Eddy currents - Study guides, Class notes & Summaries

Is SNR proportional or inversely proportional to voxel volume - ACCURATE ANSWER-Proportional 3 fields used in MRI - ACCURATE ANSWER--static magnetic field -TVMF (gradient field) -RF field 3 main types of magnets used - ACCURATE ANSWER--Superconducting (most common_ -Resistive -Permanent FDA limits for the 3 fields in MRI - ACCURATE ANSWER-Static field: 2T TVMF: 3T/s RF field: - does not cause an increase in temperature of more than .5 deg C or any body part of 1 deg C -SAR does...

What is the name of the process that changes alternating current into direct current? correct answers Rectification What is the most accurate type of timer? correct answers Electronic Where in the x ray circuit is the timer circuitry located? correct answers Between the auto transformer and the step up transformer What is the advantage of three phase equipment over single phase equipment? correct answers Can achieve shorter exposure times The spinning top test can be used to determin...

Eddy currents are circulating electrical currents induced in conductive materials by: - Answer-an alternating magnetic field The method used to generate eddy currents in a test specimen by means of a coil can most closely be compared with the action of a: - Answer-transformer Electromagnetic testing relies on the principle of: - Answer-electromagnetic induction When the electrical current in an eddy current coil reverses direction, the: - Answer-direction of the eddy currents in the test p...

3B2 - Ultimate ABSA Study Guide test bank Chapter 1-15 | Complete Questions and Answers 100% Correct Solutions | Latest Update 2024 Turbine nozzles convert heat energy into: a. Potential energy. b. Enthalpy. c. Eddy-currents. d. Kinetic energy. e. Pressure. - Answer D Labyrinth seals are: 1. Made of cast iron. 2. A positive leak-proof seal arrangement. 3. Design to have large clearances between the shaft and casing. 4. Made of brass or stainless steel. 5. Used on larger diamet...

The ordinary direct current series motor does not operate satisfactorily with alternating current. One of the main reasons for this is a. excessive heating due to eddy currents in the solid parts of the field structure b. that the armature current and field current are out of phase with each other c. that the field flux lags 120 in time phase with respect to the line voltage d. excessive heating due to the low voltage drop in the series field correct answer: a. excessive heating due to e...

3B2 - Ultimate ABSA Study Guide C1-15 | 995 Questions | With All Correct Answers. Turbine nozzles convert heat energy into: a. Potential energy. b. Enthalpy. c. Eddy-currents. d. Kinetic energy. e. Pressure. D Labyrinth seals are: 1. Made of cast iron. 2. A positive leak-proof seal arrangement. 3. Design to have large clearances between the shaft and casing. 4. Made of brass or stainless steel. 5. Used on larger diameter turbine shafts. a. 1, 2. b. 2, 4, 5. c. 3, 4, 5. d. 4,...

black - man made green - vegetation over 6 feet white - vegetation under 6 feet blue - water brown - contour lines red - major roadways purple - new additions beam - the transverse measurement at a boat's widest part bracing stroke - any of several paddle strokes providing stability against the capsizing force of a lateral current; may also be used for turning broaching - the turning boatside of a boat due to the action of different currents at bow and stern channel - a canoeable rou...

Acoustic Emission Testing.. Acoustic Emission (AE) refers to the generation of transient elastic waves produced by a sudden redistribution of stress in a material. When a structure is subjected to an external stimulus (change in pressure, load, or temperature), localized sources trigger the release of energy, in the form of stress waves, which propagate to the surface and are recorded by sensors. With the right equipment and setup, motions on the order of picometers (10 -12 m) can be identifi...

Is SNR proportional or inversely proportional to voxel volume - ANSWERS-Proportional 3 fields used in MRI - ANSWERS--static magnetic field -TVMF (gradient field) -RF field 3 main types of magnets used - ANSWERS--Superconducting (most common_ -Resistive -Permanent FDA limits for the 3 fields in MRI - ANSWERS-Static field: 2T TVMF: 3T/s RF field: - does not cause an increase in temperature of more than .5 deg C or any body part of 1 deg C -SAR does not exceed 1W/kg avg over 25% o...

The ordinary direct current series motor does not operate satisfactorily with alternating current. One of the main reasons for this is a. excessive heating due to eddy currents in the solid parts of the field structure b. that the armature current and field current are out of phase with each other c. that the field flux lags 120 in time phase with respect to the line voltage d. excessive heating due to the low voltage drop in the series field - correct answer a. excessive heating due to e...