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| 1.
|  |  When switch S is closed, the LED is ___ because point A in the circuit is at a ___ logic level.
 (3.0K) |
|  | A) | Lit, LOW |
|  | B) | Lit, HIGH |
|  | C) | Not lit, LOW |
|  | D) | Not lit, HIGH |
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| 2.
|  |  Two devices that might be used to create isolation between digital input circuitry and higher voltage and/or noisy output circuitry are ___ and ___. |
|  | A) | Relays and optoisolators |
|  | B) | Gates and D-to-A isolators |
|  | C) | A-to-D converters and relays |
|  | D) | Isolation BBRs and logic gates |
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| 3.
|  |  Component R1 is best called a(n) ___ resistor based on its job in the circuit.
 (3.0K) |
|  | A) | Anchor |
|  | B) | Limiting |
|  | C) | Pull-down |
|  | D) | Pull-up |
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| 4.
|  |  In digital IC specifications, the number of inputs that can be driven by a gate's output is called ___. |
|  | A) | Target drive |
|  | B) | Propagation speed |
|  | C) | Virgule push |
|  | D) | Fan-out |
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| 5.
|  |  The ___ series of CMOS ICs is favored for many new digital designs because it has superior drive capabilities, low power consumption, excellent speed, and good noise immunity. |
|  | A) | 7400 |
|  | B) | TTL |
|  | C) | FACT |
|  | D) | None of the above |
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| 6.
|  |  If the input to the inverter goes LOW, the base of the NPN transistor goes ___ (HIGH, LOW) causing the transistor to ___ (conduct, not conduct) and the LED to ___ (light, not light).
 (3.0K) |
|  | A) | LOW, not conduct, not light |
|  | B) | HIGH, conduct, not light |
|  | C) | HIGH, conduct, light |
|  | D) | HIGH, not conduct, not light |
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| 7.
|  |  An electromechanical device that might be chosen by a designer for an application where a shaft must have an exact angular position would be a(n) ___. |
|  | A) | DC motor |
|  | B) | AC motor |
|  | C) | Solenoid |
|  | D) | Stepper motor |
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| 8.
|  |  Logic gates from the ___ family of ICs have better noise immunity. |
|  | A) | CMOS |
|  | B) | DVD |
|  | C) | RTL |
|  | D) | TTL |
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| 9.
|  |  The design of interconnections between circuits that shift the levels of voltage and current to make them compatible is called ___. |
|  | A) | Analog rectifying |
|  | B) | Converting |
|  | C) | Drive mapping |
|  | D) | Interfacing |
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| 10.
|  |  The _____ family of ICs has the least input loading. |
|  | A) | ABC |
|  | B) | CMOS |
|  | C) | TTL |
|  | D) | RTL |
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