Leveling and Bore Alignment Flashcards
To level means to?
Put into the same plan as the horizon
Describe the difference between flat and level?
Level is level to the horizon where flat can be flat but on an angle
What is plumb?
To align perpendicular to horizontal
Describe square?
Somthing that is aligned 90 degrees to reference line.
The advantages of optical lines of site are :
Does not sag
Cannot be kinked
____________
There is no tripping hazard
Remains straight for long distances
Can measure within thousands of an inch
Does not vibrate
What are some problems using optical lines?
- Problems shooting through heat waves, causes distortion
-Shooting through glass, refracts (bends) the line of sigh and gives false reading.
- shooting through an opening that is to small, using a sitting block can improve accuracy
- Shooting near edge of a hole, can bend the line of sight due to reflection and refraction
What is the advantage of using a pentaprism (5-sided) over standard prism?
Penta prism does not reverse the image
Precision targets are used with an _______ micrometer. And can read to an accuracy of __________ on an inch and when used with a vernier scale can be accurate to ___________ of an inch.
Optical
.001
.0001
What are the two types of scales?
Rough alignment
And
Precision alignment (.001” accuracy)
The alignment bar is for _______?
Simple, versatile, and economical way of achieving the desired precision reading over 100 ft
Tilting levels are used strictly for _________?
Levelling procedures
What is a way to check if your reference line is level?
By checking from both ends
If it is level it will be the same on both ends
A plumb aligner bracket is used to_______?
Establish a vertical plumb line quickly and easily
A jig transit is used to _________?
What are the five optical questions it can answer?
To align and establish precise vertical plans and plumb lines.
1: is it level
2: is it flat
3: is it plumb
4: is it straight
5: is it square
Bucking in is the process of aligning an _________ tool onto two targets at the same time?
Optical
Checking the vertical accuracy of a jig transit or theodolite can be accomplished with what________?
Plumb bob in a bucket of oil
What are theodolites used for?
To measure angles in horizontal and vertical planes
All purpose instruments with the ability to shoot and measure the angle of slope or angle of deviance from a horizontal reference line.
Can be more complicated to set up
Wire alignment when done properly can provide accuracy as close as ________\?
.0001”
What is one problem when using horizontal wire alignment is __________ to over come this you must refer to ________
Wire sag
Sag charts
What are the three catagories of lasers:
High accuracy, long distance
High accuracy, short distance
And
______________
Construction grade, with limited accuracy. Approximately 1/4 inch over 100 feet
Laser options are:
Shaft (coupling) alignment for horizontal
Shaft (coupling) alignment for vertical machines
Single flat plain straightness
Perpendicularity (or 90 degrees to level surface
Parallelism
Spindle alignment
This laser can be referred to as the micro gauge family of precision measurements and alignment tools?
High accuracy, short distance laser
High accuracy short distance lasers consist of three parts:
Laser
__________
And
Mounting hardware
Receiver
Construction lasers were designed to take the place of what?
Hand levels, string lines, plumb bobs and water levels
When lasers are stored they should be shut down cleaned and __________ removed?
Batteries
New electronic levels should be operated between which temperatures?
-20c to +50C
A coincidence striding level is used on a ________ telescope or Collimator to establish the tool is in the level position.
Alignment
Rough alignment scales are used for general work such as?
Levelling floors or setting the drainage for pipes
To obtain an accurate reading with the optical scale is to?
Rock the scale slowly back and forth slightly waving the scale. Shortest reading is the correct reading
Single flat plane leveling
Straightness
Flatness
Perpendicular
Parralism
Spindle alignment
Can all be checked with what tool?
Lasers
