CWEA E/I Level 4 Questions and 100% CORRECT answers

1. What is the main electrical danger when using power tools? a. Excessive heat b. Low-resistance grounding c. Over-current d. Short circuit - ANSWERd. Short circuit 2. What is the most important feature for adequate equipment grounding? a. Insulation b. Low current c. Low-impedance path d. Over-current devices - ANSWERc. Low-impedance path 3. An explosion-proof enclosure: a. can withstand and contain an internal explosion. b. can withstand an external explosion. c. is identical to a purged enclosure. d. prevents internal explosions. - ANSWERa. can withstand and contain an internal explosion. 4. The first requirement on a work site is: a. preventive maintenance. b. work quality. c. meeting deadlines. d. safety. - ANSWERd. safety. 5. What is the purpose of the cage in an anti-friction bearing? a. Keep the grease next to the rolling elements b. Hold the rolling elements in the races during assembly c. Hold the rolling elements in the races during operation d. Properly space the rolling elements and guide them through the load zone - ANSWERb. Hold the rolling elements in the races during assembly 6. What does the term "braided" refer to when applied to a pressure hose and/or fuel line? a. Type of inner hose reinforcement b. Type of material used for fluid contact c. Method of connecting hose sections d. Hose covering material - ANSWERa. Type of inner hose reinforcement 7. The pitch of a screw thread is: a. the angle included between the sides of the thread measured in the axial plane. b. the distance from a point on the screw thread to a corresponding point on the next thread. c. the angle included between the side of a thread and the centerline, measured in the axial plane. d. the distance a screw advances axially in one turn. - ANSWERb. the distance from a point on the screw thread to a corresponding point on the next thread. 8. Which welding process produces the highest quality weld on stainless steel? a. Oxyacetylene b. Shielded metal-arc c. Gas metal-arc d. Gas tungsten-arc - ANSWERc. Gas metal-arc 9. Which of the following "trouble causes" would be associated with a pump that fails to discharge on startup? a. Leaks in the stuffing box b. Excessive pump clearances