What are the potential health risks of using wireless devices?
What will be an ideal response?
Wireless devices contain radio transmitters and receivers that emit radio frequency (RF) energy. Typically, these wireless devices emit low levels of RF energy while being used. Scientists know that high levels of RF can produce biological damage through heating effects (this is how a microwave oven is able to cook food). However, it is not known if lower levels of RF can cause adverse health effects. Although some research has been done to address these questions, no clear picture of the biological effects of this type of radiation has been found to date.
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Name the various ways concrete can be moved and placed.
What will be an ideal response?
One end of a diode has a beveled end that indicates it is the _____.
a. anode b. cathode c. collector d. emitter
How should you check your service brakes are working properly?
a. Park on level ground, chock the wheels, engage the parking brakes when you have the correct amount of air pressure to do so and shut the engine off. b. Park on slight grade, drain off air pressure, set parking brake and check to the movement. c. Park on level ground, wait until normal air pressure is reached, release the parking brake and move forward slowly at about 5 mph. Then apply the brakes firmly.
How many engineered-size bricks to the nearest whole brick are needed to build single-wythe chimney walls for a 30'6" tall appliance chimney having an 8" x 8" flue lining?
What will be an ideal response?