How can a technician determine a major component failure on a mid-efficiency furnace?
A) The technician must examine each component to ensure it is operating properly.
B) The unit owner must accurately describe how the unit is operating to diagnose component failure.
C) The technician can use the self-testing feature on the control box.
D) The technician can send the control box in to the manufacturer.
C
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What does the foot control allow the operator to do?
A) The foot control controls the crow of the weld bead, and the weld ripples. B) The foot control controls the speed; thus, it allows the operator to weld faster. C) The foot control controls the shielding gas, current, amps, and volts needed to make a sound weld. D) The foot control allows a variation in the amount of available current the operator can use. E) A and D
Because of the benefits that it conferred on labor, Samuel Gompers called the ____ "labor's Magna Charta."
A. Federal Reserve Act B. Underwood Tariff Act C. Clayton Anti-Trust Act D. Wagner National Labor Relations Act E. Workmen's Compensation Act
The instructions ona low-pressure switch read "cut-out is cut-in less differential." To set the switch to cut-out at 30 psig:
A) Set both the cut-in psig and differential at 20 psi. B) Set the differential at 45 psi and the cut-in at 15 psig. C) Set the cut-in at 45 psig and the differential at 15 psi. D) Set the cut-in at 45 psig and the differential at 20 psi.
A tool used for checking system pressures, evacuating systems, recovering systems, and charging systems is:
A) A digital thermometer. B) A vacuum pump. C) A recovery cylinder. D) A gauge manifold.