It is recommended that at least ____________________ a year, the probe should be removed from the water reservoir and cleaned.
Fill in the blank(s) with the appropriate word(s).
twice
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The single most important variable in soil compaction is the _____.
a. moisture content b. type of soil c. compacting equipment d. compaction method
On most systems, the odometer and speedometer receive their input from the vehicle ____ sensor.
A. motion B. tire diameter C. motor D. speed
Technician A says that in an open center circuit the hydraulic pump is rested (unloaded)when flow is not required by the actuator. Technician B says that in a closed-center circuit, the hydraulic pump runs continuously. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Pulse width modulation can be used to control a motor by using the duty cycle to ________
A) change effective current delivered to the motor winding B) change the effective voltage applied to the motor winding C) changiethe amplitude of the winding current D) change the amplitued of the winding voltage