What is the BCD system and why was it created?
What will be an ideal response?
When large decimal numbers are to be converted to binary for memory storage, the process becomes somewhat cumbersome. To solve this problem and speed conversion, the BCD system was devised. In the BCD system, four binary digits (base 2) are used to represent each decimal digit. To distinguish the BCD numbering system from a binary system, the designation BCD is subscripted and placed to the lower right of the units place.
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In general, the pull exerted on cables pulled through cable trays using a basket grip not attached to the conductor should not exceed _____.
a. 500 pounds b. 1,000 pounds c. 2,500 pounds d. 6,000 pounds
What should you do to verify valve position?
A) Make sure there are no leaks B) Examine the valve for excessive wear C) Check that the correct type valve is used in the correct way D) Make sure the valve stems are properly lubricated
A liquid mixture is composed of 40 mol% W and 60 mol% Z. Find the bubble point pressure of this mixture at T=50 ?C, and determine the mole fraction of W in the first bubble of vapor.
This problem concerns mixtures of two compounds, W and Z. At T=50 ?C, the vapor pressures are PWsat = 0.6 bar and PZsat = 1.0 bar. Mixtures of the two compounds at this temperature can be modeled using the one-parameter Margules equation, with A = -1.5.
When designing a piping system, select a circulator that delivers up to ____ more head than required at the desired flow rate.
a. 5% b. 10% c. 25% d. 50%