... vertical.
The speed of the plane is:
A. the same as the speed of sound
B. half the speed of sound
C. three-fifths the speed of sound
D. 0.866 times the speed of sound
E. twice the speed of sound
ans: ... certain vector in the xy plane has an x componentof 4 m and a y componentof 10 m. It is
then rotated in the xy plane so its x component is doubled. Its new y component is about:
A. 20 m
B. 7.2m
C. ... be headed?
A. 27
◦
EofN
B. 30
◦
EofN
C. 45
◦
EofN
D. 60
◦
EofN
E. depends on the width of the river
ans: B
47. Two projectiles are in flight at the same time. The acceleration of one relative to...
... list ofdesign disciplines e.g. ship design,
building design, process design, bridge design, clothing or fashion design and so
on.
Here we are concerned with machine design. We now define a machine ... end of this lesson, the students should have the knowledge of
ã Basic concept ofdesign in general.
ã Concept ofmachinedesign and their types.
ã Factors to be considered in machine design. ... Discuss ‘factor of safety ‘ in view of the reliability in machine design.
A.4: Reliability of a designed machine is concerned with the proper functioning
of the elements and the machine as a...
... that the state of stress
at a point can be given by six stress components only. It is important to
understand the implication of this state of stress at a point in the designof
machine elements ... and its limitations.
ã Designof members subjected to combined bending, torsion and axial loading.
ã Buckling of beams.
2.1.1 Introduction
Stresses are developed in machine elements due ... cast iron machine parts of cross-sections shown in figure-2.1.7.2 are
subjected to bending moments. Which of the two sections can carry a
higher moment and determine the magnitude of the applied...
... coupling
Design details of such couplings will be discussed in the next lesson. The
main features of the design are essentially
(a) Designof bolts
(b) Designof hub
(c) Overall design and ... students should have the knowledge of
ã The function of couplings in machinery.
ã Different types of couplings: rigid and flexible couplings.
ã Types of rigid couplings such as sleeve, clamp, ... angular
misalignment
5.1.2.1.1.F- Types of misalignments in shafts
5.1.2.1.1 Sleeve coupling
One of the simple type of rigid coupling is a sleeve coupling which
consists of a cylindrical sleeve keyed...
... Modification of Soderberg diagram
ã Estimation of material properties for helical spring
ã Types of helical springs
ã Design considerations for buckling and surge.
7.2.1 Designof helical ... Spotts, DesignofMachine Elements, Prentice Hall India Pvt. Limited, 6
th
Edition, 1991.
Version 2 ME , IIT Kharagpur
Spring Nomenclature:
Let us select the type of spring ...
Inner diameter of spring, .
i
D32mm=
3
900 300
40N/mm 40 10 N/m
15
===ì
Spring rate,
k
Once the value of stiffness is known, then the value of number of active turns, N of
the spring...
... , Mechanical Engineering Design , McGraw Hill
Publication, 5
th
Edition. 1989.
2. M.F Spotts, DesignofMachine Elements, Prentice Hall India Pvt. Limited, 6
th
Edition, 1991.
3. Khurmi, ... and Gupta J.K., Text book on Machine Design, Eurasia
Publishing House, New Delhi.
4. Sharma, C.S. and Purohit Kamalesh, DesignofMachine Elements, Prentice
Hall of India, New Delhi, 2003.
... the limiting values of the angle of twist of a shaft?
Version 2 ME , IIT Kharagpur
G = shear modulus of elasticity
I
p
= Polar moment of inertia
The limiting value of θ varies from 0.3...
... the design procedure of a pressure vessel.
We consider a mild steel vessel of 1m diameter comprising a 2.5 m long
cylindrical section with hemispherical ends to sustain an internal pressure of ... thickness. Stresses in a
spherical shell are also discussed. Basic design principle of thin cylinders
are considered. Designof both welded and riveted joints for the shells are
discussed.
Version ... Considering the equilibrium of a cut out section the
circumferential stress σ
θ
and longitudinal stress σ
z
can be found. Consider a
section of thin cylinder of radius r, wall thickness t...