STUDENTS WRITTEN TEST
INSTRUCTORS NOTES;
This test is to be given on the completion of the course, The Instructor is to arrange the students so that no student is sitting directly behind another student, or sitting directly across from another student. No student is to leave the classroom once the test has started and no student is to have a cell phone visible during the test, if you are caught with a cell phone out then your test will be taken from you and you will receive a failing grade for the course. This test duration is 2hours maximum; at the end of the time period the Instructor is to collect all tests and to grade them.
This test is to be given on the completion of the course, The Instructor is to arrange the students so that no student is sitting directly behind another student, or sitting directly across from another student. No student is to leave the classroom once the test has started and no student is to have a cell phone visible during the test, if you are caught with a cell phone out then your test will be taken from you and you will receive a failing grade for the course. This test duration is 2hours maximum; at the end of the time period the Instructor is to collect all tests and to grade them.
Student's
Final TEST:
Please circle the correct answer:
1. __________ is a twisting or turning force.
A. inertia
B. Momentum
C. Torque
D. Horsepower
2. One horsepower is _________________ 1 kilowatt
A. Less than
B. Greater than
C. Equal to
D. All of the above
3. The _____________ is the stationary part of an A.C. motor’s electromagnetic circuit.
A. Rotor
B. Stator
C. Electromagnetic field
D. End housing
4. The ____________ protects the internal parts of the motor from water and other hazards.
A. Rotor
B. Stator
C. Enclosure
D. Laminations
5. The ___________ rotor is the most common type of rotor used in three phase A.C. motors.
A. Permanent magnetic
B. Wound
C. Squirrel cage
D. Slotted steel
6. To reverse the rotation of a three phase motor you would;
A. Remove one power lead.
B. Inter - change any two main leads.
C. Change over current device size.
D. Change frequency of power source.
7. A motor that is making more noise than normal probably has the following problem.
A. Improper phasing of leads.
B. Faulty overload.
C. Worn bearings.
D. Single phasing.
8. What device is used to test the insulation of a motor?
A. Voltmeter
B. Ohmmeter
C. Amp meter
D. Mega ohm meter
9. If a three phase motor is running and you lose one phase, what happens to the motor?
A. The motor speeds up.
B. The motor slows down.
C. The motor stops.
D. The motor reverses direction.
10. The main parts of a three phase squirrel cage induction motor are;
A. Bell ends, rotor, stator windings, test leads.
B. Rotor, stator windings, bell ends, housing and communitator.
C. Stator windings, rotor, housing, bearings, fan and bell ends.
D. Stator windings, housing, rotor, centrifugal switch, bearings and fan
11. When a squirrel cage induction motor is started the value of the starting current is;
A. Equal to the running current
B. Smaller than the running current
C. Half the running current
D. Several times the running current
12. The squirrel cage induction rotor is constructed of _______ and end _____ embedded in steel laminations.
A. bars, bars
B. rings, rings
C. bars, rings
D. rings, bars
13. If one phase of voltage to a three phase motor opens, the motor may slow down, overheat, or possibly stop. This condition is known as;
A. double phasing
B. single phasing
C. triple phasing
D. free running
14. The rotor is supported by
A. End bells
B. Housing
C. Stator
D. Bearings
15. The three phases of a motor are usually labelled.
A. A, B, C
B. C, B ,A
C. 1, 2, 3
D. L3, L2, L1
16. An Electric Motor converts ______ power to ________ power.
A. Mechanical, Mechanical
B. Mechanical, Electrical
C. Electrical, Electrical
D. Electrical, Mechanical
17. An Induction Motor is sometimes referred to as a _________ Motor.
A. Synchronous
B. Reversing
C. Asynchronous
D. Auto-Reversing
18. _____________ is the basic principal behind motor operation.
A. Reduction
B. Induction
C. Inducing
D. Deduction
19. Before starting any type of maintenance on a motor you should do a_________ inspection.
A. Walk By
B. Hand
C. Tool
D. Visual
20. An Electric Research Institute study indicates that_______% of electrical motor failures are caused by mechanical components,
A. 53
B. 55
C. 57
D. 52
21. Too much grease can cause __________________ bearings.
A. Noisy
B. Racing
C. Sluggish
D. Overheating
22. To find the specifications of a motor you would check___________________.
A. With the supplier
B. With the salesperson
C. With the engineer
D. The nameplate
23. The shaft of a typical shop motor will rotate at either ________ or _______ RPM`s.
A. 1725, 3450
B. 1750, 3460
C. 1700, 3400
D. 1775, 3475
24. To test a new motor a Megger test of _________ seconds to one minute is usually sufficient.
A. 20
B. 30
C. 35
D.40
25. An older motor with no test history a _________ minute test is required to understand the true condition of the motor.
A. 5
B. 15
C. 10
D. 20
A. Mechanical, Mechanical
B. Mechanical, Electrical
C. Electrical, Electrical
D. Electrical, Mechanical
17. An Induction Motor is sometimes referred to as a _________ Motor.
A. Synchronous
B. Reversing
C. Asynchronous
D. Auto-Reversing
18. _____________ is the basic principal behind motor operation.
A. Reduction
B. Induction
C. Inducing
D. Deduction
19. Before starting any type of maintenance on a motor you should do a_________ inspection.
A. Walk By
B. Hand
C. Tool
D. Visual
20. An Electric Research Institute study indicates that_______% of electrical motor failures are caused by mechanical components,
A. 53
B. 55
C. 57
D. 52
21. Too much grease can cause __________________ bearings.
A. Noisy
B. Racing
C. Sluggish
D. Overheating
22. To find the specifications of a motor you would check___________________.
A. With the supplier
B. With the salesperson
C. With the engineer
D. The nameplate
23. The shaft of a typical shop motor will rotate at either ________ or _______ RPM`s.
A. 1725, 3450
B. 1750, 3460
C. 1700, 3400
D. 1775, 3475
24. To test a new motor a Megger test of _________ seconds to one minute is usually sufficient.
A. 20
B. 30
C. 35
D.40
25. An older motor with no test history a _________ minute test is required to understand the true condition of the motor.
A. 5
B. 15
C. 10
D. 20
