BC Quiz 4

Question 1

1. 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

Answer 1

(Pg 1)

The correct answer is: A fire escape

Question 2

2. 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

Answer 2

(Pg 1)

The correct answer is: Agree

Question 3

3. 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

Answer 3

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

Question 4

4. Structural members under a compressive load will ____ a member?
   Select one:
   a. Lengthen
   b. Shorten

Answer 4

(Pg 2)

The correct answer is: Shorten

Question 5

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

Answer 5

(Pg 2)

The correct answer is: Concentrated load

Question 6

7. 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

Answer 6

(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

Question 7

8. 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

Answer 7

(Pg 4)

The correct answer is: Poor connection of floor beams to cast iron columns

Question 8

09. Cold drawn steel fails around \_\_\_\_\_\_ degrees Farenheit?
Select one:
a. 900
b. 700
c. 800
d. 1000

Answer 8

(Pg 4)

The correct answer is: 800

Question 9

10. Using water on steel can cause steel to fail.
    Select one:
    a. Agree
    b. Disagree?

Answer 9

(Pg 4)

The correct answer is: Disagree?

Question 10

11. 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

Answer 10

(Pg 5)

The correct answer is: Almost equally strong in compression and tension

Question 11

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

Answer 11

(Pg 5)

The correct answer is: Compressive

Question 12

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

Answer 12

(Pg 5)

The correct answer is: Two

Question 13

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

Answer 13

(Pg 5)

The correct answer is: 4

Question 14

15. 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

Answer 14

(Pg 5)

The correct answer is: In direct proportion to the change

Question 15

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

Answer 15

(Pg 5)

The correct answer is: One-half

Question 16

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

Answer 16

(Pg 6)

The correct answer is: Transfer

Question 17

18. 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

Answer 17

(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?

Question 18

19. 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

Answer 18

(Pg 6)

The correct answer is: The square of the increase in their length

Question 19

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”

Answer 19

(Pg 6)

The correct answer is: The letter “I”

Question 20

21. 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

Answer 20

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

Question 21

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

Answer 21

(Pg 7)

The correct answer is: 4

Question 22

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

Answer 22

(Pg 7)

The correct answer is: Compression and acts like a column

Question 23

24. Which will fail more suddenly?
    Select one:
    a. A Beam
    b. A Column

Answer 23

(Pg 8)

The correct answer is: A Column

Question 24

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

Answer 24

(Pg 9)

The correct answers are: Buttresses, Pilasters, Wall columns