| 1) A capacitor has the ability to do what? |
| a) produce a DC voltage |
| b) store a DC voltage |
| c) produce an AC voltage |
| d) boost current flow |
| |
| 2) With an AC voltage applied to a circuit, which direction will current flow? |
| a) AC voltage produces no current flow |
| b) from plus to minus |
| c) both directions |
| d) from minus to plus |
| |
| 3) A full wave rectifier is used for what purpose in a welding machine? |
| a) voltage boost circuits |
| b) output current control |
| c) regulating input current |
| d) producing a DC voltage |
| |
| 4) The function of the main transformer used in a welding power source is to? |
| a) step down input voltage |
| b) step down input current |
| c) control the welding arc |
| d) produce a DC voltage |
| |
| 5) The color bands on a resistor represent what? |
| a) its inductance |
| b) its wattage |
| c) its resistance value |
| d) its temperature rating |
| |
| 6) What is true about the function of a diode? |
| a) it is used primarily for filtering AC |
| b) it can conduct current in only one direction |
| c) it is used primarily in DC circuits |
| |
| 7) When using a multi-meter the red lead represents what? |
| a) current measurement lead |
| b) AC lead |
| c) positive lead |
| d) capacitance measurement lead |
| |
| 8) A diode has two main parts, name them. |
| a) gate, triode |
| b) primary, secondary |
| c) anode, cathode |
| d) wiper, ear |
| e) coil, contact |
| |
| 9) A shunt, when used in a welding machine, is used for what purpose? |
| a) rectification |
| b) welding voltage sense |
| c) voltage step down |
| d) welding current sense |
| |
| 10) The terms RMS, Peak, and Peak-to-Peak refer to what? |
| a) AC voltage measurements |
| b) DC current measurements |
| c) DC voltage measurements |
| d) none of these |
| |
| 11) What component would be used to obtain constant voltage in a welding power source? |
| a) resistor |
| b) transformer |
| c) capacitor |
| d) shunt |
| |
| 12) Reactance is a term associated with? |
| a) DC circuits |
| b) very high voltage |
| c) very low voltage |
| d) AC circuits |
| |
| 13) What is a true statement about a SCR? |
| a) a gate pulse is needed for conduction |
| b) a gate pulse stops conduction |
| c) a term for short circuit resistance |
| |
| 14) Hertz is short for what? |
| a) cycles per minute |
| b) cycles per milli-second |
| c) cycles per second |
| d) movement in a car |
| |
| 15) In regards to an oscilloscope, what is a true statement about the trace going from left to right? |
| a) voltage measurement |
| b) capacitance measurement |
| c) time measurement |
| d) resistive measurement |
| |
| 16) A reed switch needs what to perform its function? |
| a) magnetism |
| b) light |
| c) vibration |
| d) air |
| |
| 17) The term microfarad is associated with what? |
| a) a capacitor |
| b) a SCR |
| c) a diode |
| d) an inductor |
| |
| 18) The easiest way to verify that a welding machine has an output is? |
| a) with a tachometer |
| b) with a voltmeter |
| c) with an output checker |
| d) with a millimeter |
| |
| 19) A transistor can be compared to what? |
| a) a magnetic field |
| b) a switch |
| c) a transformer |
| d) a rectifier |
| |
| 20) LED is short for what? |
| a) large electronic diode |
| b) light entering diode |
| c) large emissions diesel |
| d) light emitting diode |
| |
