UTB2 Basic Math, Electrical & Plumbing Operations Flashcards
The ABFC System revolves around a building block type of system. The largest type of block is a what, which brings together all of the people, facilities, equipment, and supplies required to perform a particular function? (Page 2-1)
Component
To bring together all of the information of the ABFC System, the Naval Facilities Engineering Command published what? (Page 2-1)
NAVFAC P-437
Leaching cesspools should not be placed closer together than how many feet by out-to-out measurement of the walls? (Page 2-17)
20
Leaching cesspools should be used only where the subsoil is porous to a depth of at least how many feet and where the groundwater is below this elevation? (Page 2-17)
8 or 10
Soils that require more than how many minutes for a fall of 1 inch are unsatisfactory for leaching, and some other disposal method must be used? (Page 2-18)
30
In constructing a septic tank, be sure the length of the septic tank is not less than two, or more than three times the width. The liquid depth should not be less than 4 feet for the smaller tanks and how many feet for the larger ones? (Page 2-19)
6
Although septic tanks that are designed properly require little operating attention, they must be inspected periodically; the frequency of inspection is determined by the size of the tank and the population load. The minimum frequency should be once every how many months at periods of high flow? (Page 2-19)
2
Sludge and scum accumulation should not exceed what amount of
the septic tank capacity? (Page 2-19)
1/4
A four-hole burnout field-type latrine is used at most advanced or temporary bases. The burnout latrine is kept in an orderly condition (daily) by camp maintenance personnel or by the sanitation crew assigned. Two people can effectively and efficiently dispose of the excremental waste of how many people? (Page 2-22)
500
The Milnor washer is a fully automatic or manually operated unit with a 50-pound or 100-pound load capacity. It is supplied with a programmable cycle control and an automatic supply injector and uses how many gallons of water per wash cycle? (Page 2-25)
125
What advises the commanding officer on water quality issues? (Page 2-27)
Medical department
The tank trailer, sometimes referred to as a “water buffalo,” has a capacity of how many gallons of water? (Page 2-28)
400
What process is used to disinfect water containers (lyster bags, tank trailers, etc.) and distribution systems initially before they are used or when they have become contaminated? (Page 2-28)
Superchlorination
Superchlorination is accomplished by chlorinating the water in a container or distribution system to at least100 ppm FAC and holding it in the container for how many hours? (Page 2-28)
4
At 77° F the ROWPU can produce 600 gph from fresh or brackish water and how many gph from seawater? (Page 2-35)
400
In order to perform mathematical calculations that involve more than one type of
function, you must perform the calculations in a specific order. Which function is
conducted after the exponent function calculation?
Multiplication
In whole numbers, how is the value of the number determined?
Placement in number
How many steps are used to multiply decimals?
Two
In accordance with rounding rules, if the number in the thousandth place is a 5,
what actions do you take?
Round number up
What is the top number of a fraction called?
Numerator
What is the simplest way to convert fractions to the same denominator?
Multiply their denominators
When the numerator is larger than the denominator after adding fractional
numbers, what is the result called?
Improper fraction
How does one convert a number from a fraction to a decimal?
Divide the numerator by the denominator
What formula is utilized to determine the volume of a rectangular tank?
V = L x W x H
You are tasked to calculate the volume of an elliptical tank; which of the following
formulas would you utilize?
V = H x W x 0.7854 x L
What is defined as the actual movement of electrons through a conductor?
Current
The atom consists of how many parts?
3
Electrons carry what type of electrical charge?
Negative charge
When current is made to flow through a wire, how many different effects does
this create in or around the conductor?
4
As the intensity of the current through the wire increases, what effect (if any)
does this have on the associated magnetic field?
strength of the magnetic field increases
As a UT, how many different types of current will you encounter during a HVAC
installation?
2 AC/DC
How does a battery create output voltage?
Chemical action
If higher amperage is required, how can you increase the amperage output of
batteries?
Wire batteries in parallel
You are using iron as a conductor, and the temperature of the iron increases;
what effect does this have on electron flow?
Move towards the heat
What is the coolest end of a piece of metal referred to as?
Cold Junction
A generator converts mechanical energy into electrical energy by which of the
following principles?
Magnetic induction
Materials with little resistance are also known as what?
Conductors
What is another term used for resistance inherent to the conductor?
Unavoidable resistance
How many factors contribute to the resistance of a conductor?
2
If the cross sectional area of a conductor is increased, what effect does this have
on the resistance of the conductor?
Decreases
You want to obtain the least amount of resistance of a wire; what size conductor
should be utilized?
Short
What type of skin condition offers the highest resistance to low voltage shocks?
Dry
The resistance of the internal body, hand to foot, is approximately between
_________ohms?
400 - 600
When utilizing portable tools on the job site, what is the maximum resistance that
tool can have?
Less than one ohm
Which of the following pieces of electronic equipment has the capability to store
electricity?
Capacitor
A fire breaks out inside a power panel; which type of extinguishing agent is use
to combat the casualty?
CO2
What procedures are used to inform all personnel that a piece of equipment is
under repair?
Lockout
A circuit must contain a minimum of how many components to be considered an
electrical circuit?
3
Resistor converts _______ energy to ______ energy?
Electrical to heat
Which of the following is NOT an area of concern when properly sizing
conductors?
Impedance of the wire
The numbering system used for sizes of different types of wires is commonly
known as what?
American Wire Gauge (AWG)
The symbol for moisture resistant thermoplastic insulation is which of the
following?
TW
Which color represents a grounded neutral wire?
White
What type of tool is utilized when using No. 10 AWG wire or smaller for splicing
operations?
Wire stripper
If a series circuit contained three sets of lamps, and the middle lamp went out,
what would be the status of the other lamps?
Out
A parallel circuit contains three branch circuits, what is the voltage across the last
branch?
Total applied voltage
(True or False) Ohm’s law only applies to purely resistive AC and DC circuits.
True
Which is the formula for total voltage in a series circuit?
ET = ER1 + ER2
Which is the formula for total current in a series circuit?
IT = IR1 + IR2 + IR3
How many meters make up a multimeter?
3
While utilizing a voltmeter, the first step is to select either AC or DC, what would
be your next step?
Range selection
Voltmeter indicates a voltage when connected; what does this indicate to you?
Open switch
If the voltmeter gives a reading of zero, what does this indicate?
Good fuse
When using the ammeter, which range selection is recommended to start out?
Highest
How are the leads connected on an ammeter to measure current?
Connected in series
How are the leads connected on an ohmmeter for a deenergized circuit to obtain
a resistance reading?
Connected in series
While using the ohmmeter, its display indicates a value of resistance; what does
this indicate?
Resistance across motor windings
How many faults associated with electrical circuits?
4
How is an open represented on an ohmmeter’s display?
Infinity
What is defined as an accidental path of little or no resistance which allows
current to bypass the load?
Direct short
Which of the following is defined as the ungrounded (hot) conductor of one
segment of a parallel circuit contacting an ungrounded (hot) conductor of another
segment of that circuit?
Cross short
Which of the following type of short is the hardest fault to troubleshoot?
Floating short
What is an indication of a low power condition?
Relay chatter
Which part of the troubleshooting sequence is used to separate the problem to a
particular section of the system?
Sectionalization
Which part of the troubleshooting sequence is used to gradually reduce the area
until faulty component is isolated?
Localization
Which type of pipe is used to distribute natural gas?
Black iron
What is another term for the length of copper tubing that is lost in the assembly?
Pipe engagement
In conducting measurements and calculations on a piping system, what fitting
terminology indicates where lines of flow intersect?
Center
In conducting measurements and calculations on piping system, what fitting
terminology refers to the outer most edge of a run or branch?
Face
Which of the following pipe measurement methods is from one end of the pipe to
the other end, including both threads?
End to end
How is the end to center measurement taken?
End of the pipe to the center of the fitting
What does a pipe indicate with a fitting at each end?
Face to face
Which of the following measurements encompasses a measurement from the
back of one to the back of the other fitting?
Back to back
What is meant by the term frost line?
Maximum depth at which the soil freezes
Which is the formula used to achieve additional depth digging
requirements for a sloped trench?
AD = L x DS
Whose approval is required prior to excavating any trench used for pipe layout?
Resident Officer In Charge of
Construction (ROICC)
How far away does the material removed from an excavation site need to be
away from the excavation edge?
24 inches
What is the minimum width required for any trench dug by hand?
2 feet
How deep do pipes need to be layed when they cross under roads or areas of
vehicular traffic?
4 feet deep
What is the purpose of shoring?
Prevent cave-ins of excavation sites
(True or False) If you are working in a trench that is 6 feet deep, and contains
hard packed clay, shoring is mandatory.
True
What is the depth requirement of a trench containing sandy soil to install shoring
material?
4 feet
Ladders used in trenches need to alternate from each side at what distance
intervals?
50 feet or less
Ladders, if used, need to extend how many inches above the excavation edge?
36 inches
What is the most common method used by UT’s to grade a trench?
String line and line level
Which of the following is responsible for setting batter boards at the proper level?
Engineering Aids (EA)
Which of the following is the most common method of grading a pipe?
Carpenters level
When using an 18 inch level, what size block do you tape to the end?
3/8 inch
What is the purpose of testing rough-in piping?
Ensure the joints are tight enough to withstand working pressure
When conducting a water test on a pipe laid in a trench, how long must the water
been in the pipe prior to starting test (if any)?
15 minutes
How much air pressure is required to conduct an air test?
5 psi
What is the purpose of removing standing water from a trench prior to
backfilling?
Allows for compaction of soil during backfilling
When are you authorized to use compaction equipment to tamp down backfill
material?
Reach 2 feet of compacted backfill above pipe
How much backfill is required on roads in non- traffic areas?
6 additional inches of backfill
How many methods are associated with grading a trench?
3
How many measuring methods are associated with piping?
7
When taking resistance readings the meter must be connected in what
condition?
Series
Which color is NOT associated with a “Hot” wire?
White
As the temperature of the conductor increases, what does the resistance of the
conductor do?
Increase
