B
Name _
FIRST HOUR EXAMINATION - TAM 324/CEE300
Friday February 16, 2007 Work all problems in spaces provided One page of hand-written notes permitted.
1. (10 points) Nitrogen gas can be used to improve the properties of steel. A sheet of steel
Sarah Kim
CEE300/TAM324
HW30
4/15/16
a) Describe briefly the microstructure of softwood and hardwood.
b) Mention which microstructural feature is responsible for the
i)
possibly higher density of hardwood compared to softwood
ii)
higher variability of pro
Sarah Kim
CEE300/TAM324
HW28
4/13/16
Consider a concrete mixture shown in the table below that has been tested to give a 28-day
compressive strength of 5330 psi.
Constituent
Cement
Water
Fine Aggregate
Coarse Aggregate
Weight (lb)
560
260
1200
1900
Specif
Sarah Kim
CEE300/TAM324
HW27
4/11/16
A blend of 40% fine aggregate and 60% coarse aggregate has a bulk density of 1920 kg/m3. If the
specific gravity of the fine aggregate is 2.60 and that of the coarse aggregate is 2.70,
(a) Compute the volume percent of
Sarah Kim
CEE 300/TAM 324
HW 21
03/28/16
Consider the isothermal transformation curves (TTT diagram) for eutectoid steel. Estimate the material phases
and microstructure expected to form due to the following thermal processing:
(a) heated to 800 C for a l
Sarah Kim
CEE300/TAM324
HW25
4/6/16
The table below shows the sieve analysis results for an aggregate sample.
a) Calculate the cumulative percent passing for each sieve
b) Plot the results on a properly formatted size distribution curve.
Sieve (mm)
4.75
2
Sarah Kim
CEE300/TAM324
HW26
04/08/16
1) Using various sources such as the Compass2G Handout, your textbook, and Google online
sources even Wikipedia, determine typical mean diameters for cement particles, sand particles,
and coarse aggregate particles us
Sarah Kim
CEE300/TAM324
HW24
4/3/16
The modulus of elasticity of boron carbide (B4C) having 5% volume porosity is 290 GPa.
(a) Compute the modulus of elasticity for non-porous B4C.
(b) At what volume percent porosity will the modulus of elasticity for B4C
Sarah Kim
CEE 300/ TAM 324
HW 22
03/30/16
1) A steel contains 8% cementite and 92% ferrite at room temperature. Estimate the carbon
content of the steel. Is the steel hypoeutectoid or hypereutectoid?
2) A steel contains 18% cementite and 82% ferrite at ro
A
Name _
SECOND HOUR EXAMINATION - TAM 324/CEE300
Wednesday March 7, 2007 Work all problems in spaces provided One page of hand-written notes permitted.
1. (15 points) Assume a single-crystal BCC material. (a)(5pts) Sketch the BCC crystal unit c
Sarah Kim
CEE300/TAM324
HW29
4/15/16
Use an internet search to find information about design of reinforced concrete structures.
Answer the following questions:
a) Which factors affect the location of rebar in Reinforced Concrete structures?
b) How much co