Pr3

Front 1

Carbon Dioxide is a heavy....

Back 1

colorless gas

Front 2

How much CO2 is stored in a standard supply cylinder?

Back 2

50 pounds

Front 3

How much heavier is CO2 compared to air?

Back 3

1.53 times heavier

Front 4

How can CO2 be converted into a liquid?

Back 4

by applying pressure to the gas

Front 5

All CO2 inflation cylinders must be painted what color and marking must be how high

Back 5

It must be painted gray and the lettering must be in black 1/4- inch high

Front 6

what information is included on CO2 inflation cylinders?

Back 6

Gross weight, weight of CO2 and date of latest recharge

Front 7

Standard 50 pound cylinder contains approximately how many pounds of liquid and how many pounds of gas?

Back 7

approximately 38 pounds and 12 pounds gaseous CO2 at a temp of 70 degreesF

Front 8

What does DOT stand for?

Back 8

Department of Transportation

Front 9

what cylinders are exempt from the hydrostatic retest?

Back 9

cylinders that do not exceed 2 inches in diameter and are less than 2 feet.

Front 10

Ensure all CO2 cylinders used for life rafts (except one-man life rafts) has what installed?

Back 10

a syphon tube

Front 11

What is to be looked for on a cylinder for inspection?

Back 11

corroded areas that exceed 1/34 inch or 5/64 inch in depth

dents and cuts: that exceed 1/16inch in depth or more than 32 times in depth

burns or bulges

Front 12

An accurate scale with a capacity of how many pounds is necessary?

Back 12

100 pounds. The scale should ahave 1/100 pound graduations

Front 13

What two types are sewing machines are classified as?

Back 13

Oscillating and Rotary.

* rotary hook and the oscillating shuttle.

Front 14

To lubricate a sewing machine what do you use and when do you use it?

Back 14

10w mineral oil two times a day.

Front 15

Oscillating sewing machine speed is how many stitch per minute?

Back 15

2200 stitches per minute and makes a lockstitch

Front 16

rotary sewing machine can sew up to how many stitches per minute?

Back 16

3000 stitches per minute and makes a lockstitch.

Front 17

Lifting presser bar tension regulating screw does what?

Back 17

regulates the pressure on the alternation presser foot

Front 18

feeding indication disc does what?

Back 18

indicates the number of stitches per inch which are being made by the machine

Front 19

balance wheel does what?

Back 19

provides a connection between the driving unit and the sewing machine head

Front 20

arm-and-hook driving shaft connection belt does what?

Back 20

connects the upper arm shaft with the hook driving shaft

Front 21

feed dog does what?

Back 21

feeds the material from the under side

Front 22

rotary hook assembly does what?

Back 22

contains the mechanism that forms the locstitch by using the needle and bobbin threads.

Front 23

bobbin does what?

Back 23

contains the lower thread used in forming the lockstitch

Front 24

needle-deflection hook washer does what?

Back 24

deflects the needle so the rotary hook will not strike the needle

Front 25

throat plate does what?

Back 25

surrounds the feed dog and keeps the material from slipping after the feed dog has been adjusted to the proper height

Front 26

bobbin case retainer hook gib does what?

Back 26

holds the bobbin case in the bobbin race

Front 27

throat plate does what?

Back 27

surrounds the feed dog and keeps the material from slipping after the feed dog has been adjusted to the proper height.

Front 28

bed slides does what?

Back 28

covers the feed eccentric and rotary hook assembly on each side of the throat plate.

Front 29

feed indicator plunger does what?

Back 29

used in connection with the feed indicator to regulate the number of stitches per inch desired

Front 30

safety-clutch lock stud does what?

Back 30

re-engages the needle with the hook driving assebly after clearing a thread jam

Front 31

bobbin case opener does what?

Back 31

prevents thread from jamming underneath the throat plate on th bobbin case base.

Front 32

rotary hook saddle complete does what?

Back 32

the rotary hook is operated by the spiral driving pinion gear, which, in turn, is operated by the hook driving gear located on the hook driving shaft

Front 33

thread take-up lever does what?

Back 33

pulls the needle thread against the tension disc after the lockstitch is formed at the rotary hook and pulls sufficient thread from the spool to make the next stitch.

Front 34

vibrating presser bar tension regulation screw does what?

Back 34

regulates the pressure on the presser foot

Front 35

face plate does what?

Back 35

covers and protests the mechanism of the two pressel feet and needle bar

Front 36

needle thread lubricator does what?

Back 36

lubrication of the thread when sewing leather pervents fray or the needle getting too hot

Front 37

needle thread tension

Back 37

regulates the tension on the needle thread so that the lockstitch may be adjusted properly

Front 38

needle thread controller spring assembly does what?

Back 38

removes sufficient slack from the needle thread when the needle is descending to prevent the needle from spliting the thread.

Front 39

needle bar does what?

Back 39

holds the needle and carries the thread to the rotary hook where the lockstitch is fromed

Front 40

vibrating pressure foot

Back 40

holds the material in place while the alternation presser foot rises to make another stitch

Front 41

lifting presser foot does what?

Back 41

holds the material in place while the vibrating presser foot and feed dog go forward to get material for the next stitch