Insulators Study guides, Class notes & Summaries

True or False? "Electric current is readily conducted in metal (low resistance) because of the many free electrons" - CORRECT ANSWER True True or False? "Conventional current flow is from negative to positive." - CORRECT ANSWER False Materials that have a high resistance to current flow are called: A) Semi-conductors B) Conductors C) Insulators - CORRECT ANSWER C) Insulators True or False? "A gas can only conduct electricity when the gas has been ionized (...

4A Unit 7 Questions and Answers Already Passed The most efficient insulators are: Select one: a. substances with air gaps b. substances with microscopic air pockets c. substances with reflective surfaces d. substances with multiple membranes b Low pressure steam pipes are usually connected together by: Select one: a. Welding, glands or screwed b. Welding, screwed or flanged c. Screwed, flanged or glands d. Welded, screwed, flanged or glands b Improper drainage of steam ...

CETa Practice Test Questions With Verified Solutions 1. What does the acronym ESD stand for? A. Electrostatic Discharge B. Electrostatic Device C. Electromagnetic Sensitivity Diac D. Electrostatic Damage - answerA. Electrostatic Discharge Current amounts between ______ and _____ can be lethal. A. 100mA, 200mA B. 10mA, 33.3mA C. 33.3, 75.6mA D. 4mA, 10mA - answerA. 100mA, 200mA What is the number one concern in regards to electrical safety? A. Proper grounding B. ESD C...

Crane Safety and Rigging Question and answers correctly solved 2023/2024 What is the most common reason for crane-related fatal accidents? - correct answer Powerlines and then being struck by the crane load How do you escape an energized crane? - correct answer The whole body needs to stay in one spot. Do not separate your feet. So, hop on one foot or shuffle with your feet touching each other until far enough away from the crane OSHA specified that for construction work around powerlines...

CWB 2 Exam Prep Test Questions With Answers | Verified True or False? "Electric current is readily conducted in metal (low resistance) because of the many free electrons" - ANSWER True True or False? "Conventional current flow is from negative to positive." - ANSWER False Materials that have a high resistance to current flow are called: A) Semi-conductors B) Conductors C) Insulators - ANSWER C) Insulators True or False? "A gas can only conduct electricity when the gas has ...

Insulators charged by friction -when two insulators move relative to each other, friction between the two can result in both objects becoming electrically charged -one of the objects becomes positively charged and other is negatively -eg plastic being rubbed against duster -conductors can become charged but will only retain that charge of they are insulated from their surroundings. If not insulated, then any charge that builds up will leak away Charging by induction it's possible for obje...

HVAC S.T.A.R QUESTIONS AND ANSWERS ALREADY PASSED The evaporator in a refrigeration system: Is the component where refrigerant boils and absorbs heat. The purpose of the compressor is to change ___________. Low-pressure, low-temperature vapor to a high-pressure, high temperature vapor A common refrigerant leak detection device is the: Halide torch. Copper-plating of compressor parts is: Caused by contaminants in the system. If not properly installed, a hot-gas muffler might tra...

What does NEC stand for? - National Electric Code What is Ampacity? - The current carrying capacity of wire or cable expressed in amperes or amps. What is EMF? - Electromotive Force (volts) What is Amperage? - The measurement of electrical flow in a conductor. You check volts in parallel or series? - parallel You check amps in parallel or series? - series What is Voltage? - The difference in potential force between two points. Most often called Electromotiv...

MCDB 3135 Final Exam Questions & Answers 2023/2024 What is the most common step where regulation occurs, and what advantage does a cell have in regulating this step? - ANSWER-transcription initiation is most common regulatory step in bacteria and eukaryotes • eliminates wasteful investment of cellular energy in mRNA and protein synthesis • regulation downstream of transcription initiation can respond more rapidly regulatory proteins - ANSWER-that bind "regulatory sites" in DNA ...

Electrostatic Discharge - correct answer What does the acronym ESD stand for? 100mA, 200mA - correct answer Current amounts between __ and __ can be lethal. Shock - correct answer What is the number one concern in regards to electrical safety? Protons, neutrons, electrons - correct answer Bohr's Atomic Model consists of what three components? Shells - correct answer Electrons are arranged in __ around the nucleus. Conductors, semi-conductors, and insulators - correct answer What ...