Key Steps in Solving Problems on Probability (1) Read the question very carefully, in particular, identify the following 2 major points: (a) (b) how the experiment (action) is carried out? what are the possible outcomes of the event? Note: For
1. Object: To investigate the performance of a vapour compression
refrigerator with varying condenser pressures and temperatures.
2. Introduction: Aim of the experiment was to measure the performance
of a vapour co
Methods of rivet failure:
Failure of a rivet by pure shear is given as:
Where A is the sectional area of all rivets in
Load carrying capacity of square key connection
A cast iron gear hub 75mm long transmits 1628Nm torque to a steel shaft of 50mm .if the
compressive shear strength of the hub material, S C = 965MN/m and for the shaft, the yield point
Syp = 586MN/m
Principle of energy conversion in a nuclear power plant
The source of energy in a nuclear power plant is the fission of the nuclear of unstable atoms e.g.
Uranium-235. Uranium exists as isotopes of U235, U234 and U238. Out of these isotopes, U235 is the
Definition - gasification is thermal process during which a carbonise substance reacts with either air
and/or steam to produce hot gaseous fuel (producer gas). In all of gasifiers therefore CO 2 and H2O
formed during combustion are re
Stages of charcoal formation
1.At 20 to 110C. The wood absorbs heat as it is dried giving off moisture as water vapour. The
temperature remains at or slightly above 100C until the wood is bone dry.
2.At 110 to 270C. Final traces of water a
THERMAL SOLAR TECHNOLOGY
The outer layer of the sun, called the photosphere, emits a continuous spectrum of radiation. Its
temperature is around 5000 oC and for the purpose of solar calculations, the photosphere is assumed
to be a black bod
Keys are used in parts assembly to prevent relative motion between the shaft and the element on
the shaft, i.e. gears, pulleys, sprocket, cam, levers, wheels or impeller hub etc.
Types of keys and their applications depend upon:
- the magnitude of th
Maximum Normal Stress Theory:
Maximum normal stress theory is based on failure in tension or compression. Applications of the
same include, the design of materials that are relatively strong in shear, but weak in tension or
For problems of sta
Failure Criterion for Machine Elements:
What is the criterion for failure based in normal stress and shear stress on an element within a
two dimension stress field, so that non-zero stresses are: x, y and xy?
n = x cos2 + 2 xy sin cos + y s
To obtain a set of head-flow curves for a centrifugal pump operating at a range of
pump speeds, and to relate those parameters to pump efficiency. To predict the
head flow characteristic at one pump speed from those