
less
c)
same
d)
excessive
32.
The % reduction for cold rolled steel in 1st draw is ______.
a)
0.2
b)
0.4
c)
undefined
d)
0.3
33.
_____ is a process of cold forming involving severe metal flow.
a)
Drawing
b)
Embossing
c)
Coining
d)
undefined
34.
In which of the following process the work piece is pulled through a die resulting in reduction of area?
a)
undefined
b)
Forming tool
c)
drawing
d)
forging
35.
____ is a process of cold forming involving severe metal flow.
a)
Drawing
b)
Embossing
c)
Coining
d)
undefined
36.
As a general rule the maximum reduction for most materials is__________
a)
0.2
b)
0.4
c)
undefined
d)
0.3
37.
If drawing ratio exceeds certain limit,the material fails due to ______ stresses.
a)
undefined
b)
excessive
c)
same
d)
less
38.
To prevent excessive thinning of the cup the punch nose radius is made ______time of the metal thickness.
a)
ndefined
b)
3 to 9s
c)
5 to 6s
d)
4 to 10s
39.
Drawing force can be calculated as percentage of_____ force.
a)
press
b)
undefined
c)
shearing
d)
tensile
40.
__ is provided to control the material flow.
a)
undefined
b)
grooving
c)
Draw beads
d)
clamping force
41.
A single draw bead is placed around the _____side.
a)
die core
b)
top plate
c)
bottom plare
d)
undefined
42.
Airvent is provided to eliminate _______ .
a)
oil
b)
air pockets
c)
flash
d)
undefined
43.
Roll coating in drawing is used for_______
a)
Lubricating
b)
Coating
c)
Impregnating
d)
undefined
44.
Lubricants containing oil and solid substances are used for ______
a)
Bending
b)
Curling
c)
Severe draws
d)
undefined
45.
______ occur at the edge of the blank.
a)
undefined
b)
wrinkles
c)
tearing
d)
puckers
46.
The ratio h/H of Tin is ______.
a)
undefined
b)
1.2
c)
1.5
d)
1.4
47.
The ratio h/H of low carbon Steel is ______.
a)
1.4
b)
1.3
c)
undefined
d)
1.5
48.
___ appear on only one part of the blank.
a)
tearing
b)
punch
c)
undefined
d)
puckers
49.
A part can be draw in one station to a depth of ______ time the corner radius.
a)
undefined
b)
3 to 4
c)
4 to 7
d)
5 to 7
50.
Square boxes can can be drawn to a depth of approximately ____ of the width.
a)
0.8
b)
0.7
c)
0.65
d)
undefined
51.
A line drawn with a long section, short dash, and another long section is a __________.
a)
Center of a circle
b)
Center axis of a hidden cylinder
c)
undefined
d)
Hidden feature
52.
In reverse drawing the lower die is mounted on the ______.
a)
ress bed
b)
top
c)
bottom
d)
undefined
53.
_____ is the method of redrawing the wall thickness and to improve the surface finish.
a)
shaving
b)
forming
c)
embossing
d)
undefined
54.
In ironing process E1 = _______
a)
t2-t3
b)
t0-t1
c)
undefined
d)
t1-t2
55.
In deep drawing of sheets the limiting draw ratio depends on __
a)
percentage of elongation of sheet metal
b)
undefined
c)
yield strength of sheet metal
d)
types of press used
100 %
