30. What role do microcontrollers play in HVAC systems? a. Temperature sensing b. Optimize energy efficiency c. Air pressure measurement d. Change color properties

Which of the following is the purpose of the Power Supply? To take current from your outlet and convert it from lower DC power to a higher AC current. To take current from your outlet and convert it from higher AC current down to lower DC power. To provide power to your system in the event of an electrical outage for a period of time so you can save your data. To handle a lightning strike so that

The two large classes of metering devices are: Select one: A. Fixed restrictions and thermostatic expansion valves. B. Fixed restrictions and broken restrictions. C. Floats and valves. D. Hand valves and automatic valves.

The purpose of a four-wheel drive freewheeling hub is to do all of these EXCEPT: A Improve the vehicle's fuel economy. B Automatically engage 4WD when wheels slip. C Improve the vehicle's performance. D Reduce drive train wear and noise.

Which of the following is a common reason PFAS fail? The materials degrade quickly. Workers gain or lose weight and don't get a new harness. Employers buy the wrong kind of PFAS for the job. Workers don't connect to an anchorage point.

True or False? Only non-sparking tools should be used to clean up spills of materials that are flammable.

The forward voltage of rectifier diodes is low enough that a common ohmmeter can supply enough voltage to cause conduction. True False

The circumference of the tires on a vehicle with four-wheel drive should be within: A 1.0 inches of each other. B 0.50 inches of each other. C 0.25 inches of each other. D 0.10 inches of each other.

Electronic diagrams are drawn to assume that current flows from negative to positive. True False

Removing a battery is easy. Drag and drop the steps in the correct order. Loosen and remove the positive battery cable Loosen and remove the negative battery cable Remove the battery Remove the battery heat shield Remove the battery hold down Place the red clamp on the positive terminal

Which of these is a good method for making certain all straight pins are removed from a costume? counting the number of pins used initially feeling around the costume for missing pins using a magnet to remove the pins avoid using straight pins