What type of signal is used to control Cummins HPI-TP timing and fueling actuators?
A. pulse width modulated (PWM)
B. spiked DC
C. data bus
D. AC
Answer: A
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Why was there some resistance to Hagenbeck's idea of naturalistic exhibits?
a. Animals were being mistreated and care was not given to their comfort and safety. b. Animals were being displayed in isolation rather than in groups. c. The animals were thought be too far away to be seen and appreciated properly. d. Animals were stressed and not thriving in the environment.
Answer the following statements true (T) or false (F)
1. Livestock have been domesticated for about 20,000 years. 2. In general, only the smartest animals survive in the wild. 3. Many of the traits that are essential for survival in the wild prove disadvantageous in domesticated situations. 4. Livestock evaluation is an art and a science. 5. As society becomes more complex, dual-purpose animals are gaining popularity.
In a typical color-code system, the color black signifies ____.
A. board outline, holes, pads, and hardware B. connecting traces on the component side C. component electrical symbols and outlines D. through holes
What type of fluid level sensor is used to signal sump level on a Caterpillar CX transmission?
A. rheostat variable resistor float B. potentiometer C. optical D. Hall-effect