ATT FC Assessment Test Questions with
Complete Solutions
2 Categories of Rotating Machinery - Answer-Motors and Generators
All rotating machinery have these: - Answer-Rotating Shaft Mechanical in Electrical out
Why is AC Motor so popular? - Answer-Readily Available
Twisting Action - Answer-Torque
How is torque related to CEMF? - Answer-Inversely
Starting Current for DC Series motor is (greater/less) than for DC shunt - Answer-
Greater
Generates Rotor Current in an AC induction motor - Answer-Stator Magnetic Field
Has characteristics of both a series and/or shunt motor - Answer-compound motor
How is load proportional to RPM? CEMF? Armature Current? Torque? - Answer-
Inversely, Inversely, Directly, Directly
How is rotor speed proportional to CEMF? Torque? - Answer-Directly, Indirectly
DC motor converts (energy type) to (energy type) - Answer-Electric DC Voltage to
Mechanical
Torque is maximum when rotor is - Answer-Locked
AC motor input has 2 characteristics. What are they? - Answer-AC, Sinusoidal Wave
Machinery that converts electrical energy to mechanical energy - Answer-Motor
Machinery that converts mechanical energy to electrical energy - Answer-Generator
Motor Principle of magnetism - Answer-Attraction and Repulsion
Generator principle of magnetism - Answer-Pass conductor through magnetic field
Magnetic principle where a generator powers its own stators while generating output -
Answer-Retentivity
Principle of AC induction motor operation - Answer-Induction
, If schematic shows a field coil the motor is - Answer-Electromagnetic
If schematic does not show a field coil the motor is - Answer-Permanent Magnet
2 Components of a motor are - Answer-Poles and armatures
Starting torque of a series motor is (greater/less) than a compound motor - Answer-
Greater
In PWM, the greater the "on" time, the (slower/faster) the motor speed - Answer-faster
AC motors can be how many phases? - Answer-3
AC Generator, output reverses phase each (?) Degrees of rotation? - Answer-180
In a generator, how is output voltage proportional to shaft speed? - Answer-Directly
What type of DC motor has armature current=field current and Vin=Vcoil-armature -
Answer-Series
Used for large HP/special purpose applications - Answer-Synchronous
How many types of compound motors? - Answer-2
Describes ratio of "on" time to "off" time - Answer-Duty Cycle
Loaded DC motor needs (greater/less) DCV to maintain output voltage - Answer-
Greater
Rotational Rate (RR)= - Answer-Shaft Speed
How is RR proportional to applied voltage? - Answer-Directly
Output power equation for DC shunt motor - Answer-SpeedxTorquex.0147
What causes DC compound motor to lose armature magnetic field? - Answer-Opposing
series
What causes DC compound motor to gain armature magnetic field? - Answer-Adding
Series
What is difference between 1 phase and 2 phase full step generator? - Answer-Input
data on time
How is field coil oriented to armature in a DC Shunt motor? - Answer-Parallel
Complete Solutions
2 Categories of Rotating Machinery - Answer-Motors and Generators
All rotating machinery have these: - Answer-Rotating Shaft Mechanical in Electrical out
Why is AC Motor so popular? - Answer-Readily Available
Twisting Action - Answer-Torque
How is torque related to CEMF? - Answer-Inversely
Starting Current for DC Series motor is (greater/less) than for DC shunt - Answer-
Greater
Generates Rotor Current in an AC induction motor - Answer-Stator Magnetic Field
Has characteristics of both a series and/or shunt motor - Answer-compound motor
How is load proportional to RPM? CEMF? Armature Current? Torque? - Answer-
Inversely, Inversely, Directly, Directly
How is rotor speed proportional to CEMF? Torque? - Answer-Directly, Indirectly
DC motor converts (energy type) to (energy type) - Answer-Electric DC Voltage to
Mechanical
Torque is maximum when rotor is - Answer-Locked
AC motor input has 2 characteristics. What are they? - Answer-AC, Sinusoidal Wave
Machinery that converts electrical energy to mechanical energy - Answer-Motor
Machinery that converts mechanical energy to electrical energy - Answer-Generator
Motor Principle of magnetism - Answer-Attraction and Repulsion
Generator principle of magnetism - Answer-Pass conductor through magnetic field
Magnetic principle where a generator powers its own stators while generating output -
Answer-Retentivity
Principle of AC induction motor operation - Answer-Induction
, If schematic shows a field coil the motor is - Answer-Electromagnetic
If schematic does not show a field coil the motor is - Answer-Permanent Magnet
2 Components of a motor are - Answer-Poles and armatures
Starting torque of a series motor is (greater/less) than a compound motor - Answer-
Greater
In PWM, the greater the "on" time, the (slower/faster) the motor speed - Answer-faster
AC motors can be how many phases? - Answer-3
AC Generator, output reverses phase each (?) Degrees of rotation? - Answer-180
In a generator, how is output voltage proportional to shaft speed? - Answer-Directly
What type of DC motor has armature current=field current and Vin=Vcoil-armature -
Answer-Series
Used for large HP/special purpose applications - Answer-Synchronous
How many types of compound motors? - Answer-2
Describes ratio of "on" time to "off" time - Answer-Duty Cycle
Loaded DC motor needs (greater/less) DCV to maintain output voltage - Answer-
Greater
Rotational Rate (RR)= - Answer-Shaft Speed
How is RR proportional to applied voltage? - Answer-Directly
Output power equation for DC shunt motor - Answer-SpeedxTorquex.0147
What causes DC compound motor to lose armature magnetic field? - Answer-Opposing
series
What causes DC compound motor to gain armature magnetic field? - Answer-Adding
Series
What is difference between 1 phase and 2 phase full step generator? - Answer-Input
data on time
How is field coil oriented to armature in a DC Shunt motor? - Answer-Parallel
