Identi Flashcards
What is the type of winding that has two conductors or two sides per slot arranged in two layers?
TWO-LAYER WINDING
What are generators whose field magnets are energized by the generators themselves due to residual magnetism?
SELF-EXCITED GENERATORS
What is the rotating machine used for converting mechanical energy to electrical energy or vice versa?
DYNAMO
What is the machine that drives the generator?
PRIME MOVER
What is a low resistance path connected in parallel with the series field coil to vary the compounding of the generator?
DIVERTER
What is the induced emf in the armature of a motor that is opposite to the impressed voltage driving current in the armature conductors?
BACK EMF
What type of motor contains field windings composed of many turns of wire connected in parallel with the armature?
SHUNT WOUND MOTOR
What describes the change in speed of a motor as a load is placed upon it, with other conditions remaining constant?
SPEED REGULATION
What is the method to bring a motor and its load quickly to rest?
ELECTRIC BRAKING
What is the term for the turning or twisting amount of a force about an axis, measured by the product of the force and the radius at which the force acts?
TORQUE
What is the magnetic stress in a magnetic circuit that tends to establish a magnetic field?
MAGNEMOTIVE FORCE
What is the property of a magnetic material that opposes the establishment and maintenance of a magnetic flux?
RELUCTANCE
What is the reciprocal of permeability that corresponds to resistivity?
RELUCTIVITY
What represents the direction of the current?
MIDDLE FINGER
What is used to determine the direction of the force acting on the conductor?
FLEMMINGS LEFT HAND RULE
What is the ability of a material to conduct magnetic flux through it?
PERMEABILITY
What is the region outside the magnet in which its poles experience the force of attraction or repulsion?
MAGNETIC FIELD
What are the regions on the body of the magnet in which its magnetic power is said to exist?
MAGNETIC POLES
What is the number of magnetic lines of force per unit of area through any substance in a plane at right angles to the direction of the field?
MAGNETIC FLUX DENSITY
What is the branch of engineering that deals with the magnetic effects of electric current?
ELECTROMAGNETISM
What are the reasons for connecting generators in parallel?
- to provide continuity of service
- to improve plant efficiency
- to conduct maintenance and repair
- for future load growth
What are the requirements for the parallel operation of DC generators?
- same polarity
- same armature speed
- same terminal voltage
What are the methods of electric braking?
- Rheostatic or Dynamic Braking
- Plugging or Reverse Current Braking
- Regenerative Braking
