Geotechnical engineering and engineering geology are a branch of civil engineering
Answer:
1. Conduction
2. Convection
3. Radiation
Explanation:
The 3 modes of heat transfer i an air conditioning system:
1. Conduction:
The transfer of heat by conduction takes place in solid and is when the conduction takes place as a result of direct contact in between the interacting material which transfer the heat energy from particle to particle thus conducting the heat through out the system.
2. Convection:
The other mode for the transfer of heat which takes place especially in fluids - gases and liquids is through the technique of convection in which the transfer of heat takes place by the circular motion of the atoms and molecules of the fluid which carries the heat energy and results in the distribution of the heated fluid in the entire system thus transferring all the heat energy in the entire system.
3. Radiation:
The third mode of heat transfer in the air conditioning system is through radiation. This method transfers the heat by making use of the electro-magnetic radiation in the infra red spectrum where the waves of the spectrum transfers the heat energy with the help of a medium or without any medium at all.
Thus making the radiation method of heat transfer as the only method out of the three methods which does not require the material medium for the transfer of heat energy.
Answer:
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Explanation:
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Answer:
Explanation:
Cylinders shall be kept far enough away from the actual welding or cutting operation so that sparks, hot s lag, or flame will not reach them. When this is impractical, fire resistant shields shall be provided. Cylinders shall be placed where they cannot become part of an electrical circuit.
Answer:
a) the temperature to which the pin must be cooled for assembly is 
b) the radial pressure at room temperature after assembly is 
c) the safety factor in the resulting assembly = 6.4
Explanation:
Coefficient of thermal expansion 
Yield strength 
= 400 MPa
Modulus of elasticity (E) = 209 GPa
Room Temperature 
= 20°C
outer diameter of the collar 
inner diameter of the collar
pin diameter 
= 
Clearance c = 0.06 mm
a)
The temperature to which the pin must be cooled for assembly can be calculated by using the formula:
-0.09 = 
-0.09 = 
=
−0.07523262 =
b)
To determine the radial pressure at room temperature after assembly ;we have:
c) the safety factor of the resulting assembly is calculated as:
safety factor = 
safety factor = 
safety factor = 6.4
Thus, the safety factor in the resulting assembly = 6.4
