Which of the following suspension components is used specifically to dampen oscillation frequency?
A. coil springs
B. air springs
C. shock absorbers
D. spring shackles
Answer: C
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It is not necessary to have a DC power plant and distribution system due to the wide use of solid-state ____.
a. fuses b. capacitors c. rectifiers d. transformers
Mortar is measured in cubic yards or cubic meters.
Answer the following statement true (T) or false (F)
A) What is the actual work produced in the turbine, per kilogram of entering steam? B) How much heat is removed in the condenser, per kilogram of liquid produced? C) How much work is added in the pump, per kilogram of liquid? D) How much heat is added in the boiler, per kilogram of steam produced? E) How much heat is added in the superheater, per kilogram of steam? F) What is the overall efficiency of the heat engine?
A steady-state heat engine operates on the following cycle: ? A boiler is used to produce saturated steam atP=40 bar. ? That steam enters a superheater which heats it to 450 °C without changing the pressure. ? The superheated steam enters a turbine, which has an efficiency of 80%, where it expands to P=2 bar. ? The turbine effluent enters a condenser and is converted to saturated liquid at P=2 bar. ? The liquid enters a pump and is compressed to P=40 bar. ? The compressed liquid is fed to the boiler.
To avoid freezing the water in the chiller during recovery
A) Circulate the chiller water B) Add nitrogen to the chiller C) Turn off the condenser water pumps D) Operate the chiller