Nate Core 40 Specific Test Questions

Front 1

The unit of electrical pressure is the :

Back 1

Volt

Front 2

Each leg of line voltage only is typically represented by the:

Back 2

Two lines on the side of a ladder diagram

Front 3

The damper used with a bypass humidifier must be open in what season:

Back 3

Winter

Front 4

Capillary tubing should only be cut to length using a:

Back 4

Triangular or knife-edge file

Front 5

A voltmeter is connected for taking voltage readings by connecting the voltmeter in (Series or Parallel) with the voltage to be measured:

Back 5

Parallel

Front 6

The following is an example of a wet bulb thermometer:

Back 6

A conventional thermometer with a moistened cloth wick covering its sensor.

Front 7

Electrical current is measured in:

Back 7

Amperes

Front 8

What kind of process is Combustion:

Back 8

Chemical

Front 9

A pictorial schematic is useful for:

Back 9

Quickly visualizing each component in a unit

Front 10

A sling psychrometer can measure wet bulb and dry bulb temperatures:

Back 10

To compute measurements of relative humidity

Front 11

The federal regulatory agency with jurisdiction over the shipping and labeling of refrigerants is:

Back 11

Department of Transportation (DOT)

Front 12

As a general rule, a continuity check using an ohmmeter shows continuity by:

Back 12

A reading at zero or a specific resistance

Front 13

An analog VOM is an electrical meter that displays:

Back 13

Volts, Ohms, or Milliamperes on an analog scale

Front 14

A digital electrical multimeter marked "auto ranging" will automatically set itself for:

Back 14

A range of approximate value when set for volts, amps, or ohms

Front 15

The input side of a step-down transformer is also properly called:

Back 15

The Primary Side

Front 16

The meter setting a technician should use to determine whether or not a set of contacts are open in an energized circuit:

Back 16

Volt setting

Front 17

Pictorial wiring diagrams generally show components in their:

Back 17

Approximate positions in the equipment

Front 18

To change the direction of rotation of a fan driven by a three-phase induction motor:

Back 18

It is necessary to reverse the connections of only two motor leads

Front 19

Lever type tubing benders are best used for:

Back 19

Soft drawn copper tubing

Front 20

When possible, avoid working on a slate tile roof because:

Back 20

There is a high risk of slipping and falling on this type of roof.

Front 21

The primary purpose for bringing outdoor air into a residential air distribution system is to:

Back 21

Provide fresh air to a conditioned space

Front 22

Power is measured in:

Back 22

Watts

Front 23

The following is proper for the care of hand tools:

Back 23

Clean and wipe them regularly

Front 24

A Ground Fault Circuit Interrupter (GFCI) receptacle is a receptacle that is used to protect against:

Back 24

Electrical shocks from defective appliances and extension cords

Front 25

A ceiling which slopes upward from the walls to the center of the room is referred to as a:

Back 25

Vaulted Ceiling

Front 26

A slap is a type of residential flooring over what section of the residence:

Back 26

Crawl space

Front 27

Operating sound is a consideration in the location of a heating unit because:

Back 27

Excessive noise could be disruptive to the customer.

Front 28

3.41 BTU of heat is created by:

Back 28

1 Watt

Front 29

A technician should measure resistance with a digital ohmmeter by:

Back 29

Disconnecting the power, electronically isolate the load, connect leads across the loads

Front 30

What is a method of heat transfer that does NOT require fluids or solids:

Back 30

Radiation

Front 31

The following is an example of a wet bulb thermometer:

Back 31

A conventional thermometer with a moistened cloth wick covering its' sensor

Front 32

The temperature at which water vapor condenses is called:

Back 32

The dew point

Front 33

A tool specifically made to thread a hole in metal is a:

Back 33

Tap

Front 34

The frame of an electric motor is grounded to:

Back 34

Maintain the frame at a zero potential

Front 35

When making a flare, the height of the tubing above the flaring block is critical because:

Back 35

A flare with too much height will not fit into the flare nut

Front 36

Sheathing is used over roof beams or rafters as a:

Back 36

Base for the roofing

Front 37

A class C fire extinguisher is used to extinguish:

Back 37

Electrical fires

Front 38

What unit is Sound level measured in:

Back 38

Decibels

Front 39

Construction fall protection is required whenever working over a minimum of how high:

Back 39

4 feet

Front 40

Refrigerant vapors in high concentrations should not be inhaled sense they:

Back 40

May cause heart irregularities or unconsciousness.