Describe how hydraulic fluids are selected.
What will be an ideal response?
Hydraulic fluids are selected based on the work to be done and the chemical properties of the liquid. For example, a low-boiling-point liquid will not be used in a high-temperature application.
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Slide valves allow screw compressors to vary capacity from full capacity (100 percent) to as low as _____.
a. 10 percent capacity b. 25 percent capacity c. 50 percent capacity d. 75 percent capacity
Shorter runners in a port fuel injected engine provide which of these?
A) Minimum low-RPM power B) Minimum high-RPM power C) Increased low-RPM power D) Increased high-RPM power
What is one the most useful properties of the Smith chart?
A. Its ability to solve impedance-matching problems. B. It is an easy measure indication of the severity of mismatch. C. It exhibits properties of inductance and capacitance. D. It can determine the effects on impedance of changes to component values.
What is the source current of the 74LS244?
A) 15 mA B) 18 mA C) 24 mA D) 12 mA