Photoelectric - Study guides, Class notes & Summaries

What is the most important law applicable to the study of electricity? - Answer-Ohm's Law What are the elements of Ohm's Law? - Answer-Voltage, Current & Resistance What are four sources of electrical power? - Answer-Mechanical, chemical, photoelectric and thermal What does an electrical circuit consist of? - Answer-1. a source of electrical pressure 2. resistance 3. conductors What represents capacitance in an AC circuit? - Answer-a capacitor What is the function of a capaci...

Does a fire hood system and a kitchen need to be monitored by the fire alarm system? - Yes What does P.L.F.A stand for? - Power Limited Fire Alarm What does N.P.L.F.A stand for? - Non-Power Limited Fire Alarm What is the difference between P.F.L.A and N.P.F.L.A? - an N.P.L.F.A can operate at up to 600v, and the power output isn't limited a P.L.F.A has the voltage and power limited by a listed power source. What material must N.P.F.L.A circuit conductors be made from? - ONLY solid...

List the four components that make up a typical alarm system. correct answers Fire alarm control panel FACP Power Supply Initiating device notification appliance Every sprinkler system is equipped with a main water control valve. Most main water control valves are of an indicating type. Give 2 examples of Indicating valves. correct answers Post Indicating Valves (PIVs) Outside Screw and Yoke (OS&Y) What are the two types of smoke detectors? correct answers ionization and photoelectric...

ABSA: 4th Class Part B - Comprehensive Exam 4 150 Multiple Choice, 4th Class Part B , Units 2 Temporary hardness in feedwater is caused by: Select one: a. Magnesium sulphate b. Calcium carbonate c. Magnesium bicarbonate d. Sodium nitrate c What is the recommended boiler water pH for wet layup? Select one: a. 10 b. 12 c. 7.5 d. 7 a A photoelectric flame scanner: Select one: a. Produces a steady voltage signal b. Requires a clear line of sight to the flame c. condu...

ABSA: 4th Class Part B - Comprehensive Exam 1 Latest Update Graded A+ Temporary hardness in feedwater is caused by: Select one: a. Magnesium sulphate b. Calcium carbonate c. Magnesium bicarbonate d. Sodium nitrate c What is the recommended boiler water pH for wet layup? Select one: a. 10 b. 12 c. 7.5 d. 7 a A photoelectric flame scanner: Select one: a. Produces a steady voltage signal b. Requires a clear line of sight to the flame c. conducts current throug...

What is the most important law applicable to the study of electricity? - Answer-Ohm's Law What are the elements of Ohm's Law? - Answer-Voltage, Current & Resistance What are four sources of electrical power? - Answer-Mechanical, chemical, photoelectric and thermal What does an electrical circuit consist of? - Answer-1. a source of electrical pressure 2. resistance 3. conductors What represents capacitance in an AC circuit? - Answer-a capacitor What is the function of a capaci...

Low photon energy and high atomic number Combination of photon energy & tissue atomic # results in the highest probability of PE effect *Low photon energy and low atomic number *Low photon energy and high atomic number *High photon energy and low atomic number *High photon energy and high atomic number Step down voltage and step up current How does the filament transformer of the x-ray machine change the shape of electrical power? *Step up voltage and step down current *Step down ...

Which of the following contributes significantly to the exposure of the radiographer? A. positrons B. electrons C. compton scatter D. photoelectric effect correct answersC. Small angle scatter will: A. degrade the image by blurring the sharp outline of the structures B. enhance the appearance by clearly delineating the outlines of structures C. enhance the appearance of the image only when a positive contrast medium is used D. occurs only as a result of pair production correct answers...

CEM 141 MSU Exam 2 Questions and Answers Already Passed Lights acts as what? Particle and wave. Wavelength The distance (m) of waves from peak to peak. Short: x-ray (red), long: infrared (blue) Short - higher energy Long - lower energy Frequency (V) The number of wavefronts per second. Highest: x-ray Velocity of Light C = 3.00 X 10^8 = wavelength X frequency Amplitude The intensity, height of peaks of waves. Highest: blue light Energy of Wave (J) Increases as frequency i...

What is the most important law applicable to the study of electricity? - Ohm's Law What are the elements of Ohm's Law? - Voltage, Current & Resistance What are four sources of electrical power? - Mechanical, chemical, photoelectric and thermal What does an electrical circuit consist of? - 1. a source of electrical pressure 2. resistance 3. conductors What represents capacitance in an AC circuit? - a capacitor What is the function of a capacitor? - to store electricity