After the water pump was replaced and the cooling system refilled with coolant, the heater stopped providing warm air. Which of these is the most likely cause?
A) The wrong concentration of antifreeze was installed
B) An air pocket is trapped in the heater core
C) A defective heater control valve
D) A slipping water pump drive belt
B) An air pocket is trapped in the heater core
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?Technician A says high current is caused by high resistance. Technician B says a short to ground can occur internally within a component. Who is correct?
A. ?A only B. ?B only C. ?Both A and B D. ?Neither A nor B
The subsequent problems deal with the circuit below, where the op amp is an LM741 with an output short circuit current of 25 mA, and a maximum output voltage swing of +/? 13.6 V. NOTE: do not assume the op amp is "ideal."
The open-loop frequency response curve for the op amp, as provided by the manufacturer is:
If Vin=5V, and R=1k?, which direction is current flowing into or out of the op amp output pin?
A. out (current is being "sourced") B. in (current is being "sunk") C. 0 (not in or out)
A scaling adder is used as a four-input analog-to-digital converter. If the 2^2 input resistance is 16 k?, what is the value of the 2^3 resisttor?
A) 4 k? B) 32 k? C) 256 k? D) 8 k?
?Solar collector efficiency is higher under higher fluid inlet temperatures.
Answer the following statement true (T) or false (F)