TENSIOHOLDING TWOON G GE COUPLING A FLANG(A) 4 A D 2 (BD 1 B C 2 3...
4. Tensio
holding two
on
g
ge coupling
a
flang
(a) 4
A
D
2
(b
D
1
B C
2
3
b)
A
4
B C
1
3
1
2
(d
(c) 3
2
4
1
4
d)
3
ns. (a)
IES-6. An
centre is
he width o
In a cotte
nd its
of the cott
50 mm an
er joint, th
IES-7.
ter at the
is the
kN. What i
m. The load
thickness
ter is 60 k
is 12 mm
on the cott
d acting o
shearing s
stress deve
-2004]
eloped in t
[IES-
the cotter?
?
(b) 100 N
N/
2
( ) 75 N/
( ) 120 N/
(d) 50 N/
2
2
2
Design of Joint
S K Mondal’s
Chapter 1
=
=
×
=
Shear
stress
Load
60 10
3
50N / mm
2
×
×
×
2 Area
2 50 12
IES-8.
The spigot of a cotter joint has a diameter D and carries a slot for cotter.
The permissible crushing stress is x times the permissible tensile stress for
the material of spigot where x > 1. The joint carries an axial load P. Which
one of the following equations will give the diameter of the spigot?
[IES-2001]
=
+
D
=
2P
x 1
+
=
−
2 P x 1
P x 1
D 2
x
D
x
(a)
πσ
(b)
πσ
(c)
πσ
π σ
(d)
t
IES-8. Ans. (b)
IES-9.
Match List-l (Machine element) with List-II (Cause of failure) and select
the correct answer using the codes given below the lists: [IES-1998]
List-I
List-II
A.
Axle
1.
Shear
stress
B.
Cotter
2.
Tensile/compressive
stress
C. Connecting rod
3. Wear
D. Journal bearing
4. Bending stress
Code: A B C D A B C D
(a)
1 4 2 3 (b)
4 1 2 3
(c) 4 1 3 2 (d)
1 4 3 2
IES-9. Ans. (b)
•
In machinery, the general term “shaft” refers to a member, usually of circular
cross-section, which supports gears, sprockets, wheels, rotors, etc., and which is
subjected to torsion and to transverse or axial loads acting singly or in combination.
•
An “axle” is a non-rotating member that supports wheels, pulleys, and carries no
torque.
•
A “spindle” is a short shaft. Terms such as line-shaft, head-shaft, stub shaft,
transmission shaft, countershaft, and flexible shaft are names associated with
special usage.
IES-10.
The piston rod and the crosshead in a steam engine are usually connected
by means of
[IES-2003]
(a) Cotter joint (b) Knuckle joint
(c) Ball joint
(d) Universal joint
IES-10. Ans. (a)
IES-11.
A cotter joint is used when no relative motion is permitted between the
rods joined by the cotter. It is capable of transmitting
[IES-2002]
(a) Twisting moment
(b) an axial tensile as well as compressive load
(c) The bending moment
(d) only compressive axial load
IES-11. Ans. (b)
IES-12.
Match List I with List II and select the correct answer using the codes
given below the lists:
[IES-1995]
List I
List II
(Different types of detachable joints) (Specific use of these detachable joints)
A. Cotter joint
1. Tie rod of a wall crane
B. Knuckle joint
2. Suspension bridges
C. Suspension link joint
3. Diagonal stays in boiler
D. Turn buckle (adjustable joint)
4. Cross-head of a steam engine
Codes: A
B
C
D
A
B
C
D
(a)
4
2
3
1
(b)
4
3
2
1
sign o
of Join
nt
Des
Monda
S K M
al’s
er 1
Chapte
(d)
1
4
3
3
2
2
1
4
(c)
IES-12. A
Ans. (a)
List II and
st I with L
using the
d select th
Match Lis
he correct
t answer u
IES-13.
codes
s:
[IES-
-1993]
given belo
ow the list
(Type of jo
oint)
List I (
A. Cotter j
joint
le joint
B. Knuckl
C. Turn bu
uckle
D. Riveted
d joint
jointing me
List
II
(Mode of j
embers)
ount of flex
cts two rod