Describe the input and output units of a computer.
What will be an ideal response?
The input and output units of a computer allow it to receive and transmit information from and to the world outside the computer. An operator or peripheral equipment enters data into a computer through the input unit. Data from the computer are passed to external peripheral equipment through the output unit.
The input and output units are under the control of the CPU. Special input/output (I/O) instructions are used to transfer data in and out of the computer.
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Estimate the rate of heat transfer from the compressor. Assume for air that 
and that enthalpy is independent of pressure.
Fifty (50) kmol per hour of air is compressed from 
= 1.2 bar to 
= 6.0 bar in a steady-flow compressor.
Delivered mechanical power is 98.8 kW. Temperatures and velocities are:
What are the four basic math, or arithmetic, functions?
What will be an ideal response?
To the contractor, what is the significance of the difference between an avoidable delay and an unavoidable delay?
What will be an ideal response?
The compressor in an A/C system is needed to ___________________
A) Keep the refrigerant circulating. B) Make the gas hotter than ambient air. C) Increase the gas pressure D) All of these