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Lesson 2-2-1
| Question | Answer |
|---|---|
| All of the units of measure are defined in compared to the four basic measurements: length, weight, time, and ____. | Temperature |
| The romans refined distance traveled to a unit of length, the ____. | Mile |
| The basic subunit of the ancient Egyptians royal cubit stone is the span. True or false? | False |
| The meter was defined as 1/10,000,000 of the distance of the meridian passing through ___ from the North Pole to the equator. | Paris |
| Why is mass used as a standard instead of weight? | Weight differs with the pull of gravity |
| The Babylonians believed the year consisted of 360 days.The 360 day year led to fractions such as 1/60 which are still used in astronomy and for the minutes and seconds of the day. True or false? | True |
| The metric system adopted the ___ as the standard unit of time measurement. | Second |
| What are both the Fahrenheit and Celsius temperature scaled based on? | They are based on the freezing and boiling points of water |
| What happens to a substance at absolute zero, or 0 kelvin? | All molecules are at absolute rest with no motion |
| A ___ signal word is a word used to indicate a potentially hazardous situation which, if not avoided, could result in death or serious injury. | Warning |
| A(n) ___ warning signal word is a word used to indicate a high voltage location and conditions that could result in | Electrical |
| Always ensure that the jack position of the test leads corresponds to the setting of the meter function and selector switch before taking a measurement. True or false? | True |
| What is the main reason meter fuses blow (when the meter has fuses) and the ends of test leads become burnt. | Connecting the test leads of a test instrument or meter to the amperage jacks and setting the function and selector switches to a voltage measurement position for measurement |
| Only a meter marked ___ can be used when taking a measurement on a circuit that includes solid-state components that distort the shape of AC sine waves (motor drives, PLCs, computers, and printers). | True RMS |
| What is the main reason for the increase in the use of digital electronic technology? | Is that digital meters have far greater measuring capabilities than analog meters, in a much smaller space. |
| The ___ feature on a digital multimeter allows a meter to automatically adjust to a higher range setting if the set range is not high enough for | Autoranging |
| Digital test instruments are less susceptible to noise than analog test instruments. True or false | False |
| Analog test instruments are less accurate than digital test instruments. True or false | True |
| When using a test instrument with test leads, in what order should the leads be connected? | Black first (the ground test lead) and red second (the voltage lead next) |
| For maximum safety, personnel protective equipment and safety requirements for test instrument procedures must be followed as specified in ___. | All the above (NFPA 70E, OSHA standard part 1910, other applicable safety mandates) |
| The primary purpose of rubber insulating gloves and leather protectors is to insulate hands and lower arms from possible contact with live conductors. True or false | True |
| ___ are an eye protection device with special impact-resistant glass or plastic lenses, reinforced frames, and side shields. | Safety glasses |
| A(n) ___ is an explosion that occurs when the air surrounding electrical equipment becomes ionized and conductive. | Arc blast |
| Electricity is the number one cause of fires. True or false | True |
| Never touch any part of an electrical shock victims body when it is in contact with the circuit. When the circuit cannot be turned off, use any ___ device to free the person. | Nonconducting |
| Grounding is the connection of all exposed non-current-carring metal parts to the neutral conductor. True or false | False |
| ___ is the process of removing the source of electrical power and installing a lock that prevents the power from being turned on. | Lockout |
| Who can remove a lockout/tag out ? | The authorized person who installed the lockout / tagout, except in an emergency |
| A(n) ___ is an extremely high - temperature discharge produced by an electrical fault in the air. | Arc flash |
| Why must clothing made of synthetic materials never be worn when working with energized electrical circuits? | Can burn and melt to the skin |
| The ___ is a federal act that requires all employers to provide a safe environment for employees. | OSH Act |
| The life expectancy of a test instrument depends on how ___? | All the above ( the meter is used, the meter is taken care of, well the meter is made) |
| Extra care must be provided to digital test instruments because their movements are susceptible to damage from shock. True or false | False |
| The resistance of test leads must be less than ___ ohms? | 1 ohm |
| How should test instruments be tested for accuracy? | At a minimum, test instrument measurement must be tested against a known measurement value and against another instrument of the same type. |
| Identify the signal word with the appropriate symbol in the illustration. | B is danger D is warning E is caution A is electrical warning C is explosion warning |
| Identify the type of personal protective equipment with the appropriate item in the illustration. | C is leather protection gloves A is protective helmet F is arc face shield D is rubber insulating gloves G is ear plugs B is safety glasses E is flame resistant clothing |
| Identify the lockout /tagout equipment with the appropriate item in the illustration. | A is multiple lockouts D is locks B is reusable danger tag C is tag ties |
Created by:
swcurtis