Which truth-table output describes a 2-input AND gate?
Electronics
Question · Easy
Never vent refrigerant
Short
AND Gate
Flashcard
A NAND gate's output is the equivalent of which combination?
Unit of resistance that limits current to one ampere when one volt is applied.
Electrical theory
Guess the Term
Introduction & Exam Overview
1.1 USPS 955 Exam Structure & Scoring
Study guide
Cheat sheet
On a schematic, the symbol of a triangle pointing into a vertical line with a perpendicular bar represents which device?
Read the clue and guess the term in 6 tries.
Game
OR Gate
A diode is forward-biased when:
Question · Medium
Unit of potential difference defined as the force needed to drive one ampere through one ohm.
An NPN transistor is in saturation when:
Question · Hard
Gears: which way and how fast?
NOT Gate (Inverter)
Which gate outputs 1 when the inputs are different and 0 when they are the same?
Unit commonly used to specify electric power.
1.2 Personal Characteristics & Experience Inventory
An ideal op-amp has which of these characteristics?
Swap tiles to line up three of the same term.
Term Match
NAND Gate
A schematic shows a component with a coiled symbol crossed by an arrow. What is it?
Basic unit of current, equal to one coulomb of charge passing a point each second.
Which logic gate is functionally complete by itself (any logic circuit can be built from it alone)?
Lockout/tagout, called like a cup final
NOR Gate
A zener diode is normally operated in:
Rotating element of a DC machine.
Electrical machines
1.3 PSI Testing & Multicraft Test Strategy
What does the symbol with three terminals labeled E, B, and C represent on a schematic?
Flip two cards at a time to find matching terms.
Term Pairs
XOR Gate (Exclusive OR)
An LED operating at 20 mA with a 2 V forward drop is powered from a 5 V supply. What current-limiting resistor value is needed?
Stationary part of a motor or generator.
An inverting op-amp has Rf = 100 kΩ and Rin = 10 kΩ. What is its closed-loop voltage gain?
Small gear fast, big gear slow
Diode
On a schematic, a transformer is depicted as:
DC machine that receives voltage from an outside source and converts electrical energy into torque.
Chapter 2: Electronics
Section 2.1: Digital Logic Gates & Truth Tables
Which is NOT a typical use of an op-amp on USPS automation equipment?
Find five hidden terms in a grid of letters.
Term Search
Transistor
A flip-flop is a circuit that:
Machine that uses a stationary casing and a rotating impeller to move liquid.
Mechanical systems
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