Start Practice Exam Test Questions
Choose the letter of the best answer in each questions.
1. Matter can be found in which of the following forms?
- A. Solid
- B. Liquid
- C. Gaseous
- D. Each of the above
2. A substance that CANNOT be reduced to a simpler substance by chemical means is called a/an
- A. element
- B. mixture
- C. compound
- D. solution
3. A molecule is the smallest possible particle that retains the characteristic of which of the following substances?
- A. An element
- B. A mixture
- C. A compound
- D. A solution
4. An atom is the smallest possible particle that retains the characteristic of which of the following substances?
- A. An element
- B. A mixture
- C. A compound
- D. A solution
5. What subatomic particle has a negative charge and a small mass?
- A. Proton
- B. Electron
- C. Positron
- D. Neutron
6. What subatomic particle has a positive charge and a large mass?
- A. Proton
- B. Electron
- C. Positron
- D. Neutron
7. What subatomic particle has no charge?
- A. Proton
- B. Electron
- C. Positron
- D. Neutron
8. When light is represented as a tiny packet of energy, what are these packets of energy called?
- A. Angstroms
- B. Photons
- C. Wavelengths
- D. Frequencies
9. If light energy collides with an orbiting electron, what happens to the electron?
- A. The electron will move around the same orbit faster
- B. The electron will jump to an orbit further from the nucleus
- C. The electron will jump to an orbit closer to the nucleus
- D. The electron will merge with the nucleus
10. After the action described in question 9 occurs, the electron will return to the condition it had before being acted upon by the light. When the electron returns to this condition, which of the following actions occurs?
- A. The nucleus becomes lighter
- B. The atom becomes an ion
- C. Light energy is emitted
- D. The valence of the atom changes
11. The number of electrons in the outermost shell of an atom determines which of the following characteristics of the atom?
- A. Valence
- B. Atomic weight
- C. Atomic number
- D. Number of shells
12. When an atom gains or loses an electron, which of the following terms applies?
- A. Unbalanced
- B. Lightened
- C. Neutral
- D. Ionized
13. What is the main difference between conductors, semiconductors, and insulators?
- A. The temperature differences
- B. The physical state of their mass
- C. The number of free electrons
- D. The designations of the outer shells
14. A substance with an excess of electrons is considered to be in what electrical state?
- A. Neutral
- B. Positive
- C. Negative
- D. Discharged
15. Which of following actions describes the easiest way to accumulate a static electric charge?
- A. Friction between two conductors
- B. Friction between two insulators
- C. Pressure between two conductors
- D. Pressure between two insulators
16. An atom that contains 6 protons and 5 electrons has what electrical charge?
- A. Positive
- B. Negative
- C. Neutral
- D. Intermediate
17. How do "like" and "unlike" charges react to one another?
- A. Unlike charges repel each other, like charges repel each other
- B. Unlike charges attract each other, like charges attract each other
- C. Unlike charges repel each other, like charges attract each other
- D. Unlike charges attract each other, like charges repel each other
18. What is/are the term(s) applied to the space between and around charged bodies in which their influence is felt?
- A. Electric field of force
- B. Electrostatic field
- C. Dielectric field
- D. Each of the above
19. Electrostatic lines of force are drawn in which of the following manners?
- A. Entering negative charge, entering positive charge
- B. Entering negative charge, leaving positive charge
- C. Leaving negative charge, leaving positive charge
- D. Leaving negative charge, entering positive charge
20. Which of the following devices use magnetism?
- A. Batteries
- B. Light bulbs
- C. High-fidelity speakers
- D. Each of the above
21. Magnetic materials have which of the following qualities?
- A. They are attracted by magnets
- B. They can be magnetized
- C. Both A and B above
- D. They are electrical insulators
22. Ferromagnetic materials have which of the following qualities?
- A. They are all alloys
- B. They all contain nickel
- C. They make very weak magnets
- D. They are relatively easy to magnetize
23. A material with low reluctance and high permeability such as iron or soft steel is used to make what type of magnet?
- A. Temporary
- B. Permanent
- C. Residual
- D. Natural
24. The ability of a material to retain magnetism is called
- A. permeability
- B. retentivity
- C. reluctance
- D. ionization
25. The law of magnetic poles states which of the following relationships?
- A. Like poles attract, unlike poles attract
- B. Like poles attract, unlike poles repel
- C. Like poles repel, unlike poles repel
- D. Like poles repel, unlike poles attract
26. The north indicating pole of a compass needle is attracted to which of the following poles of the earth?
- A. The geographic north pole
- B. The magnetic north pole
- C. The geographic south pole
- D. The magnetic south pole
27. Weber's theory of magnetism assumes that magnetic material is composed of
- A. tiny molecular magnets
- B. domains of magnetic influence
- C. large blocks of material acting as magnets
- D. atoms with electrons spinning different directions
28. According to the domain theory, if an atom with 26 electrons has 20 electrons spinning counterclock-wise, the atom is considered to be
- A. charged
- B. insulated
- C. neutralized
- D. magnetized
29. If a glass plate is placed over a magnet and iron filings are sprinkled over the glass, a pattern will be visible. What does this pattern indicate?
- A. The magnetic field
- B. The electrostatic field
- C. The piezoelectric effect
- D. The chemical reaction of the magnet and the filings
30. An imaginary line used to illustrate a magnetic effect is known as a/an
- A. magnetic pole
- B. force field pole
- C. magnetic line of force
- D. electrostatic line of force
31. Which of the following is NOT a property of magnetic lines of force?
- A. They form closed loops around the magnet
- B. They leave the magnetic material at right angles to the surface
- C. They cross each other at right angles
- D. They leave the north pole and enter the south pole of the magnet
32. A magnetic shield or screen used to protect a delicate instrument should be made of which of the following materials?
- A. Plastic
- B. Copper
- C. Soft iron
- D. Aluminum
33. Bar magnets should be stored in which of the following manners?
- A. Separately
- B. In pairs at 90 degree angles
- C. In pairs with north poles together
- D. In pairs with a north pole and a south pole together
34. What is the term applied to the ability to do work?
- A. Power
- B. Energy
- C. Voltage
- D. Current
35. An object that is in motion has what type of energy?
- A. Kinetic
- B. Magnetic
- C. Newtonian
- D. Potential
36. A book sitting on a shelf has what kind of energy?
- A. Kinetic
- B. Potential
- C. Newtonian
- D. Magnetic
37. Which of the following term(s) apply(ies) to the difference of potential between two bodies?
- A. Voltage
- B. Electromotive force
- C. Both A and B above
- D. Current
38. Which of the following terms is equal to "2.1 kV?"
- A. 210 V
- B. 2100 V
- C. 21,000 V
- D. 2.1 x 106 V
39. 250 µV is equal to which of the following terms?
- A. 0.25 mV
- B. 0.00025 V
- C. 250 x 10-6 V
- D. All of the above
40. What is the general term that describes a device which supplies a voltage?
- A. A voltage source
- B. A voltage supply
- C. A voltage generator
- D. A voltage producer
41. In addition to friction, magnetism, and chemical action, which of the following methods can be used to produce a voltage?
- A. Pressure
- B. Heat
- C. Light
- D. Each of the above
IN ANSWERING QUESTIONS 42 THROUGH 46, MATCH THE VOLTAGE PRODUCING METHOD LISTED IN COLUMN B TO THE DEVICE LISTED IN COLUMN A.
COLUMN A
42. Radio receiver's oscillator
43. Thermocouple
44. Automobile battery
45. Automobile generator
46. Flashlight cell
COLUMN B
- A. Heat
- B. Pressure
- C. Magnetism
- D. Chemical action
47. Current in an electric circuit is caused by which of the following actions?
- A. Electrons moving from negative to positive
- B. Electrons moving from positive to negative
- C. Protons moving from negative to positive
- D. Protons moving from positive to negative
48. When directed drift takes place, at what speed does the effect take place?
- A. 100,000 miles per hour
- B. 186,000 miles per second
- C. 300,000 meters per hour
- D. 500,000 meters per second
49. If the voltage in a circuit increases, what happens to the current?
- A. Current increases
- B. Current decreases
- C. Current remains the same
- D. Current fluctuates rapidly
50. Which of the following values is equal to 100mA?
- A. 1.0 ampere
- B. 10.0 amperes
- C. 0.10 ampere
- D. 0.01 ampere
51. What symbol is used to represent the ohm?
- A. A
- B. O
- C. µ
- D. Ω
52. If low weight is the major factor, which of the following materials should be used as a conductor?
- A. Aluminum
- B. Copper
- C. Silver
- D. Gold
53. What material is MOST widely used as a conductor in electrical equipment?
- A. Aluminum
- B. Copper
- C. Silver
- D. Gold
54. Resistance of a conductor will increase with which of the following changes to the cross-sectional area and length of the conductor?
- A. Cross-sectional area is increased, length is increased
- B. Cross-sectional area is increased, length is decreased
- C. Cross-sectional area is decreased, length is increased
- D. Cross-sectional area is decreased, length is decreased
55. A material whose resistance decreases as the temperature increases has what temperature coefficient?
- A. Positive
- B. Negative
- C. Zero
- D. Neutral
56. A material whose resistance remains constant as the temperature increases has what temperature coefficient?
- A. Positive
- B. Negative
- C. Zero
- D. Neutral
57. Which of the following units is NOT a unit of conductance?
- A. Siemens
- B. S
- C. G
- D. Ohm
58. Resistance bears which, if any, of the following relationships to conductance?
- A. A direct relationship
- B. A reciprocal relationship
- C. An inverse square relationship
- D. None
59. Which of the following schematic symbols is used to represent a resistor?
60. How is the ability of a resistor to dissipate heat indicated?
- A. By the wattage rating
- B. By the voltage rating
- C. By the resistance rating
- D. By the tolerance
61. Carbon resistors have which of the following disadvantages?
- A. A high cost factor
- B. An extremely large physical size
- C. The resistance value changes with age
- D. A limited range of resistance values
62. Which of the following types of resistors will overcome the disadvantages of a carbon resistor?
- A. Rheostat
- B. Potentiometer
- C. Molded composition
- D. Wirewound resistor
63. What is the total number of connections on
(a) a rheostat and (b) a potentiometer?
- A. (a) Two (b) two
- B. (a) Two (b) three
- C. (a) Three (b) two
- D. (a) Three (b) three
64. Which, if any, of the following types of variable resistors is used to control a large amount of current?
- A. Rheostat
- B. Potentiometer
- C. Wirewound potentiometer
- D. None of the above
65. A carbon resistor is color-coded orange, orange, orange. What is the resistance value of this resistor?
- A. 2.2 kΩ
- B. 3.3 kΩ
- C. 33.0 kΩ
- D. 440.0 kΩ
66. What are the allowable limits of ohmic value in a resistor color coded blue, green, yellow, gold?
- A. 682.5 kΩ to 617.5 kΩ
- B. 715.0 kΩ to 585.0 kΩ
- C. 7.98 MΩ to 7.22 MΩ
- D. 8.36 MΩ to 6.84 MΩ
67. Of the following, which color of the fifth band on a resistor indicates the LEAST chance of failure?
- A. Red
- B. Brown
- C. Yellow
- D. Orange
IN ANSWERING QUESTIONS 68 THROUGH 70, REFER TO FIGURE 1A.
Figure 1A.—Resistor with color coding.
68. What is the ohmic value of the resistor?
- A. 8 Ω
- B. 79 Ω
- C. 790 Ω
- D. 800 Ω
69. What is the specified tolerance of the resistor?
- A. 1%
- B. 5%
- C. 10%
- D. 20%
70. What is the specified reliability of the resistor?
- A. 1.0%
- B. 0.1%
- C. 0.01%
- D. 0.001%
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