What function is performed by a 74194 Universal Shift Register if the select inputs are S1 = 1 and S0 = 1?
A) shift right B) shift left C) parallel load D) hold
C
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If records show that thermodynamic traps on one particular installation suffer repeatedly from rapid wear, the trap may be _____.
a. dirty b. the wrong type c. overpressurizing d. oversized
Technicians should be cautious when taking an oil sample from a semi-hermetic compressor because:
A) The oil is highly flammable. B) The oil is highly toxic. C) The oil sample must be done with the compressor running. D) The compressor crankcase is under pressure.
As the percentage of antifreeze in the coolant? increases, ____________.
A) The boiling point decreases B) The freeze point decreases (up to a point) C) The heat transfer increases D) All of the above occurs
The three basic methods of sensing ground faults are ground-return, residual, and _____.
a. inductive heating b. repeating c. zero sequence d. saturation