A diode is a semiconductor device that ________
A) Blocks current in both direction B) Reverses current flow
C) Blocks current in one direction D) Causes voltage spikes
C
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Technician A says that multi-orifice hydraulic injectors have hard value NOPs. Technician B says that NOPs in electrohydraulic injectors (EHIs) have variable NOPs that are controlled by the ECM. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
You find that the CEC of a sandy loam soil at pH 5.0 is 8 cmolc/kg and at pH 8.2 it is 14 cmolc/kg. What is the most likely reason for this difference?
A) replacement of trivalent Al3+ ions with divalent Ca2+ ions at high pH. B) increase in the pH-dependent charges on 2:1 type silicate clays C) ionization of carboxyl and phenolic groups to release H+ ions D) removal of Al atoms from tetrahedral layers at low pH. E) removal of Al3+ ions from the exchange complex at higher pH.
When other workers are working near a welding operation, the standard practice is to _____
a. weld at a lower temperature to reduce risk b. stop work until everyone leaves c. make sure there are plenty of fire extinguishers available d. screen the work area with welding shields
Sources of on the job stress involve all of the following except: