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40 Cards in this Set
- Front
- Back
The unit of electrical pressure is the : |
Volt |
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Each leg of line voltage only is typically represented by the: |
Two lines on the side of a ladder diagram |
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The damper used with a bypass humidifier must be open in what season: |
Winter |
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Capillary tubing should only be cut to length using a: |
Triangular or knife-edge file |
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A voltmeter is connected for taking voltage readings by connecting the voltmeter in (Series or Parallel) with the voltage to be measured: |
Parallel |
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The following is an example of a wet bulb thermometer: |
A conventional thermometer with a moistened cloth wick covering its sensor. |
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Electrical current is measured in: |
Amperes |
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What kind of process is Combustion: |
Chemical |
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A pictorial schematic is useful for: |
Quickly visualizing each component in a unit |
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A sling psychrometer can measure wet bulb and dry bulb temperatures: |
To compute measurements of relative humidity |
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The federal regulatory agency with jurisdiction over the shipping and labeling of refrigerants is: |
Department of Transportation (DOT) |
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As a general rule, a continuity check using an ohmmeter shows continuity by: |
A reading at zero or a specific resistance |
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An analog VOM is an electrical meter that displays: |
Volts, Ohms, or Milliamperes on an analog scale |
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A digital electrical multimeter marked "auto ranging" will automatically set itself for: |
A range of approximate value when set for volts, amps, or ohms |
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The input side of a step-down transformer is also properly called: |
The Primary Side |
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The meter setting a technician should use to determine whether or not a set of contacts are open in an energized circuit: |
Volt setting |
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Pictorial wiring diagrams generally show components in their: |
Approximate positions in the equipment |
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To change the direction of rotation of a fan driven by a three-phase induction motor: |
It is necessary to reverse the connections of only two motor leads |
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Lever type tubing benders are best used for: |
Soft drawn copper tubing |
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When possible, avoid working on a slate tile roof because: |
There is a high risk of slipping and falling on this type of roof. |
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The primary purpose for bringing outdoor air into a residential air distribution system is to: |
Provide fresh air to a conditioned space |
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Power is measured in: |
Watts |
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The following is proper for the care of hand tools: |
Clean and wipe them regularly |
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A Ground Fault Circuit Interrupter (GFCI) receptacle is a receptacle that is used to protect against: |
Electrical shocks from defective appliances and extension cords |
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A ceiling which slopes upward from the walls to the center of the room is referred to as a: |
Vaulted Ceiling |
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A slap is a type of residential flooring over what section of the residence: |
Crawl space |
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Operating sound is a consideration in the location of a heating unit because: |
Excessive noise could be disruptive to the customer.
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3.41 BTU of heat is created by: |
1 Watt |
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A technician should measure resistance with a digital ohmmeter by: |
Disconnecting the power, electronically isolate the load, connect leads across the loads |
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What is a method of heat transfer that does NOT require fluids or solids: |
Radiation |
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The following is an example of a wet bulb thermometer: |
A conventional thermometer with a moistened cloth wick covering its' sensor |
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The temperature at which water vapor condenses is called: |
The dew point |
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A tool specifically made to thread a hole in metal is a: |
Tap |
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The frame of an electric motor is grounded to: |
Maintain the frame at a zero potential |
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When making a flare, the height of the tubing above the flaring block is critical because: |
A flare with too much height will not fit into the flare nut |
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Sheathing is used over roof beams or rafters as a: |
Base for the roofing |
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A class C fire extinguisher is used to extinguish: |
Electrical fires |
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What unit is Sound level measured in: |
Decibels |
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Construction fall protection is required whenever working over a minimum of how high: |
4 feet |
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Refrigerant vapors in high concentrations should not be inhaled sense they:
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May cause heart irregularities or unconsciousness.
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