Term
Heat loss in a building due to air leakage is
called: |
|
Definition
|
|
Term
To reduce costs in plumbing, locate two
bathrooms back-to-back or locate kitchen
plumbing next to a bathroom. True or False |
|
Definition
True
Kitchens and bathrooms can have common supply
lines. |
|
|
Term
The device used to advance wire through a
conduit is a: |
|
Definition
|
|
Term
The higher the -value, the greater the
resistance to the flow of heat. |
|
Definition
|
|
Term
Hot wires in an AC circuit are either black or
white. True or False. |
|
Definition
False
Black is hot; White is neutral. Both carry current
when the AC circuit Is complete, however. |
|
|
Term
The pressure-relief valve on a water heater
responds to: |
|
Definition
|
|
Term
On a sewer line, vertical stacks are connected
to the: |
|
Definition
|
|
Term
Hardened copper is preferred to soft copper in
some applications because: |
|
Definition
|
|
Term
| Two pipes of unequal size are joined by a: |
|
Definition
|
|
Term
In a residential steam-heating unit, how many
pounds of pressure will cause the pressure
regulator valve to pop? |
|
Definition
|
|
Term
|
Definition
Must always be grounded and uses the armor
as an equipment grounding |
|
|
Term
What is the maximum operating temperature
for THW cable? |
|
Definition
|
|
Term
| Which of the following may be hooked up to a 2" vent? |
|
Definition
|
|
Term
How many bathtubs may be hooked up to a 2"
vent? |
|
Definition
|
|
Term
| The minimum size trap allowed for a shower is: |
|
Definition
|
|
Term
The minimum size vent allowed for a shower
is: |
|
Definition
|
|
Term
Where should you install a steam-heat
(radiation) unit? |
|
Definition
|
|
Term
When connecting two gas lines in a concealed
area, use: |
|
Definition
| Right/left nipple and couplings |
|
|
Term
, Which of the following copper electrical wires
has the least resistance? |
|
Definition
|
|
Term
The most commonly used ferrous pipes are
brass, copper, and lead. True or False |
|
Definition
False
Ferrous pipe contains iron (e.g., cast iron pipe). |
|
|
Term
The most commonly used non-ferrous pipes are
steel and cast iron. True or False |
|
Definition
False
Cast iron is ferrous. |
|
|
Term
Where do you locate the return-air registers for
an electric heating svstem? |
|
Definition
|
|
Term
Where do you locate the register for a cavity
heater? |
|
Definition
|
|
Term
In what type of installation would you put a 4-
wire, 3-phase wire electrical system? |
|
Definition
|
|
Term
Piping used for air-conditioning unit (i.e.,
from compressor to unit): |
|
Definition
|
|
Term
An air-conditioning unit runs constantly.
What may be the cause? |
|
Definition
|
|
Term
Where are the filter pads located in a forced
warm-air unit? |
|
Definition
|
|
Term
The black wire in an air-conditioning circuit
is: |
|
Definition
|
|
Term
You would put a fuse or circuit breeder in the
side of a circuit having: |
|
Definition
|
|
Term
Permanent openings for the passage of an air
supply should have a free area of at least: |
|
Definition
lsq. in. per 1,000 BTU/hr
= British Thermal Unit) |
|
|
Term
What is the difference between #4 and #6
copper electrical wire? |
|
Definition
Diameter in mils
One mil equals .001 inch |
|
|
Term
When two fans are operated in series, their total
CFM (Cubic Feet per Minute) capacity (i.e.,
airflow) is: |
|
Definition
Same as capacity of one fan alone
Airflow is doubled when fans are connected in
parallel. |
|
|
Term
What should you do with a disposable air
filter? |
|
Definition
|
|
Term
| How do you clean a permanent air filter? |
|
Definition
Wash with warm water
Dry air filters can be cleaned by air jet, water jet,
steam jet, etc. |
|
|
Term
| Why is aluminum electrical wire used? |
|
Definition
|
|
Term
What is the water flow from a residential sink
faucet? |
|
Definition
4.5 GPM
Note: The state may give 4.0 GPM. |
|
|
Term
How do you prevent air from escaping from
ducts? |
|
Definition
Seal seams, cracks, and holes
Air leakage through duct seams and holes,
depending on the seriousness of the problem, can
cause a loss of up to 1/3 of the air supply. This
problem is usually caused by poor workmanship
and can be corrected by sealing the seam cracks
and holes by caulking, soldering, or covering with
asbestos tape. |
|
|
Term
For copper, No.___electrical wire is the
smallest size used for general wiring. |
|
Definition
14
The smallest copper wire permitted by the NEC for
general wiring is No. 14. The smallest aluminum wire permitted is No. 12. |
|
|
Term
When attaching a header to a king stud, the
minimum nailing is: |
|
Definition
| 4 - 16d (per each end of the header) |
|
|
Term
| An advantage of PVC vs. Metal pipe is: |
|
Definition
| It can be used in masonry and concrete |
|
|
Term
In a residence without a chimney, the type of
heater you should use is: |
|
Definition
|
|
Term
| A hot air furnace return should be located: |
|
Definition
|
|
Term
| The return on an A/C system should be; |
|
Definition
| Placed close to the thermostat |
|
|
Term
| Secure Romex between boxes with: |
|
Definition
|
|
Term
| The proper fitting for galvanized pipe is: |
|
Definition
|
|
Term
When scrutinizing a boiler and you discover
the glass has no water, you should: |
|
Definition
|
|
Term
In the case of 2-wire Romex and an AC circuit
which is hot? |
|
Definition
|
|
Term
If you were to install a 3-wire, 240V circuit in
conduit to code, and it consisted of a white,
red, and black wire, you would connect: |
|
Definition
|
|
Term
What is an advantage of nonmetallic cable
relative to BX? |
|
Definition
| It can be used indoor or outdoor |
|
|
Term
| It can be used indoor or outdoor |
|
Definition
|
|
Term
If two pipes are separated by a short distance,
use: |
|
Definition
|
|
Term
| What would you use for digging a sewer line? |
|
Definition
|
|
Term
What is the heat loss through a crack in the
building called? |
|
Definition
|
|
Term
Which one holds less humidity, cold air or
warm air? |
|
Definition
|
|
Term
What is the name of the final run from the
electric utility feeder before the connection to a
dwelling? |
|
Definition
|
|
Term
What is the term for electric utility as it enters
the house? |
|
Definition
|
|
Term
When connecting 220 volts, which two wires
do you use? |
|
Definition
|
|
Term
| A black wire in an air-conditioning circuit is? |
|
Definition
|
|
Term
You have three wires: Red, black, and white.
Which should be used for a 220V system? |
|
Definition
|
|
Term
| With a 1 lOV line, which one is the hot wire? |
|
Definition
|
|
Term
What wire attaches directly to the distribution
box? |
|
Definition
|
|
Term
Which box is grounded to a rod driven into the
ground? |
|
Definition
|
|
Term
Where would you most likely find 4-wire 3-
phase electrical hookups? |
|
Definition
|
|
Term
If the resistance is constant, to increase the
amperage of a DC circuit, what must be
increased? |
|
Definition
|
|
Term
Among Ampmeter, Voltmeter, Ohmmeter,
and Oscilloscope, which would you NOT use
for measuring a live circuit? |
|
Definition
|
|
Term
Which test should NOT be made with the
service switch "on": Voltage, Current, or
Resistance? |
|
Definition
|
|
Term
What is the resistance for a 1 lOW lamp
connected to a 220V line? |
|
Definition
440W (Ohms.)
R=Esquare, P = (220V)square, HOW = 440W |
|
|
Term
Among these copper wires: #12, #8, 0,00,
which one has the least resistance? |
|
Definition
|
|
Term
| Among "0", "00", #10 and 500 MCM, which is the smallest wire size? |
|
Definition
|
|
Term
What is the difference between #4 and #6
eopper electrical wire? |
|
Definition
|
|
Term
In some cases, hardened copper is preferred to
soft copper because it is ____________. |
|
Definition
|
|
Term
Which of the following can be used outdoor:
Sheathed cable, BX, EMT, or bare wire? |
|
Definition
| EMT (Electrical Metal Tubing) |
|
|
Term
| Can unsheathed cables be used outdoor? |
|
Definition
|
|
Term
| What is one deficiency of unsheathed cables? |
|
Definition
| Susceptible to mechanical damages. |
|
|
Term
What is the advantage of non-metallic cables
over BX cables? |
|
Definition
| It can be used indoor and outdoor. |
|
|
Term
| What is the disadvantage of BX cable? |
|
Definition
| It is for interior use only. |
|
|
Term
Beside being difficult to be pulled and
replaced, BX cables are also________ |
|
Definition
|
|
Term
Where should electrical wire be run in PVC
(Polyvinyi Chloride) conduit? |
|
Definition
| Through the foundation slab. |
|
|
Term
What is the name of the tool used for pulling
wires through conduits? |
|
Definition
|
|
Term
How do you support non-metallic sheathed
cables? |
|
Definition
|
|
Term
Can damaged power cables be spliced and
taped only for an emergency? |
|
Definition
|
|
Term
On the electrical drawing, a symbol which has
two parallel vertical lines cutting through a
circle indicates: |
|
Definition
| A duplex 1 lOV wall receptacle. |
|
|
Term
A lamp specified as "40W, T-20, RS,CW".
What does that mean? |
|
Definition
| 40W Fluorescent Bi-pin Rapid start/cool white. |
|
|
Term
If a motor uses 2.5 kW at $0.15 per kWh; how
much would it cost to run the motor for one
day? |
|
Definition
$9.00
2.5KWX $0.15x24 hours. |
|
|
Term
A room 20' wide has 4 rows of lights. How
Far from the wall should the center-line of the
first row be? |
|
Definition
2'6"or2'/2"
20', 4rows-5'
5'. 2 =2'6" |
|
|
Term
Locate four 4' long x 6" wide fluorescent light
fixtures symmetrically and parallel to the major
axis of a 16' X 20' room. How far from the
wall should the center lines of the closets
fixtures be from the 20' wall and from the 16'
wall? |
|
Definition
| 5' from the 20', and 4' from the 16' wall |
|
|
Term
You are servicing a gas burner. If the blower
motor doesn't come on, what is probably NOT
the cause? |
|
Definition
The thermocouple was not generating enough
electricity. |
|
|
Term
When referring to channel designations, R.C.
means |
|
Definition
|
|
Term
Powered brakes can be applied by electrical
current. True or False? |
|
Definition
|
|
Term
Excepting water closets and any other fixture
which is specifically designated by local
plumbing code or ordinance, a pipe which
receives the discharge fi-om the plumbing
fixtures, and conveys such discharge to a soil
pipe, house drain, or house sewer is known as: |
|
Definition
|
|
Term
When laying a perforated drain line, holes
should be aligned so they are discharging___________________. |
|
Definition
|
|
Term
Vertical stacks on a sewer line are connected
with: |
|
Definition
|
|
Term
What can cause a vent pipe to leak: The
cement is cracked - Not enough shingies - or
incorrect flashing? |
|
Definition
|
|
Term
| A "Wet vent" also serves as a: |
|
Definition
|
|
Term
When using a vertical cast iron pipe, which
way should the hub face? |
|
Definition
|
|
Term
Horizontal water supply pipes should be
_____at every joint. |
|
Definition
|
|
Term
Should water line be sloped to the highest
fixture? |
|
Definition
|
|
Term
Where do cold water and hot water
converge? |
|
Definition
|
|
Term
Among copper (common), galvanized, black
iron (or elk), and plastic, which should never
be used for gas lines? |
|
Definition
|
|
Term
What tool should you use to clean out debris
in a pipe? |
|
Definition
|
|
Term
What type of connector is used to connect the
2 pipes which are different sizes? |
|
Definition
| A bell coupler, or a bell reducer. |
|
|
Term
Two pipes of unequal size can be joined with
a: |
|
Definition
|
|
Term
When connecting copper pipe to galvanized
pipe you should use a dielectric fitting, a union,
a brass fitting, or a bell coupler? |
|
Definition
A dielectric (non-conductive) fitting, or a brass
fitting. |
|
|
Term
What is the result of using dissimilar metals in
piping? |
|
Definition
|
|
Term
What would you use to connect 2 pipes that
have a slight gap? |
|
Definition
|
|
Term
The main benefit of an Erickson coupling is
that the pipe will not: |
|
Definition
|
|
Term
You can buy regular fitting and drain fitting.
What can you use regular fitting for? |
|
Definition
|
|
Term
What is the advantage of using rigid copper
tubing over flexible copper tubing? |
|
Definition
| It is less susceptible to damage. |
|
|
Term
Copper tubing has no threads, and copper
pope is threaded at both ends. True or False |
|
Definition
|
|
Term
| copper nttings generally are: |
|
Definition
|
|
Term
When ordering pipe nipples, how are sizes
called out? |
|
Definition
| Nipple sizes, and lengths. |
|
|
Term
What type of valve would you use to decrease
pressure in a line? |
|
Definition
|
|
Term
| Where would you use a back-flow preventer? |
|
Definition
|
|
Term
The material used in a cooling system that
absorbs heat through expansion is called: |
|
Definition
|
|
Term
BTU (British Thennal Unit) is the quantity
of heat requires to raise the temperature of
_____one degree Fahrenheit. |
|
Definition
|
|
Term
One pound per square inch (1 psi) is
developed by what height of water? |
|
Definition
|
|
Term
In addition to the number of windows, the
linear footage of the exterior walls, what else
determines the size of an air conditioning unit? |
|
Definition
|
|
Term
Where is the compressor for the air
conditioning unit located? |
|
Definition
|
|
Term
What type of heating unit for a house that
does not require a vent? |
|
Definition
| An electric heating unit. |
|
|
Term
When ducts are placed in concrete, the
proper type of furnace to install is: |
|
Definition
|
|
Term
| Where should you register for a gravity-flow heater be located? |
|
Definition
|
|
Term
Where is the best place to install a return-air
register for an electric forced air heating
system? |
|
Definition
As close to the furnace as possible, on an
inside wall, up high. |
|
|
Term
Where should registers be placed in a
perimeter heating system? |
|
Definition
| Below an exterior window. |
|
|
Term
Where should a steam-heat (radiation) unit be
installed? |
|
Definition
|
|
Term
How many cubic feet of gas does it take to
leat a 40-gallon water heater to boiling point? |
|
Definition
|
|
Term
On a coil-in-tank water heater, where should
the coil be? |
|
Definition
| On the bottom of the tank. |
|
|
Term
What type of heating furnace do you use when
placing it in a crawl space or attic? |
|
Definition
|
|
Term
What should you do with a (used) disposable
air filter? |
|
Definition
| Discard it, or throw it away. |
|
|
Term
How should you clean a (used) permanent air
filter? |
|
Definition
|
|
Term
What is the minimum size gas line for an
appliance? |
|
Definition
|
|
Term
| How deep should you bury a gas pipe? |
|
Definition
|
|
Term
No gas piping should be installed in or on the
ground UNDER any building, and all exposed
gas piping should be above ground at least: |
|
Definition
|
|
Term
No galvanized wrought iron, or galvanized
steel pipe shall be used underground as a drain
pipe, and shall be kept above ground at least: |
|
Definition
|
|
Term
What is the minimum size drain pipe for a
water close? |
|
Definition
|
|
Term
On a 1 '/2" gas pipe line, what is the
maximum distance you will need to support it? |
|
Definition
|
|
Term
A vertical pipe is any pipe installed in a
vertical position, making an angle of not more than_________ with the vertical line. |
|
Definition
|
|
Term
| A water line serving more than one building on the same piece of property must have how many shut-off valves? |
|
Definition
| 1 separate shut-off valve for each building |
|
|
Term
| Type "K" copper tubing is marked with what color identification-stripe? |
|
Definition
|
|
Term
| Type "L" copper tubing is marked with what color identification-stripe? |
|
Definition
|
|
Term
Type "M" hard drawn copper tubing is
marked with what color identification-stripe? |
|
Definition
|
|
Term
Type "DWV" copper tubing is marked with
what color identification-stripe? |
|
Definition
|
|
Term
| Copper water lines in a residence are normally__________in diameter. |
|
Definition
|
|
Term
| What IS the minimum size ot the trap tor a shower stall? |
|
Definition
|
|
Term
| What is the minimum size of the trap for a bathtub and overflow vents? |
|
Definition
|
|
Term
Which size of vent should be used to hook up
4 urinals? |
|
Definition
|
|
Term
How many bathtubs may be hooked up to a 2
inch vent? |
|
Definition
|
|
Term
| Ventilation ot a garage should be to the_______. |
|
Definition
|
|
Term
In an apartment house or hotel, a window
serving a water closet or shower compartment,
or bath, toilet, service room, may open directly
to: |
|
Definition
|
|
Term
| For an attic, the insulation must be cleared by at least__________from the vents. |
|
Definition
|
|
Term
In toilets or bathrooms where provisions for In toilets or bathrooms where provisions for natural ventilation can not be met, how many
cubic feet of air per minute per square foot area must a mechanical exhaust system remove? |
|
Definition
| 2 cubic feet/minute/square foot |
|
|
Term
| The permanent opening for the passage of air exchange should have an area of at least: |
|
Definition
| 1 sq." / 1,000 Btu (British Thermal Unit) / hour |
|
|
Term
What is the minimum clearance for a light in
a closet? |
|
Definition
|
|
Term
The NEC (National Electrical Code) is
divided into 2 parts: Low Voltage and High
Voltage. The high voltage begins at: |
|
Definition
|
|
Term
What is the minimum size AWG (American
Wire Gauge) service that can enter a house? |
|
Definition
|
|
Term
What is the smallest wire size used in a
residence? |
|
Definition
|
|
Term
The main electrical service switch on a
building should be rated for not less than the load to be carried. |
|
Definition
|
|
Term
| What depth should a direct burial cable be? |
|
Definition
|
|
Term
What is the maximum number of over
current devices allowed in one branch circuit
panel? |
|
Definition
|
|
Term
How many conductors can you put into a
conduit? |
|
Definition
| 40% of the conduit's cross section |
|
|
Term
How many 90 degrees bends are allowed in one run, using EMT (Electrical Metallic
Tubing) conduit? |
|
Definition
| Four 90 degree bends maximum |
|
|
Term
What is the maximum voltage you can run
through a EMT conduit? |
|
Definition
|
|
Term
What is the maximum recommended
temperature in which you can use PVC
(Polyvinyl Chloride) conduit? |
|
Definition
|
|
Term
| Where do you install a 4-wire, 3-phase "Y" electrical system? |
|
Definition
| For data processing center. |
|
|
Term
What is the maximum operating temperature
for THW cables? |
|
Definition
| 75 degree Celsius (or 167F) |
|
|
Term
| All electrical connections must be made in an: |
|
Definition
|
|
Term
It is common practice to leave at least____"
of free conductor at each outlet or switch point
for splicing. |
|
Definition
|
|
Term
A series of fluorescent lights should have
what type of switches? |
|
Definition
|
|
Term
BX cables using the armor as equipment
grounding, and must always be: |
|
Definition
|
|
Term
| A ground wire should be connected to a: |
|
Definition
|
|
Term
Which way should the holes face on
perforated drainage pipe (tile) when installed horizontal? |
|
Definition
|
|
Term
When using thermoplastic wire, which wire
is connected to the panel? |
|
Definition
White wire
The white neutral wire is connectedto the fuse box. |
|
|
Term
| A radiator should be located near an: |
|
Definition
Outside wall, under a window
Air currents from the window will convey the heat
into the room. |
|
|
Term
What valve is used to bring pressure down to
normal? |
|
Definition
|
|
Term
| Which of the following can be buried? |
|
Definition
Thin-walled conduit
Electrical metallic tubing (EMT) may be installed
underground, but it must be protected against moisture. |
|
|
Term
| What is the unit called that runs from the electrical supply to the house wiring? |
|
Definition
|
|
Term
| Where do hot and cold water lines converge? |
|
Definition
|
|
Term
| What do you use on rolled roofing? |
|
Definition
|
|
Term
| Regular plumbing pipes can be used for: |
|
Definition
|
|
Term
Minimum pitch of a self-sealing, double-
lapped shingle roof? |
|
Definition
|
|
Term
What is the underlayment material used in
roofing? |
|
Definition
|
|
Term
| What does a pressure-relief valve on a water heater respond to? |
|
Definition
| Temperature and pressure. |
|
|
Term
Pressure - Temperature relief valve shall run
to the exterior of a building with a full size
drain of either galvanized steel or hard draw copper, with the end of pipe pointing downward, and being: |
|
Definition
| 6" to 24" above the ground |
|
|
Term
| Where do you install a 4-wire, 3-phase "y" electrical system? |
|
Definition
|
|
Term
| Where should electrical wire be run in PVC(Polyvinyll Chloride) conduit? |
|
Definition
| Through the foundation slab |
|
|
Term
How many conductors can you put into a
conduit? |
|
Definition
|
|
Term
| What is the name of the tool used for pulling wires through conduits? |
|
Definition
|
|
Term
190. BX cable using the armor is equipment
grounding, and must always be: |
|
Definition
|
|
