Assignment Flashcards
Before starting any alignment, a lock out is performed to protect personnel from machine starts or roll overs. What is meant by the term “intrinsically safe?”
No component of the system will generate sufficient power or generate a spark with a temperature high enough to ignite an explosive substance or gas
Why is it important to stay within the operating temperature range and avoid sudden temperature changes when using laser alignment equipment?
Heat and steam cause beam distortion and inaccurate readings
Sudden temperature changes causes inaccuracies while acclimatizing
What is the term used for a reference point that is used to set the final elevations of installed equipment?
Bench mark
What is meant by the term plumb?
to align to the vertical
What is designed to be used so that no matter what angle the incident ray enters, the refracted ray will leave at exactly at 90°?
Optical square
When using a tilting level why is a rough leveling important?
To ensure the coincidence level is within adjustment
When using a tilting level what must be adjusted before every shot to ensure accurate reading?
Coincidence level
Optical tools equipped with a micrometer attachment that includes a vernier scale can measure to an accuracy of:
0.0001”
When placing a tilting level between the backsight and foresight, its position should be;
Equal distance from the backsight and foresight
What readings would be at the lowest elevation when using an optical level?
the largest number!!!!
When using an optical micrometer, when you shoot a backsight what does this reading tell you?
Elevation from the bench mark to the instrument’s line of sight
Which optical instrument has the ability to measure angles of rotation in horizontal and vertical planes?
Theodolite
Theodolite = angles
Which attachment is required when performing a bucking-in process with a jig transit?
Precision Lateral Adjustor
To obtain the most accurate reading using a rough alignment scale, (Rods) what is done?
Rock the rod slowly back and forth on each side of vertical, take the lowest reading
What alignment procedures requires a light source and mirror?
Auto-Collimation
What requires two telescopes both focused to infinity, to establish a line of sight which is parallel?
Collimation
2 telescopes
Lightsource
When performing a vertical wire alignment, extreme care must be exercised to ensure that the inside micrometer readings are the shortest distance. How is the inside micrometer used?
It’s held against the surface and is swept through an arc, starting out short of the wire and adjusting in one increment segments until continuity is sensed
Which tool would be used to reference a machine’s vertical centerline?
Jig Transit
When using an optical micrometer, the backsight reading is 5.37’ and the foresight reading is 5.74’. What must be done to level these two points?
Add 0.37’ at the foresight
Back sight = Benchmark “the B’s stay together”
The highest measurement is the lowest elevation, the foresight needs to be raised to be level with back sight.
What could be used to ensure the jig transit is in the vertical plane?
Wire and weight held vertically
What is done to permanently mark a reference point in concrete?
Install a brass plug and centre punch
Which of the following laser alignment designs cannot be used if there is dynamic interruption?
Dual laser/Dual detector
