Which of the following sequence instructions would be used for a process tank control problem with four process states controlled by two process triggers?
A) Timer controlled SQO sequencer. B) Event controlled SQO sequencer.
C) Event controlled SQL sequencer. D) Timer controlled SQL sequencer.
B
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Answer the following statement(s) true (T) or false (F)
1. DC motors are generally operated at or above normal speed. 2. DC motors used in industry are never controlled by solid-state controllers. 3. A shunt field power supply converts direct current into alternating current with a rectifier. 4. Shunt field power supplies intended for motors that operate above normal speed must be capable of delivering less than rated voltage. 5. Silicon-controlled rectifiers (SCRs) control voltage by turning on at different times during the waveform.
Technician A says some 4WD vehicles use a solid front axle. Technician B says some 4WD vehicles use halfshafts to send torque to the front wheels. Which technician is correct?
A) Technician A only B) Technician B only C) Both Technicians A and B D) Neither Technicians A nor B
A 1/2 inch drive ratchet weighs 1 kilogram. How much is that in pounds?
A) 2.2 B) .26 C) 1.6 D) None of these
In a tilt-up wall construction system, the walls are _________.
A) precast at the construction site. B) precast in a plant and transported to the construction site for erection. C) cast in place at the construction site. D) B or C, whichever is more economical.