EMI in low-voltage circuits is often the result of __ using twisted conductors grounding the sheath sharing pathways with power circuits using sheathed power cables
What type of punch has a tapered shaft and point on the end? Brass punch Center punch Starter punch Pin punch
What do modern hydronic systems use to circulate the hot water? Select one: A. Pumps B. Gravity C. Fans D. Convection
What is the purpose of the expansion tank? Select one: A. To provide pressure for the water system B. To reduce the water temperature by expansion C. To allow room for extra water D. To allow for water volume changes due to temperature change
What materials are most commonly used for hydronic piping? Select one: A. PVC and CPVC B. CPVC and polybutylene C. Copper and galvanized iron D. Copper and cross-linked polyethylene
Which of the following can be done to prevent ground glass joints from sticking? A Lubricate the ends before joining B Use a Teflon sleeve at the joints C Both of the above D None of the above
What type of fire extinguisher should be used with electrical fires? A Type A B Type B C Type C D Any of the above
What invention made the development of the automobile possible? internal combustion engine steam engine electric motor rechargeable 12 volt battery
Which is something you should report as a possible clutch defect? A. A hard time getting into gear B. Vibration in the gas pedal C. Slow response to braking D. Oil leaks at wheel hubs
What identification information must be provided on a synthetic web slings? Hitch ratings Safety factors Date last certified Manufacturer's phone number
18. When you get done with running a bead on your welder, you should __ A. Turn off the welder B. Remove the electrode from the holder C. Set up your materials for your next pass D. Uncontrollably waive the live holder around your work space
What does a marine pump out station do? Pumps out waste from holding tanks Cleans contaminated fuel tanks Removes water from flooded bilges Controls water flow at a dam
A vertical spill is the toughest to control due to (Select all that apply): You do not know what the material will come in contact with You cannot see where the spill is going It is not easily contained. They are predictable
3 Multiple Choice 1 point In welding detail drawings welding symbols are used to show how the pieces are to be __ cut joined aligned machined Multiple Choice 1 point The main purpose of an assembly drawing is to show how the parts are __ to be used leader line going to appear in three dimensions put together in relation to one another
Resistance welding uses electric current and __ to join metals. continuous electrodes electron beams ionized gas pressure
When surfacing with high-alloy ferrous materials, the abrasion resistance __ and the impact strength __ as the alloy content increases. decreases, decresses decreases, increases increases, decreases increases; increases
Which of the following is a step in edge preparation for ferrous metals? Aligning the edges Cutting or gouging the edge Marking the weld's location Removing nicks and burrs
Which humidifier uses a pad consisting of numerous layers of a tight metallic mesh wetted by water delivered from above? Fixed filter Piezoelectric Plate Vaporizing Question 4 Which humidifier uses a series of porous materials that wick water upward to be evaporated by passing air? Fixed filter Piezoelectric Plate Vaporizing 5
In shielded metal arc welding, the shield is made of alloy metal flux gas oxides
22. Cylinder seals were commonly made from which of the following materials? a. Gold b. Glass c. Bronze d. Limestone
