What are used to prevent soil movement and cave-ins during the excavation of earth? Sloping involves cutting back the trench wall at an angle inclined away from the excavation. Shoring requires installing aluminum hydraulic or other types of supports to prevent soil movement and cave-ins. Is a trench considered a confined space? Some examples of […]
How many ways can a 10 question multiple choice test be answered if each question has 4 possible answers?
How many ways can a 10 question multiple choice test be answered if each question has 4 possible answers? 410 ways What is the probability of guessing the correct answer to a multiple choice question if there are 5 choices? What is the probability of getting 5 multiple-choice questions answered correctly, if for each question […]
Why is friction between the rolls and work material necessary in a rolling operation?
Why is friction between the rolls and work material necessary in a rolling operation? In addition to reducing the thickness of the work, the rolls also act to feed the material as they spin in opposite directions to each other. Friction is therefore a necessary part of the rolling operation, but too much friction can […]
How does a pitot tube work?
How does a pitot tube work? Pitot tubes work as flow sensors to measure the speed and pressure of air, liquid or gas. The front hole measures the stagnation pressure, while the side openings (static ports) gauge static pressure. The difference between these two measurements is called dynamic pressure – this is what is used […]
How long should you keep federal tax records?
What is the DARE program for schools?
What is the DARE program for schools? Drug Abuse Resistance Education (D.A.R.E.) is an education program that seeks to prevent use of controlled drugs, membership in gangs, and violent behavior. What does dare stand for 2020? Drug Abuse Resistance Education What did the DARE program do? They started D.A.R.E. in 1983 to curb the use […]
What is the difference between a 13 and 13R sprinkler system?
What is the difference between a 13 and 13R sprinkler system? Comparatively, NFPA 13R facilities are ‘partially sprinklered’ to provide life safety and a moderate level of building protection. Conversely, NFPA 13 provides protection to not only get people out to safety, but also to control or extinguish the fire – saving the building and […]
What is osmosis in potatoes?
What are the methods used for vibration analysis?
What are the methods used for vibration analysis? Vibration analysis is a process that monitors vibration levels and investigates the patterns in vibration signals. It is commonly conducted both on the time waveforms of the vibration signal directly, as well as on the frequency spectrum, which is obtained by applying Fourier Transform on the time […]