BC Quiz 4 Flashcards
- An example of a dead load is shown in which one of the following?
Select one:
a. A fire escape
b. 2000 gallons of water in a tank on a roof
c. A heavy, but movable safe
d. A piano on the first floor of a house
(Pg 1)
The correct answer is: A fire escape
- Fire resistance is closely related to mass. All other things being equal, a heavier beam will take longer to fail due to heating than a lighter beam.
Select one:
a. Disagree?
b. Agree
(Pg 1)
The correct answer is: Agree
- Which definition is incorrect?
Select one:
a. Repeated loads are loads applied intermittently
b. Impact loads are loads delivered in a short time
c. Concentrated loads are heavy loads delivered over a large area
d. Static loads are loads applied slowly and remain constant
Concentrated loads are heavy loads located at one point (Pg 2)
The correct answer is: Concentrated loads are heavy loads delivered over a large area
- Structural members under a compressive load will ____ a member?
Select one:
a. Lengthen
b. Shorten
(Pg 2)
The correct answer is: Shorten
05. If a wall is being breached and you find stronger materials in the wall, you are probably under a? Select one: a. Concentrated load b. Distributed load c. Lateral Load d. Impact Load
(Pg 2)
The correct answer is: Concentrated load
- Regarding plywood, it would be correct to state? (More than one correct)
Select one or more:
a. Plywood will delaminate when burning — increasing its surface to mass ratio
b. Plywood has a high rate of heat release
c. A pound of plywood burns many times faster than a pound of heavy timber
(Pg 3)
The correct answers are: A pound of plywood burns many times faster than a pound of heavy timber, Plywood will delaminate when burning — increasing its surface to mass ratio, Plywood has a high rate of heat release
- The chief cause of failure with cast iron is probably?
Select one:
a. Poor connection of floor beams to cast iron columns
b. The casting method
(Pg 4)
The correct answer is: Poor connection of floor beams to cast iron columns
09. Cold drawn steel fails around \_\_\_\_\_\_ degrees Farenheit? Select one: a. 900 b. 700 c. 800 d. 1000
(Pg 4)
The correct answer is: 800
- Using water on steel can cause steel to fail.
Select one:
a. Agree
b. Disagree?
(Pg 4)
The correct answer is: Disagree?
- The strength of steel is?
Select one:
a. Much stronger in tension, than compression
b. Much stronger in compression, than tension
c. Almost equally strong in compression and tension
(Pg 5)
The correct answer is: Almost equally strong in compression and tension
12. The shape of a material, like steel, affects its ability to resist a \_\_\_\_\_\_\_ load? Select one: a. Compressive b. Tensile c. Compressive or Tensile
(Pg 5)
The correct answer is: Compressive
13. Regarding the load carrying capacity of beams, if another 2” x 4” is laid alongside a similar 2” x 4”, the carrying capacity of the two beams as compared with one beam is increased by a factor of? Select one: a. Two b. 4 c. One d. 3
(Pg 5)
The correct answer is: Two
14. Regarding the load carrying capacity of a beam 2” x 4” whose depth is doubled, the 2” by 8” by comparison will have \_\_\_\_\_\_ times the carrying ability of the 2” x 4”? Select one: a. 2 b. 3 c. 1 d. 4 e. 8
(Pg 5)
The correct answer is: 4
- Assuming a uniformly distributed load, as the length of the span (distance between supports) of a beam increases, the safe load capacity decreases _____________?
Select one:
a. In direct proportion to the change
b. To the 2nd power of the change
(Pg 5)
The correct answer is: In direct proportion to the change
16. If a load is concentrated at the center of the beam, the permitted load is \_\_\_\_ the distributed load? Select one: a. One-fourth b. Equal to c. One-half d. One-third
(Pg 5)
The correct answer is: One-half
17. A beam that moves a load laterally when it is not convenient to arrange columns one above the other is known as a \_\_\_\_\_\_\_\_\_\_ beam? Select one: a. Needle b. Transfer c. Lintel d. Cantilever
(Pg 6)
The correct answer is: Transfer
- A cantilever beam is supported at one end only. Beyond the support point the ____?
Select one:
a. Compression is at the top of the beam, and the tension is at the bottom of the beam
b. Tension is at the top of the beam, and the compression is at the bottom of the beam
(Pg 6) The correct answer is: Tension is at the top of the beam, and the compression is at the bottom of the beam Question 19 Incorrect Mark 0.00 out of 1.00 Question text 19. Columns lose strength by?
- Columns lose strength by?
Select one:
a. The square of the increase in their length
b. In direct proportion to the increase in their length
(Pg 6)
The correct answer is: The square of the increase in their length
20. An inefficient shape for a column is a column in the shape of? Select one: a. The letter “H” b. A cylinder c. A box d. The letter “I”
(Pg 6)
The correct answer is: The letter “I”
- Which point is inaccurate regarding columns?
Select one:
a. When columns start to yield, they generally have considerable reserve strength beyond initial yielding
b. The loss of bracing on a column is a cause of column failure
c. Piers - short, squat columns fail by crushing
d. Long, slender columns fail by buckling
they generally have very little reserve strength left (Pg 7)
The correct answer is: When columns start to yield, they generally have considerable reserve strength beyond initial yielding
22. A column braced at its midpoint will increase the carrying capacity of that column to \_\_\_\_\_ times what it was initially? Select one: a. 4 b. 2 c. 8 d. 6
(Pg 7)
The correct answer is: 4
23. The top chord of a truss is under? Select one: a. Tension and acts like a beam b. Tension and acts like a column c. Compression and acts like a column d. Compression and acts like a beam
(Pg 7)
The correct answer is: Compression and acts like a column
- Which will fail more suddenly?
Select one:
a. A Beam
b. A Column
(Pg 8)
The correct answer is: A Column
25. Which of the following are examples of wall bracing? (More than one correct) Select one or more: a. Buttresses b. Wall columns c. Pilasters
(Pg 9)
The correct answers are: Buttresses, Pilasters, Wall columns
