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
A technician needs to mark a control point on a concrete sidewalk. Which marker is most appropriate?
Answer: Drill hole with a brass or aluminum disk set in epoxy
Disks epoxied into drilled holes are durable, precise points on concrete.
Why is aluminum often preferred over plain steel for monument caps?
Answer: It resists corrosion and can be stamped clearly
Aluminum resists rust and holds legible stamped information for many years.
Which stake is commonly used for slope stakes and grade stakes on construction sites, with information written on its face?
Answer: Lath or 1x2/2x2 wooden stakes
Wooden lath and stakes provide a writable surface for cut/fill and station information.
What type of marker should be used to label wooden stakes so the writing remains legible in rain?
Answer: Permanent lumber crayon or waterproof marker
Lumber crayons and waterproof markers resist rain and remain readable on wood.
In areas with deep frost penetration, what is the main concern when choosing a monument's length?
Answer: It must extend below the frost line to resist heaving
Monuments set above the frost line can be heaved out of position by freeze-thaw cycles.
Which material is least suitable for marking a point intended to last through a multi-year construction project?
Answer: Wooden lath with flagging
Wooden lath decays and is easily disturbed, so it serves only short-term purposes.
Plastic caps on rebar monuments are generally chosen because they are:
Answer: Inexpensive, non-corroding, and can be stamped or embossed
Plastic caps are low-cost and rust-proof, though less durable than aluminum against impact.