Description : If a delicate component must be soldered into a circuit, the component may be protected from the heat of the soldering process by _____________. A. operating the soldering gun not more than 60 seconds at ... oxidizing the leads to be soldered D. coating the leads to be soldered with a light oil film
Last Answer : Answer: B
Description : When performing endotracheal suctioning, the nurse applies suctioning while withdrawing and gently rotating the catheter 360 degrees for which of the following time periods? a) 10-15 seconds In general ... suction for 0-5 seconds would provide too little time for effective suctioning of secretions.
Last Answer : a) 10-15 seconds In general, the nurse should apply suction no longer than 10-15 seconds because hypoxia and dysrhythmias may develop, leading to cardiac arrest.
Description : A soldering gun should NOT be used on what components?
Last Answer : Electronic components, such as resistors, capacitors, and transistors.
Description : A man was found dead in his study. He was slumped over his desk and a gun was in his hand. There was a cassette recorder on his desk. When the police entered the room and pressed the play ... . How did the detective immediately know that the man had been murdered and it wasn't a suicide? -Riddles
Last Answer : The cassette had started at the beginning of the man's utterance. Someone else had to be there to rewind the tape.
Description : Why is steel wool NEVER used as an abrasive to clean soldering tools?
Last Answer : The strands can fall into electrical equipment being worked on and cause short circuits.
Description : What is an advantage of using a resistance soldering iron when soldering wire to a connector?
Last Answer : The soldering tips are hot only during the brief period of soldering the connection, thus minimizing the chance of burning the wire insulation or connector inserts.
Description : Why are solvents used in the soldering process?
Last Answer : To remove contaminants from soldered connections.
Description : What type of flux must be used in all electrical and electronic soldering?
Last Answer : Noncorrosive, nonconductive rosin fluxes.
Description : What purpose does flux serve in the soldering process?
Last Answer : It cleans the metal by removing the oxide layer and prevents further oxidation during the soldering
Description : What causes the nuts or screws that hold the tips on soldering irons and guns to loosen?
Last Answer : The heating and cooling cycles.
Description : What should be done to a soldering iron tip that is pitted?
Last Answer : File the tip until it is smooth and retin it.
Description : State why a well-designed soldering iron is self-regulating
Last Answer : The resistance of its heating element increases with rising temperature, thus limiting the current flow.
Description : Why are small-wattage soldering irons not used to solder large conductors?
Last Answer : Although its temperature is as high as the larger irons, it does not have thermal inertia.
Description : What does "tinning" mean in relationship to soldering?
Last Answer : The coating of the material to be soldered with a light coat of solder.
Description : Why must items to be soldered be cleaned just prior to the soldering process?
Last Answer : Solder will not adhere to dirty, greasy, or oxidized surfaces.
Description : How should excess solder be removed from a hot soldering iron?
Last Answer : By use of a cleaning cloth.
Description : What safety precaution must you observe when soldering or hot-wire stripping fluoroplastic insulated wire?
Last Answer : Adequate ventilation.
Description : Flux aids in soldering by removing what from surfaces to be soldered?
Last Answer : Oxides.
Description : In soldering, what alloy changes directly from a solid state to a liquid state?
Last Answer : Eutectic.
Description : How do you prevent excessive heat buildup on an area of a board when soldering multilead components?
Last Answer : Use a skipping pattern
Description : What determines the shape and size of a soldering iron tip?
Last Answer : The type of work to be done.
Description : What is the most common source of heat in electronic soldering?
Last Answer : Conductive-type soldering iron.
Description : What happens to the fundamental mode as the operating wavelength becomes longer than the single mode cutoff wavelength?
Last Answer : The fundamental mode becomes increasingly lossy.
Description : With Firefox nothing happens when Ctrl F is pressed, with Explorer the box appears but nothing happens after that?
Last Answer : Salt isn’t mentioned in the article.
Description : What happens if you keep your foot pressed all the way down on the gas pedal while the car is on and in park?
Last Answer : You blow the engine if it doesn’t have a rev delimiter?
Description : Why can cardiac muscle fibres contract for longer periods than skeletal fibres? (a) Cardiac muscle is self-excitatory (b) Extracellular calcium partially controls the strength (and length) ... tubules are more developed in cardiac muscle (d) Cardiac muscle is uninucleate rather than multinucleate
Last Answer : Ans:(a)
Description : One of the disadvantages of reciprocity is that it can lead to: A)a price war B)higher promotional costs C)more competitive firms entering the industry D)less than optimal purchases for the buyer E)longer periods of negotiation
Last Answer : D)less than optimal purchases for the buyer
Description : Private networks can be a richer source of evidence than the Internet because: a. They retain data for longer periods of time. b. Owners of private networks are more cooperative with law enforcement. c. Private networks contain a higher concentration of digital evidence. d. All of the abov
Last Answer : c. Private networks contain a higher concentration of digital evidence.
Description : Private networks can be a richer source of evidence than the Internet because: a. They retain data for longer periods of time. b. Owners of private networks are more cooperative with law enforcement. c. Private networks contain a higher concentration of digital evidence. d. All of the above.
Description : Private networks can be a richer source of evidence than the Internet because: a. They retain data for longer periods of time. b. Owners of private networks are more cooperative with law enforcement. c. Private networks contain a higher concentration of digital Evidences d. None of the above.
Last Answer : c. Private networks contain a higher concentration of digital Evidences
Description : Private networks can be a richer source of evidence than the Internet because: A. They retain data for longer periods of time. B. Owners of private networks are more cooperative with law enforcement. C. Private networks contain a higher concentration of digital evidence. D. All the above.
Last Answer : C. Private networks contain a higher concentration of digital evidence.
Description : Why do some programs use more and more memory as they run for longer periods of time?
Last Answer : There are probably internal processes that load data into memory and the program does not clear the memory of unneeded data. Usually it means it is badly programmed.
Description : If you are asked to work over your shift time, can the employer ask or force you to take longer lunch periods or leave early later in the week to wipe out the overtime?
Last Answer : Yes your employer can have you leave early to keep your hours at 40.
Description : Excess intake of cobalt for longer periods leads to (A) Polycythemia (B) Megaloblastic anemia (C) Pernicious anemia (D) Microcytic anemia
Last Answer : Answer : A
Description : A grinding wheel is rotating at 3000 rpm. When the switch is turned off the wheel stops in 10 seconds. The uniform deceleration of the wheel was a.1 rad/s2 b.31.4 rad/s2 c.4 rad/s2 d.62.8 rad/s2 e.10.4 rad/s2
Last Answer : b. 31.4 rad/s2
Description : Types of oscilloscopes that are able to retain the display for a longer period of analysis. This display is retained by the use of flood gun.
Last Answer : storage oscilloscope
Description : Why are the electrostatic fields between the electron gun elements called lenses?
Last Answer : Because they bend electron streams in much the same manner that optical lenses bend light rays.
Description : What portion of an electron gun causes the electrons to accelerate or decelerate?
Last Answer : The buncher grids.
Description : What is longer 160 seconds or 3 minutes?
Last Answer : 3 minutes is 20 seconds longer
Description : Floral features are chiefly used in angiosperm identification because (a) flowers can be safely pressed (b) reproductive parts are more stable and conservative than vegetative parts (c) flowers are nice to work with (d) flowers are of various colours.
Last Answer : (b) reproductive parts are more stable and conservative than vegetative parts
Description : Why should wire be stripped 1/32 inch longer than the depth of the solder barrel?
Last Answer : To prevent burning the insulation during the soldering process and to allow the wire to flex easier at a stress point.
Description : When the frequency is decreased so that two quarter wavelengths are longer than the "a" (wide) dimension of the waveguide, what will happen?
Last Answer : Energy will no longer pass through the waveguide.
Description : In a sawtooth generator, why is the transistor turned on for a longer time than the discharge time of the RC network?
Last Answer : To allow the capacitor time to discharge.
Description : Why can multimode graded-index fiber 1300-nm systems using LEDs operate over longer distances and at higher bandwidths than 850-nm systems?
Last Answer : Longer distances and higher bandwidths are possible because fiber material losses and dispersion are significantly reduced at the 1300-nm region.
Description : What type of bias makes a diode act as a closed switch?
Last Answer : Forward bias.
Description : If the ignition switch is placed in the ON position and all the engine instruments operate properly except the gas gauge, where would the fault probably be?
Last Answer : Between point (3) and the gas gauge tank unit ground.
Description : What device is used to switch power from the normal source to an alternate source for nonvital users?
Last Answer : What device is used to switch power from the normal source to an alternate source for nonvital users?
Description : When cleaning the parts of a tape transport, why should you switch lint-free cloths and swabs often?
Last Answer : You may transfer dirt or oxide particles from one part of the tape transport to another
Description : If a switch must be checked with power applied, what type of meter is used?
Last Answer : A voltmeter.