Limits, Fits & Tolerances
Objectives
At the end of this lecture, the students should
be able to understand:
Concept of limits and fits
Preferred numbers
Various production techniques
SYSTEM OF FITS AND TOLERANCES
Due to the inevitable inaccuracy of ma

MACH NUMBER and AIRSPEED vs ALTITUDE
MACH NUMBER is defined as a speed ratio, referenced to the speed of sound, i.e.
Velocity of Interest
(at the given atmospheric conditions)
MACH NUMBER '
Velocity of Sound
[1]
Since the temperature and density of air de

Introduction to Fluid Mechanics
Chapter 9
External Incompressible Viscous
Flow
1
Main Topics
The Boundary-Layer Concept
Boundary-Layer Thicknesses
Laminar Flat-Plate Boundary Layer: Exact Solution
Momentum Integral Equation
Use of the Momentum Equation fo

Fluid Mechanics (Physical Properties of Fluids)
Match the pairs.
Set A
(i)
1. density
Set B
A. N/m
2. surface tension
B. N/m 3
3. kinematic viscosity
C. kg/m 3
4. specific weight
D. m 2/s
(ii)
1. dynamic viscosity
2. capillary rise
3. kinematic viscosity

Fluid Mechanics (Pressure Distribution in Fluids)
Choose the correct answer:
1. The gravity at a location is 5 m/s 2. The density of fluid was 2000 kg/m 3. The pressure exerted by a column of 1 m
of the fluid will be
(a) 400 N/m2
(b) 10,000 N/m 2
(c) 2000

Fluid Mechanics (Pressure Distribution in Fluids)
l Fill in the blanks with increases, decreases, or remains constant.
1. The pressure in a fluid at rest _ with depth.
2. Along the free surface in a liquid, the pressure _
3. In a fluid at rest the pressur

Fluid Mechanics (Physical Properties of Fluids)
l Indicate whether the statements are correct or incorrect.
1. Density is the ratio of mass of unit volume of liquid to the mass of unit volume of water.
2. In the gas equation temperature should be used in

ASSIGNMENT # 3
Study the following topics from Text Book 2 (McCabe et al., 7th Ed. ! ):
Viscosities of gases and liquids (pp 50 52)
Reynolds number and transition from laminar to turbulent flow (pp 53 54)
Laminar and turbulent flow in boundary layer (PP 6

Effect of Temperature on Viscosity
a. Gases Analyses based on kinetic theory predict
empirical Sutherland correlation (Ref no 7 appendix A)
Pressure Effect?
From a plot of T3/2/ versusT, one obtains the slope, 1/b, and the
intercept, S/b. For air,
b. Liqu

Fundamentals of Metal Working
Processes
Practically all metals, which are not used in cast form are reduced
to some standard shapes for subsequent processing.
Manufacturing companies producing metals, supply metals in form
of ingots which are obtained b

Joining Processes 2
COOLING OF FUSION WELD
Three imp. effects intimately connected
with the cooling of a fusion weld are
1. Contraction
2. Residual stress
3. Metallurgical phase transformation
SOLIDIFICATION PATTERNS FOR GROOVE
WELDS
SOLID STATE WELDING
F

JOINING PROCESSES
JOINING PROCESSES
Are joining processes manufacturing
processes?
Classification of Joining Processes
According to the composition of the joint
According to the nature of the joint
According to the mechanism of bonding
Classification

Joining 3
Heat Source Intensity (Fusion Welding)
One distinguishing feature of all
fusion welding processes is the
intensity of the heat source used
to melt the liquid. Virtually every
concentrated heat source has
been applied to welding from
time to time

SWAGING, WIRE DRAWING &
BENDING
Swaging
In this process, the diameter of a rod or a tube is
reduced by forcing it into a confining die. A set of
reciprocation dies provides radial blows to cause the
metal to flow inward and acquire the form of the die
ca

Fundamentals of Metal Working
Processes
Practically all metals, which are not used in cast form are reduced
to some standard shapes for subsequent processing.
Manufacturing companies producing metals, supply metals in form
of ingots which are obtained b

Birla Institute of Technology and Science, Pilani
First Semester, 2013-14
CHE F212, Fluid Mechanics
Surprise Quiz 5(open Book) 25/09/13
15 min, 10 points
NAME: So W ‘ ID: Section:
Q1: A Newtonian ﬂuid is conﬁned between two broad parallel vertical
plates

Birla Institute of Technology and Science, Pilani
First Semester, 2015-16
CHE F212, Fluid Mechanics
Surprise Quiz 2(closed Book)
19/08/15
15 min, 5 points
NAME:
SOLUTION
ID:
Section:
-Consider the two-fluid manometer shown.
Calculate the applied pressure

Introduction to Fluid Mechanics
Chapter 10
Fluid Machinery
1
Main Topics
Introduction and Classification of Fluid
Machines
Turbomachinery Analysis
Pumps, Fans, and Blowers
Positive Displacement Pumps
Hydraulic Turbines
Propellers and Wind-Powered
Tu

Fluid Mechanics (Physical Properties of Fluids)
Indicate whether the statements are correct or incorrect.
1. Specific weight of a body will vary from place to place.
2. Mass is measured by a spring balance.
3. Specific weight is measured by a spring balan

Fluid Mechanics (Pressure Distribution in Fluids)
l Indicate whether the statements are correct or incorrect.
1. In a fluid at rest, the pressure at a point varies with direction.
2. In a fluid at rest the pressure at a constant level will be equal at all

Birla Institute of Technology and Science, Pilani
First Semester, 2014-15
CHE F212, Fluid Mechanics
Surprise Quiz 1(closed Book)
12/08/14
15 min, 10 points
NAME:
ID:
Section:
-A partitioned tank as shown contains H2O and Hg.
1. What is the gage pressure i

Chemical Engineering 374
Fluid Mechanics
Minor/Fitting Losses
A good scientist is a person with original ideas. A good engineer is a person who
makes a design that works with as few original ideas as possible. There are no prima
donnas in engineering.
-Fr

Chemical Engineering 374
Fluid Mechanics
Dimensional Analysis
1
Outline
2
Introduction and Motivation
Theory
Limitations
Experiments
Cost, practicality, efficiency
Qualitative understanding
Dimensionless groups
Eliminate the units
Methods
Govern

Birla Institute of Technology and Science, Pilani
First Semester, 2014-14
CHE F212, Fluid Mechanics
Quiz 3(Open Book)
09/09/14
15 min, 10 points
NAME:
ID:
Section:
Water flows steadily up the vertical 0.1 m diameter pipe and out the nozzle, which is 0.05

Birla Institute of Technology and Science, Pilani
First Semester, 2014-14
CHE F212, Fluid Mechanics
Quiz 4(Closed Book)
09/16/14
15 min, 10 points
NAME:
ID:
Section:
A hypodermic needle, with inside diameter d = 0.127 mm and length L = 25 mm is used to in

All problems except the followings
Chapter 2
45, 46, 48-52, 58, 63-65, 71
Chapter 3
After 50
Introduction to Fluid Mechanics
Chapter 4
Basic Equations in Integral Form
for a Control Volume
Main Topics
1.
2.
3.
4.
5.
6.
7.
8.
Basic Laws for a System
Relati

Introduction to Fluid Mechanics
Chapter 8
Internal Incompressible Viscous
Flow
1
Main Topics
Entrance Region
Fully Developed Laminar Flow
Between Infinite Parallel Plates
Fully Developed Laminar Flow in a Pipe
Turbulent Velocity Profiles in
Fully Deve

Birla Institute of Technology and Science, Pilani
First Semester, 2014-14
CHE F212, Fluid Mechanics
Quiz 2(Open Book)
26/08/14
15 min, 10 points
NAME:
ID:
Section:
A water jet pump has jet area 0.009 m2 and jet speed 30.5 m/s. The jet is within a secondar