ASSIGNMENT QUESTIONS - 14071_589
Home
Download PDF
Order CD-ROM
Order in Print
ASSIGNMENT QUESTIONS - 14071_588
ASSIGNMENT QUESTIONS - 14071_590
Engineering Aid 2 - Intermediate Structural engineering guide book
Page Navigation
557
558
559
560
561
562
563
564
565
566
12-9.
When you perform the flexural-
strength tests for a mix design,
how many samples should be broken
at 7 days?
1.
Five
2.
T
WO
3.
Three
4.
Four
12-10.
If the beam sample is too rough
for a proper seat to be formed
by the load surface, what action
should be taken?
1.
Grind the surface
2.
Use another beam
3.
Cap the surface
4.
Shift the beam to achieve
proper contact
12-11.
An average width and depth should
be obtained before performing the
flexural-strength test.
1.
True
2.
False
Figure 12A
IN ANSWERING QUESTIONS 12-12 THROUGH
12-14, REFER TO FIGURE 12A.
12-12.
What is the modulus of rupture for
the beam if P = 4,000 pounds,
b = 6 inches, and the
fracture
occurs at point B?
1.
61.6 psi
2.
123.5 psi
3.
172.8 psi
4.
379.6 psi
12-13.
What is the modulus of rupture
for the beam if P = 6,000 pounds,
b = 4 inches, and the
fracture
occurs at point C?
1.
250.0 psi
2.
277.8 psi
3.
388.9 psi
4.
583.3 psi
12-14.
If the beam ruptures at point A
under a load of 5,000 pounds, the
test results should be computed
by which, if any, of the following
formulas?
12-15.
The flexural strength of a test
beam is 625 pounds per square
inch. What is the approximate
compressive strength of the
concrete?
1.
3,700 psi
2.
3,800 psi
3.
3,900 psi
4.
4,000 psi
12-16.
The rebound method uses a hammer
to test what strength of the
concrete?
1.
Compressive
2.
Shear
3.
Flexural
4.
Load bearing
12-17.
The pullout-test method is
correlated
with compressive
strength to determine what
information?
1.
In-place strength
2.
Flexural strength
3.
Load-bearing capacity
4.
Curing time
83
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business