MCG 3131
MACHINE DESIGN
APRIL 2010
FINAL EXAMINATION
Open book.
1-
Calculators permitted. Attempt all questions. Time: 3hrs.
A rotating shaft is supported in vertical direction by a pair of ball bearings. Ball
bearings have a load rating of C10 = 5.07 kN

MCG 3131 - Assignment 6
Problem 1
A AISI 1020 as-rolled steel bar is cantilevered to support a static load of 300 lbf as
illustrated. The bar is secured to the support using two 12 in-13 UNC SAE 5 bolts. Find the
factor of safety for the following modes o

MCG 3131 - Assignment 1
Problem 1
Review your notes of previous years and determine the moment of inertia of the T section
shown in the figure (a) below, around the horizontal axis passing through its centroid.
Dimensions in millimeters. Show that the pro

MCG 3131 - Assignment 3
Problem 1
The figure below shows a shaft and the fluctuating nominal stress (i.e. in the center of the
50-mm section) to which it is subjected. The shaft is made of steel with S u = 600 MPa and
S y = 400 MPa. Estimate teh safety fa

MCG 3131 - Assignment 2
Problem 1
At a point in a structural member, the stresses are represented as in the figure below. Use
Mohrs circle to determine
(a) the magnitude and orientation of the principal stresses
(b) the magnitude and orientation of the ma

1- A single square-thread power screw has an input power of 3 kw at a speed of 1
rev/s. The screw has a major diameter of 36 mm and a pitch of 6 mm. The
frictional coefficients are 0.14 for the threads and 0.09 for the collar, with a
mean collar friction

Assignment 10, Due on Tuesday July 23
1- A helical spring is made of 1 mm diameter carbon steel wire. The outside diameter of
the spring is 14 mm. There are a total of 14 turns and the ends are squared.
a) Determine the stiffness (scale) of the spring.
b)

Assignment 2, Due on June 2013-06-27 in tutorial class
1- The beam is simply supported at points A and B and loaded with three
concentrated loads at points C, M and D as shown.
a) Find the shear force and bending moment distribution along the beam.
b) Det

Assignment 9- Due on July 18 2013
MCG 3131
1- In the following figure the bracket is welded to the base plate using 8 mm fillet weld with E70XX
electrode at three lines AD, DC and BC. Bracket and base plate are made from AISI 1020 hot rolled
steel. Neglec

MCG3131 Assignment 6 due on Tuesday July 9th
1- In the figure a shaft with basic diameter size of 35 mm is to be attached to a gear
through a 6 mm 8 mm Key (not a standard key).
a) The shaft and the gear are supposed to have a Sliding fit, determine the
l

Assignment 2
1- Find the state of stress in an element located 10 mm from the top of the beam at cross
section AB and find the maximum shear stress at that point. As shown the beam has a
cross section of 20 by 30 mm.
A
200 mm
20 mm
30 mm
y
B
1500 N
x
2- T

Assignment 4 - Due date: 2013-07-02
1-
In the figure shown the bars have a rectangular cross section of 10 5 mm. They
are made of AISI 1020 HR steel and are hinged at the ends (both bars are simply
supported at ends). Determine the maximum force F that th

Assignment 8. Due on July 16
MCG 3131
1- Two 20 mm by 80 mm, 1018 cold rolled steel plates are connected using two 10 mm by 80 mm
connecting plates of the same material. In one side of the connecting plates three M12 bolts of
property class 4.8 are used a

MCG 3131 - Assignment 4
A journal bearing is to be designed for a shaft that rotates at 1,200 rpm and applies a
4.45-kN load to the bearing with a unit load capacity P of 1.5 MPa. Proportions of L/D = 1
are desired. SAE 20 oil is to be used, and the avera

MCG 3131 - Assignment 3
Problem 1
The figure below shows a shaft and the fluctuating nominal stress (i.e. in the center of the
50-mm section) to which it is subjected. The shaft is made of steel with S u = 600 MPa and
S y = 400 MPa. Estimate teh safety fa

MCG 3131
MACHINE DESIGN
Feb 2010
MIDTERM EXAMINATION
Open book.
Calculators permitted. Attempt all questions. Time: 2hrs
1- In the following figure the beam is simply supported at the ends. The modulus of elasticity
for the material of the beam is E = 200

MCG 3131X
MACHINE DESIGN
June 2011
MID-TERM EXAMINATION
Open book.
Calculators permitted. Attempt all questions. Time: 2 hrs.
1- In the figure shown a shaft with basic diameter size of 35 mm is to be
attached to a gear through a 6 mm 8 mm Key (not a stand

MCG 3131
MACHINE DESIGN
July 2012
MID-TERM EXAMINATION
Open book.
Calculators permitted. Attempt all questions. Time: 1 hr 30 Min.
1- The beam is simply supported at points A and B and loaded with three
concentrated loads at points C, M and D as shown.
a)

MCG 3131
MACHINE DESIGN
June 2009
MIDTERM EXAMINATION
Open book.
Calculators permitted. Attempt all questions.
Time: 2hrs.
1- The rectangular beam shown is under the axial force Fx and shear forces Fy and Fz and
torsion load Tx as shown in the following f

MCG 3131X
MACHINE DESIGN
May 2010
MID-TERM EXAMINATION
Open book.
Calculators permitted. Attempt all questions. Time: 2 hrs, 15 Min.
1- A disk made of aluminum (E = 72 GPa, poisons ratio of = 0.33,
thermal expansion coefficient of = 23.9 10-6 /C, density

MCG 3131
MACHINE DESIGN
APRIL 2009
FINAL EXAMINATION
Open book.
Calculators permitted. Attempt all questions. Time: 3hrs.
1- In an assembly with the loading arrangement shown in the figure the pipe shape part is
kept in place using a in-16 UNF bolt. The t

MCG 3126
MACHINE DESIGN
May 2008
MIDTERM EXAMINATION
Open book.
Calculators permitted. Attempt all questions. Time: 2hrs, 15 min.
1- In the following figure the weight of the shaft is negligible, E = 200 GPa, d = 40 mm.
a) Determine the reactions at point

MCG 3131
MACHINE DESIGN
June 2011
FINAL EXAMINATION
Open book.
1-
Calculators permitted. Attempt all questions. Time: 3hrs.
Two 10 mm 120 mm steel bars are connected together using two 6 mm 120 mm
steel plates. They are connected using six M16 2 mm bolts

MCG 3131
MACHINE DESIGN
August 2012
FINAL EXAMINATION
Open book.
1-
Calculators permitted. Attempt all 5 questions. Time: 3hrs.
A single row 02 series deep groove ball bearing has a bore diameter of 40 mm with inner ring rotating.
The ball bearing has wor

MCG 3131
MACHINE DESIGN
Feb 2009
MIDTERM EXAMINATION
Open book.
Calculators permitted. Attempt all questions. Time: 2hrs, 15 min.
1- In the following figure the beam is simply supported at the ends and is made of SAE 1040
CD steel. The beam and its loadin

MCG 3131 - Assignment 4
A journal bearing is to be designed for a shaft that rotates at 1,200 rpm and applies a
4.45-kN load to the bearing with a unit load capacity P of 1.5 MPa. Proportions of L/D = 1
are desired. SAE 20 oil is to be used, and the avera

MCG 3131 - Assignment 2
Problem 1
At a point in a structural member, the stresses are represented as in the figure below. Use
Mohrs circle to determine
(a) the magnitude and orientation of the principal stresses
(b) the magnitude and orientation of the ma

MCG 3131 - Assignment 1
Problem 1
Review your notes of previous years and determine the moment of inertia of the T section
shown in the figure (a) below, around the horizontal axis passing through its centroid.
Dimensions in millimeters. Show that the pro