Auto study guide
Tech A says that a battery stores electrical energy in chemical form. Tech B says that a battery creates direct current. Who is correct?
Both A and B
Tech A says that a voltage drop test is typically used to find excessive resistance in a circuit. Tech B says that high resistance creates heat at the point of resistance in the circuit. Who is correct?
Both A and B
Tech A says that if airbags have been deployed, the affected seatbelts and pre- tensioners need replaced. Tech B says that there are relatively large holes in the rear of an airbag that allow it to quickly deflate after deployment. Who is correct?
Both A and B
Technician A says you should never strip wires with a knife or other sharp tool. Technician B says, though not preferred repairing wires with solderless connectors is acceptable, if done properly. Who is correct?
Both Techs A and B
Two techs are discussing a fuel pump and safety cutoff switch wired in series.
Both tech A and B
Technician A says seat belt pre-tensioners are used to tighten the seat belt in a severe frontal accident. Technician B says rip stitching is used on seat belts; During a collision, the pre- tensioners initially pull the seat belt tight; however, the stitching gradually tears, allowing the occupant to move forward into the airbag at a controlled rate. Who is correct?
Both technicians A and B
Tech A says that during an oil change, the battery and the entire system should be checked for reliability. Tech B says that the battery must work harder in the winter, so the fall is a good time to check the vehicle's charging/ starting system. Who is correct?
Both techs A and B
Tech A says you must have power supply for a simple circuit to work. Tech B says a switch will interrupt the circuit, and stop current from flowing. Who is correct?
Both techs A and B
The current flow in a lead acid battery flows in one direction only. What is this called?
Direct current or DC
What is the correct sequence for removing a batter?
Disconnecting the negative terminal and then the positive before removal.
Alternating current
Moves back and forth
Tech A says that 18 AWG wire is larger than 12 AWG wire. Tech B says that the larger the diameter of the conductor, the more electrical resistance it has. Who is correct?
Neither A nor B
Tech A says amperage cannot exist without both voltage and resistance. Tech B says if amperage is high, then you know that one of two conditions is present low voltage or high resistance. Who is correct?
Tech A
Tech A says wiring diagrams are like maps of the entire electrical system. Tech B says wiring diagrams have very little information and aren't much help. Who is correct?
Tech A
Tech A says in a bulb marked 12 V/21W, the filament will consume 12 watts of power when 21 volts are applied across the filament. Tech B says dual- filament bulbs, have two filaments of different wattage; one filament emits a small amount of light, and the second filament emits more light. Who is correct?
Tech B
Tech A says it's ok to have a voltage drop of 2 volts across a fuse. Tech B says when doing a voltage drop test with the switch open, you will show battery voltage across the switch. Who is correct?
Tech B
Tech A says that a parasitc draw is measured in volts. Tech B says that pulling fuses one at a time while watching the current draw of the vehicle with a DVOM can help narrow down the location of a parasitic draw. Who is correct?
Tech B
Tech A says that the starter converts mechanical energy to electrical energy. Tech B says that the starter converts electrical energy to mechanical energy. Who is correct?
Tech B
Tech A says the leads on a multimeter are negative and positive. Tech B says the test leads on an oscilloscope that we normally use are yellow, blue, and green. Who is correct?
Tech B
Tech A says when checking resistance in a circuit, you need to have power connected to the component. Tech B says when you are attempting to check resistance of a component, you should have a component disconnected. Who is correct?
Tech B
Tech A says when doing a voltage drop test, the voltmeter needs to be set to ohm. Tech B says current has to be flowing to do a voltage drop test. Who is correct?
Tech B
Technician A says that a diode should have continuity in both directions. Technician B says that diodes should have continuity in one direction only. Who is correct?
Tech B
Two technicians are discussing a pair of light bulbs in series. Technician A states that if one of the bulbs burns out, the other will remain lit. Technician B states that if one bulb burns out, neither light will be lit. Which technician is correct?
Tech B
Two technicians are discussing a vehicle's charging system running at 17.2 volts. Technician A says it is normal for newer vehicles to run a higher voltage like that. Technician B says a faulty voltage regulator could cause that condition. Who is correct?
Tech B
Two technicians are discussing duty cycle. Technician A states that it is a measure of the average voltage applied to a circuit. Technician B states that it is a measure of the percent of time a circuit is on versus off. Which technician is correct?
Tech B
Two technicians are discussing a parasitic load test. Technician A says that the parasitic load is measured with an ammeter. Technician B says that the parasitic load is measured with a voltmeter. Who is correct?
Technician A
There are two types of drivebelts. What are they?
V- type and serpentine type