Watertight closures NAMTS

The maximum acceptable warpage of a steel watertight door frame is?

1/8 in

Acceptable closing speed of a balanced joiner door is? 

5-10 seconds

Is stick packing required for doors with self-lubricated bushings installed?

No

How thick are ballistic armored closures?

The same thickness as the plating in which they are fitted

How many manufacturers are there of balanced joiner doors? 

3

Which MACHALT applies only to steel watertight doors in exterior locations or in high humidity area?    

MACHALT 526

A dog wedge must be replaced if it is worn more than _____ down.   

Half

What is the purpose of manhole covers?

Openings into unmanned spaces,tanks,voids for inspection/maintenance

If after adjusting jam nuts and dogs, the dogs can still be moved what must be done?                        

Replace bushings

True or False

Wedge for watertight closures may be screwed riveted, or welded in place?

TRUE

Cut closure gasket the length of closure plus how much?                                                    

1IN

What is the maximum allowable gap in the gasket joiner?                                                    

None

The maximum acceptable warpage of the knife edge on any WTD is plus or minus?                            

1/16

how many dog individually dogged doors are usually found below the V line to maintain watertight integrity.

10-12

During inspection you notice deep grooves carved into the dog wedges of a QAWTD. What must you do?      

Replace the dog wedge

When you need to scribe a circle with a radius larger than normal dividers use?                            

Trammel points

A multifunctional tool used to layout various angles, measure heights,bisect a 90 degree angle,and level?  

Combination square

What is used to scribe a line on a metal?                                                                  

Scratch Awl

what type of scuttle is Installed in hatches and decks in interior and exterior areas, offset in a corner out of high traffic zone?

Raised Watertight Scuttle

What MACHALT is installed on doors of airlocks/pressure locks located in boundaries of CPS zone?          

MACHALT 523

What type of hatch is located in flight decks, hangar decks, cargo decks or high traffic areas subject to loads of up to 6000LBS?

Flush watertight hatch

What should be done if paint is found on knife edge while conducting an inspection?                        

Remove paint using # 320 grit abrasive cloth

Ellison is what type of doors?                                                                            

Balanced Joiner Door

What needs to happen when the sweep and latch adjustment screws are bottomed out on a Ellison door?    

The balance door operator needs to be replace

What is the purpose of the packing plunger in a scuttle handwheel that has self lubricating bushings?

to fill the void

What is the dimension of hand wheel for 25inch scuttles?                                                  

13IN

When replacing the dog bolts nut on a watertight hatch, what size pin punch is needed?                  

1/8

While a door is being inspected or repaired what sign should posted?

Personnel working Behind door use alternate Access

What is the 1st step for personnel to complete prior to initiating an inspection of an Ellison door?      

Identify the manufacture and model

On most naval vessels, bushings are how big

1/8

The allowable gasket compression depth?

1/8

Trough drain is required in conjunction with what type of scuttles?                                        

Flush watertight scuttle

When checking gasket compression move the door handle to ___ before you take the measurement?

The point where the wedges engage the roller dogs

For easer reassembly of con rods what is the best practice to follow?                                      

Mark each con rod and its location with a metal etcher

What tool is used to clean out setscrew hole in the spindle of an individual dog assembly?

12-28 UNF tap

Which type of watertight closure has hinges that are more likely to experience wear?

Quick acting

If there is metal contact between the gasket channel and knife edge what is the procedure to correct?

Shim the door by adding or removing 1/16 IN thrust washer from each hinge

True or false a wire brush or metal scraper should be used to remove the existing paint?

False

What is the temporary repair for misaligned interior and exterior handle?

Installed a groove 1/8 inch roll pin in a hole drilled through the operating handle and the handle shaft

Prior to inserting the operating handle in to the bushing silicone must be applied to the spindle unless?

A self- lubricated bushing used

Which metal type of parts cannot be sanded and painted for a QAWTD operating handle?

CRES

True or False

Repairing a watertight door hinge assembly can be accomplished without disassembly of the closure mechanism?

True

For dog bolts located on the weather decks use dog bolts constructed of what material?

Stainless steel

What is Radial line development method?  

to develop patterns for objects that have lines that converge into a apex Such as a funnel or cone

____ is used to find the true length of lines on transition pieces

Triangulation

How to obtain the tools to use on worn or lose bushings?

Obtained locally IAW NSTM

Why must a gasket compression alignment be performed before greasing MALFO rollerdogs?

So the grease in not forced out

What tool is used to press in new bushings onto dog sleeve?

Plastic Hammer

Flanged bushings are held in place with what?

Allen set screw

How many stages is the BDO(balance door operator) for a joiner door?

2 stage

How many personnel are required to perform maintenance on a joiner door?

2

True or false Rollerdogs come factory set and do not have repair procedure?

True

Roller dogs must replaced if damaged

Line method used to develop square, rectangle and cylindrical shapes(prisms)?

Parallel line development method