Type of DC Motors
Load Requirements(Math)
Troubleshooting
Components
Random
100
What motor has the armature and field in parallel?
What is a shunt motor?
100
How much work is required to carry a 50lb bag of groceries vertically from the street level to the fourth floor of a building 30' above the street level?
What is 1,500lb-ft?
100
What instrument checks insulation?
What is a megohmmeter?
100
What is component is the sliding contact that rides against the commutator segments and is used to connect the armature to the external circuit?
What is a brush?
100
What kind of motor uses direct current through a field and armature to produce shaft rotation?
What is a DC motor?
200
What characteristics are combined in a compound motor?
What are high start speed and constant speed?
200
What is the torque produced by a 60lb force pushing on a 4' lever arm?
What is 240lb-ft?
200
What component wears faster than any other component?
What are brushes?
200
What are the rotating windings called?
What is an armature?
200
What is the rotating force of a motor called?
What is torque?
300
What motor uses magnets instead of a winding for the field poles?
What is a DC Permanent Magnet Motor?
300
What is the relationship between speed and horsepower if torque remains the same?
What is proportional?
300
What are the steps to check if you have a grounded circuit?
What are connect one lead of a continuity tester to the frame of the motor and touch the other lead to the motor leads(A1 an A2). If it is a grounded circuit, the continuity tester will beep.
300
What are stationary windings called?
What are field windings?
300
What does pure DC power from a battery generator look like?
What is a straight line?
400
What are the 4 types of DC motors?
What are series, shunt, compound and permanent magnet motors?
400
How much work is performed when lifting a 1152oz box from the floors to the top of a 36in high platform?
hint: 1pound = 16oz
What is 216lb-ft
400
Which motor winding usually has a higher resistance than the motor's armature winding?
What is a shunt field?
400
What is used to adjust the speed of a shunt motor?
What is a rheostat?
400
What does a full-wave DC power from a rectified AC power supply look like?
What are bumps?
500
How are the components(armature, windings, etc) in compound motor connected?
The armature is in series with the series coil and the shunt field is in parallel with that.
500
What is the horsepower of a 1725 rpm motor with a full-load torque of 3.1lb-ft with an added 25% output capability?
hint: ((x * y)/5252) * z
What is 1.25 HP?
500
What are the markings for an armature, series field and shunt field?
What are A1 and A2, S1 and S2, and F1 and F2?
500
What component connects the brushes to the power supply?
What is a pigtail?
500
What three factors determine the amount of force exerted on a conductor in a magnetic field?
What are intensity of the magnetic field, the current through the conductor and length of conductor?