__ occurs when one gas flows backwards into the opposite side gas line due to a pressure Imbalance or a restriction in flow. Backfire Reverse flow Flashback
Can they adapt and handle new material? square
Which potential problem with electrical distribution and motors is caused by the loss of cooling airflow? A High temperatures B Equipment failure C High vibration D Motor not starting
Relays are electromechanical switches that lack auxiliary contacts. True False
The greatest difference between relays and contactors is the fact that contactors are equipped with large contacts that are intended to connect high-current loads to the power line. True D False
Where is the ideal place to install safety nets? 10 feet off the ground 10 feet below the working surface 30 feet under the working surface Directly under the working surface
Which maintenance tasks should be performed every trip? Visually check tire inflation and condition Check battery terminals Inspect coolant fluid and brake master cylinder
A manual reversing starter uses __ Select one: a. a mechanical interlock b. an electrical interlock c. two separate coils d. a single coil
Which diesel system supplies high-pressure diesel fuel to all of the injectors all of the time? Select one: A. Inline B. Rotary C. High pressure common rail D. Distributor
Using E85 can result in which of these? Select one: A. Reduced fuel economy B. Increased exhaust emissions C. Increased fuel economy D. Decreased exhaust emissions
What determines the maximum fuel outlet pressure from a mechanical diaphragm pump? a. Fuel line restriction b. Engine rpm c. Spring force d. Return check valve
How can a process technician prevent a dust explosion? A Remove moisture B Add moisture C Open a window D Keep particles in a contained area
A pressure switch is rated according to its __ pressure range. operating resting maximum minimum
Q1: Which of the following steps are NOT part of a transfer case fluid inspection? 1. Locate the oil fill plug on the transfer case and remove it using air tools. 2. Use your finger to check the oil level in the fill plug hole. 3. Add the correct amount and type of fluid if necessary. 4. Reinstall the transfer case fill plug hole and tighten to specification.
You need to install a pull box in a run of conduit.The conduit contains twenty 18 AWG wires . What is the minimum size $4''$ square box you could use? Use the following table to determine the MINIMUM size $4''$ square box required.
Pipe wrenches usually come in different sizes which are located: It doesn't matter what size the wrench is it'll work anyways. On the side of the wrench. On the internet.
A-CAC melts the base metal with a high-current electric arc between the base metal and the end of a(n) __ a) high-frequency pilot arc b) idle arc c) carbon-graphite electrode d) plasma jet
The electronic variable displacemen compressor is based on what type of compressor design? A Rotary compressor design B Swash plate compressor design C Scroll compressor design D Vane compressor design
Which is a safety procedure related to fire hose testing? Always wear full structural PPE Only use portable tanks as a water source Only walk near pressurized hose when necessary Always test hoses in lengths greater than 300 feet (100 m)
a system with low duty factor is imaging at a __ depth than a system with high duty factor. shallower Cannot be determinec using this information deeper Duty Factor and depth are not related
