The diameter of an imaginary cylinder passing though the threads to make equal the widths of the threads and the widths of the spaces cut by the cylinder describes:
a. Angle of the thread
b. Major diameter
c. Pitch diameter
d. Minor diameter
e. Lead
c
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Answer the following statements true (T) or false (F)
1. Steel joists and joist girders are best utilized in a building that has concentrated loads. 2. Steel roof decks are either form decks or composite decks. 3. Steel floor decks are either form decks or composite decks. 4. Roof decks are anchored to supporting members by continuous welds along the support lines. 5. Spray-on fire protection of steel gives a much cleaner appearance than gypsum board encasement of steel.
Voltage signals (waveforms) that do not go below zero are called __________
A) DC coupled signals B) Pulse trains C) DC signals D) AC signals
____ are used to connect information to the place on a drawing that the information applies to.?
A. Section lines? B. Break lines? C. Leaders? D. Arrow lines?
A) What is the actual work produced in the turbine, per kilogram of entering steam? B) How much work is required in the pump, per kilogram of entering liquid water? C) What is the overall efficiency of the heat engine? D) 1000 kJ/min of work from this heat engine is used to power a refrigerator that operates on the vapor-compression cycle. The refrigerator has a coefficient of performance of 4.2. At what rate is heat removed from the condenser in this refrigeration cycle?
A steady-state heat engine operates on the following cycle: ? A boiler is used to produce superheated steam at P=40 bar and 450 °C. ? The steam enters a turbine, which has an efficiency of 80%, and expands to P=2 bar. ? The turbine effluent enters a condenser and is converted to saturated liquid. ? The liquid enters a pump and is compressed to P=40 bar. ? The compressed liquid is fed to the evaporator.