Material Selection Flashcards
7 cards from real CST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Material Selection flashcards as text
Which leveling rod material is preferred for precise leveling because of its low thermal expansion?
Answer: Invar
Invar has a very low coefficient of thermal expansion, giving precise rod graduations.
Why are fiberglass rods often chosen over aluminum rods near overhead power lines?
Answer: They are non-conductive
Fiberglass does not conduct electricity, reducing electrocution risk.
Which tape material is most appropriate for precise distance measurement when temperature corrections are a concern?
Answer: Steel tape with temperature correction applied
Steel tapes are precise, and known thermal expansion allows accurate temperature corrections.
Which type of tape is best for measuring near energized electrical lines?
Answer: Non-conductive fiberglass tape
Fiberglass tapes are non-conductive and safer near electrical hazards.
A survey crew needs to set a monument in a roadway intersection that will be paved over. What is a common solution?
Answer: Monument with a cast-iron monument box (riser) and cover
Monument boxes protect the point and allow access after paving.
Which material is commonly used for a prism pole because it is lightweight yet rigid?
Answer: Aluminum or carbon fiber
Aluminum and carbon fiber offer the strength-to-weight ratio needed for prism poles.
When selecting a tripod for high-precision work in hot sun, which construction minimizes thermal twisting?
Answer: Wooden or composite legs
Wood and composite tripods are less affected by heat-induced expansion and twisting than aluminum.