Practice Test Geeks(CET) Certified Euthanasia Technician Practice Test
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Digital Logic & Microprocessors Flashcards

7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Digital Logic & Microprocessors flashcards as text

  1. In a microprocessor-controlled euthanasia chamber, a sensor outputs a HIGH signal when CO2 concentration exceeds 70%. Which logic gate produces a HIGH output only when BOTH the concentration sensor AND the door-closed sensor are HIGH?

    Answer: AND gate

    An AND gate outputs HIGH only when all inputs are simultaneously HIGH, making it ideal for safety interlocks requiring multiple conditions to be met.

  2. A euthanasia equipment controller uses an 8-bit binary counter to track cycle duration. What is the maximum decimal count value this counter can represent?

    Answer: 255

    An 8-bit counter can represent values from 0 to 255 (2^8 - 1 = 255), giving 256 total states.

  3. Which number system uses only the digits 0 and 1 and is the native language of digital microprocessors in euthanasia equipment controllers?

    Answer: Binary

    Binary (base-2) is the fundamental number system of all digital microprocessors because electronic components naturally represent two states: on (1) and off (0).

  4. A gas flow controller in a euthanasia system uses a truth table with inputs A (flow valve) and B (pressure OK). The output is HIGH only when A=1 and B=0, OR when A=0 and B=1. Which gate implements this logic?

    Answer: XOR gate

    An XOR (exclusive OR) gate outputs HIGH only when inputs differ, matching the condition A=1,B=0 or A=0,B=1.

  5. In a microprocessor-based euthanasia system, the program counter (PC) register serves what primary function?

    Answer: Holds the address of the next instruction to execute

    The program counter always holds the memory address of the next instruction the CPU will fetch and execute, controlling program flow.

  6. A euthanasia equipment display shows the hexadecimal value 0xFF. What is the decimal equivalent?

    Answer: 255

    0xFF in hexadecimal equals 15×16 + 15 = 240 + 15 = 255 in decimal.

  7. Which type of memory in a euthanasia controller retains its stored program and calibration data even when power is removed?

    Answer: ROM/Flash memory

    ROM and Flash memory are non-volatile, retaining data without power, making them suitable for storing firmware and calibration settings in euthanasia equipment.