Electrical Theory
Electrical Theory
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Question 1 |
The negatively charged particle of an atom is the?
A | Proton |
B | Electron |
C | Neutron |
D | Nucleus |
Question 2 |
The positively charged particle of an atom is the?
A | Proton |
B | Electron |
C | Neutron |
D | Nucleus |
Question 3 |
Like charged particles
A | Attract each other |
B | Repel each other |
C | Have a negative charge |
D | Have a positive charge |
Question 4 |
Which material would be the best conductor of electrons?
A | Glass |
B | Wood |
C | Air |
D | Copper |
Question 5 |
Which material would be the best insulator?
A | Aluminum |
B | Copper |
C | Rubber |
D | Gold |
Question 6 |
When a conductor is moved through a magnetic field,
A | Magnetism is increased |
B | Reactance is decreased |
C | Power supply is induced |
D | Frequency is reduced |
Question 7 |
Electrical pressure is measured in?
A | Amps |
B | Ohms |
C | Volts |
D | Watts |
Question 8 |
The symbol used for electrical pressure is?
A | E |
B | I |
C | R |
D | P
|
Question 9 |
Electron flow is measured in?
A | Amps |
B | Ohms |
C | Volts |
D | Watts |
Question 10 |
The symbol used for electron flow is?
A | E |
B | I |
C | R |
D | P |
Question 11 |
Electrical power is measured in?
A | Amps |
B | Ohms |
C | Volts |
D | Watts |
Question 12 |
The symbol used for electrical power is?
A | E |
B | I |
C | R |
D | P |
Question 13 |
Electrical resistance is measured in?
A | Amps |
B | Ohms |
C | Volts |
D | Watts |
Question 14 |
The symbol used for electrical resistance is
A | E |
B | I |
C | R |
D | P |
Question 15 |
What would happen to resistance of a wire if its length were doubled? It would
A | Stay the same |
B | Decrease by one half |
C | Be twice as great |
D | Become four times as great |
Question 16 |
A millivolt is best expressed as
A | 1,000 volts |
B | 100 volts |
C | 1/1,000 of a volt |
D | 1/100 of a volt |
Question 17 |
microamp is best expressed as
A | 100,000amps |
B | 1,000,000 amps |
C | 1/100,000 of an amp |
D | 1/1,000,000 of an amp |
Question 18 |
A megaohm is best expressed as
A | 100,000 ohms |
B | 1,000,000 ohms |
C | 1/100,000 of an ohm |
D | 1/1,000,000 of an ohm |
Question 19 |
One amp is defined as
A | One coulomb per second |
B | One watt per second |
C | One volt multiplied by one ohm |
D | One watt divided by one ohm |
Question 20 |
Power is best described as
A | A large rate of inrush current |
B | The rate which electrons do work |
C | Amperage in an electrical circuit |
D | Resistance of the load in a circuit |
Question 21 |
One horsepower is the same as
A | 3,413 watts |
B | 3,143 watts |
C | 746 watts |
D | 3.143 watts |
Question 22 |
One watt is equivalent to
A | 3.413 btu |
B | 3,413 btu |
C | 746 btu |
D | 3.143 btu |
Question 23 |
One kilowatt is equal to
A | 3,413 btu |
B | 3,143 btu |
C | 1,000 btu |
D | 3.143 |
Question 24 |
When converting KW to Btu/h, the formula is
A | Volts X amps |
B | Watts X amps |
C | Watts X 3.413 |
D | Amps X 3.413 |
Question 25 |
All magnets have
A | Stator poles |
B | North and south poles |
C | Stator, north, and south poles |
D | Reversing poles |
Question 26 |
If a north pole of one magnet is placed near the north pole of another magnet, the poles will
A | Repel each other |
B | Attract each other |
C | There will be no effect |
D | A north pole does not exist on a magnet |
Question 27 |
What flows between the two ends of a magnet?
A | Current |
B | Voltage |
C | Electrical charges |
D | Lines of force |
Question 28 |
What is known as magnetic lines of force?
A | Flux |
B | Permeability |
C | Capacitance |
D | Eddy current |
Question 29 |
A permanent magnet is
A | A coil of wire that has current flowing through it. |
B | Magnetism created by induction |
C | A piece of material that has been magnetized |
D | Created by striking two pieces of soft iron material together |
Question 30 |
An electromagnet is produced by
A | Running a current through a coiled wire |
B | Running current through an iron core |
C | Moving an iron core through a coiled wire |
D | Moving a coiled wire over an iron core |
Question 31 |
How is magnetic field intensified in an electrical circuit?
A | By increasing the size of the conductor |
B | By decreasing the size of the conductor |
C | By adding more turns to the conductor |
D | By decreasing the turns in the conductor |
Question 32 |
When current flows through the conductor of a solenoid coil, what happens to the iron core?
A | It tries to move away from the magnetic field |
B | It tries to center itself in the magnetic field |
C | No action occurs in the iron core |
D | The magnetic tries to center itself around the iron core |
Question 33 |
What component uses magnetism for operation?
A | A pressure control |
B | An electric heating element |
C | A motor |
D | A thermal overload protector |
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