Mechanical And Electrical

Front 1

What is plumbing

Back 1

the system of pipes fixtures and other appurtencances that supply water to a structure from a source such as a water main and remove it with any asscoiated waterborne wastes to a destination such as a sewer main.

Front 2

What is widely accepted as a guideline for plumbing desing minimum requirements?

Back 2

the NATIONAL PLUMBING CODE

Front 3

Why is copper one of the most widely used materials for tubing?

Back 3

Doesnt rust & is resistant to accumulation of scale particles in the pipe.

Front 4

what is Type K copper pipe?

Back 4

thickest wall pipe
used underground between water mains and the water meter.

Front 5

what is Type L copper Pipe

Back 5

thinner wall pipe
used from water meter and in water distribution

Front 6

what is Type M copper pipe

Back 6

thin wall pipe used inside homes for branch supplies where water pressure is low.

Front 7

When should copper not be installed?

Back 7

if the water has a low-pH

Front 8

What is CPVC

Back 8

a stiffer plastic pip desing for greater resistance to impact and extreme temp. 210 degrees F

Front 9

What is the difference between CPVC and PVC

Back 9

CPVS is more malleable

Front 10

how are galvanized pipes measured?

Back 10

The inside diameter.

Front 11

Whate 2 types of malleable iron or cast iron pipe fittings are used for steel pipe or wrought iron?

Back 11

pressure and recessed

Front 12

Durham fitting is also known as a

Back 12

cast-iron fitting

Front 13

How many parts does a ground joint union have?

Back 13

3

Front 14

how many parts does a flange union have?

Back 14

2

Front 15

An eccentric reducer joins pipes of different sizes so the two pieces of pipe will...

Back 15

Not be in line with each other.

Front 16

A nipple is a?

Back 16

Length of pipe with a male thread on each end

Front 17

Any pipe ______ must be adequately supported to prevent sagging.

Back 17

aboveground or in the building interior.

Front 18

on water mains, thrust blocks should be installed for what purpose?

Back 18

to prevent pip displacement casued by high water pressure.

Front 19

where is cast iron soil pipe (CISP) normally used?

Back 19

Under bldgs.

Front 20

VCP(vitrified clay pipe) is made of...?

Back 20

moistened powerdered clay.

Front 21

what cast iron fitting should you use to make a 22-1\2 degree change in pipe direction?

Back 21

1/16 th

Front 22

A test tee is used in stack and waste installations where the vertical stack joins the ______.

Back 22

horizontal sanitary sewer.

Front 23

Which of the following type of joint is not used for cast-iron soil pipe?

Back 23

speed seal

Front 24

With out a vent, water or waste descharged through a system tends to creat a ______ effect on other fixtures.

Back 24

Siphon

Front 25

when liquid water flows through aportion of a vent pip,___.

Back 25

it is a wet vent.

Front 26

what type of configuration does a bldg cold water service usually run through?

Back 26

valve-meter-gate valve

Front 27

in what way, if any, do waste stacks differ from soil stacks?

Back 27

soil stacks carry human waste

Front 28

what is the minimum dist. a bldg drain must extend beyond the bldg wall?

Back 28

3ft

Front 29

piping up to 12in. in diameter is referred to by its____?

Back 29

inside diameter

Front 30

pipin over 12in. in Diam. is referred to by its______?

Back 30

outside diameter

Front 31

Elbows chang how many degrees in directions?

Back 31

90 or 45 degrees

Front 32

street elbows change the direction of a pipe how?

Back 32

in close space where it would be impossible or impractical to use and elbow and nipple

Front 33

the ruducing elbow changes how many degrees?

Back 33

90 degrees

Front 34

What is a tee?

Back 34

connects pipes to change direction of a pipe run.

Front 35

What is a union?

Back 35

there are 2 types(ground joint union and flange union)
JOIN PIPES TOGETHER FOR EASY DICONNECTION

Front 36

what is reducer?

Back 36

joins 2 pipes of different sizes

Front 37

what is a gate valve?

Back 37

a linear motion valve used to start or stop fluid flow. doesnt regulate flow. opened all the way or closed all the. looks like a giant water hose opener.

Front 38

what is a check valve?

Back 38

valve used to not allow back flow of liquids, water, or gasses.

Front 39

What is generation?

Back 39

a power plant plant that generates electrical energy by conversion from some other enery source.

Front 40

what is distribution?

Back 40

electrical transmission system carries electrical current esternally from the generating station via substations and transforms to building locations

Front 41

What is internal wiring

Back 41

an internal electrical wiring system distributes electricity to illuminate the bldg and give out power.

Front 42

a complete electrical delivery network is considered a combination of the ___ section and the _____ section.

Back 42

transmission
distribution

Front 43

what type of feeder lines do seabees use at most advance bases?

Back 43

overhead

Front 44

alternator for a three-wire distribution system are connected in a___.

Back 44

delta

Front 45

a delta connected alternator system has___ voltage ratings

Back 45

one 220v

Front 46

a wye(y) connected altenator system has ___ voltage ratings.

Back 46

2

Front 47

a three wire power distibution system to draw 110v from a 220v

Back 47

a transformer

Front 48

a four wire power distribution system to draw 110v to a 220v

Back 48

neutral wire

Front 49

what type of tranformer is placed between the transmission line and service distribution?

Back 49

step down

Front 50

what is ohms law?

Back 50

current varies inversly to resistance

Front 51

underground power distribution system that seabees use the most

Back 51

cables buried directly

Front 52

what supplies power from the exterior distribution system to the entry point of the bldg?

Back 52

the service entrance

Front 53

what amp does the NEC remmend for circuit breaker type entrance switches and individual residences?

Back 53

50A
100A

Front 54

compared to a No.4 awg conductor, the size of a No. 16awg conductor is ...

Back 54

smaller

Front 55

what wire is most frequently used for interior wiring?

Back 55

12AWG

Front 56

what is RHW used for?

Back 56

wet locations

Front 57

which type of PVC counduit is designated for direct earth burial?

Back 57

Type 2

Front 58

what box would you normally use for a ceiling outlet?

Back 58

4-in octagon

Front 59

what is the lowest a switch can be on a wall to the floor?

Back 59

1/4 inches

Front 60

a symbol for a special purpose receptacle outlet looks how?

Back 60

a circle inscribed a triangle

Front 61

a symbol for a single pole switch looks how?

Back 61

an S

Front 62

a symbol for a ceiling outlet looks how?

Back 62

a circle

Front 63

most land based power systems use what type of electrical current?

Back 63

Alternating current(AC)

Front 64

what type of conduit can be threaded?

Back 64

rigid

Front 65

what size wire is most frequently used for interior wiring?

Back 65

12AWG

Front 66

What voltage is needed to operate the single phase motor at the motor pool?

Back 66

110V