Measuring Tapes Flashcards
1
Q
- also known as surveyor’s or engineer’s tape
- made of a ribbon of steel 0.5 to 1.0 cm in width
- weights 0.8 to 1.5 kg per 30 meters
- For most conventional measurements in surveying and engineering work
A
Steel Tape
2
Q
- also called woven tapes
- made of water-proof linen fabric
with woven small brass, copper, or
bronze wires to increase its strength
and reduce stretching - for measuring short distances
A
Metallic Tape
3
Q
- woven from synthetic materials with strong dimensional
stability - coated with a plastic material to reduce effects of moisture,
humidity, and abrasion
A
Non-metallic Tape
4
Q
- made of an alloy of nickel (35%) and steel (65%)
- very low coefficient of thermal expansion (1/30 to 1/60 that of a steel tape)
- “invariable” → less affected by temperature changes than steel tape
- used for precise measurements * 10 times as expensive as ordinary steel tapes
A
Invar Tape
5
Q
- properties and costs between conventional steel tapes
and invar tapes
A
Lovar Tape
6
Q
- woven with fiberglass in a longitudinal and transverse pattern
- does not shrink or stretch with changes in temperature
and humidity - best used in vicinity of electrical equipment
A
Fiberglass Tape
7
Q
- used before thin flat steel tapes were produced
- still used in hydrographic survey
A
Wires
8
Q
- have smaller cross sections and lighter
than steel tape - used in building construction
A
Builder’s Tape
9
Q
- rust-proof tape to use in the vicinity of salt
water
A
Phosphor-Bronze Tape
10
Q
- coated with permanently bonded non- conducting nylon
- resistant to corrosion and immune to rust
A
Nylon-coated Steel Tape
