Two limestones (LS1 and LS2) have LoI (loss on ignition) values as 40% and 33%, respectively. a) Calculate the total amount (%) of impurities in these limestones; b) State which of the quicklimes obtained from these limestones slakes faster.

Poplar wood contains 50% cellulose. Pure cellulose extracted from wood can enzymatically be converted to glucose C₆H₁₂O₆ with 90% efficiency.

1. Write down a balanced chemical reaction for the conversion of glucose to ethanol (CH₃CH₂ OH).
2. Use this equation to calculate the theoretical yield of ethanol from one-ton of poplar wood.
3. Calculate the actual yield of ethanol from one-ton of poplar wood if the fermentation efficiency (glucose to ethanol) is 95%.
4. Determine the gasoline equivalent of ethanol in part C above.

There are four critical paths in a network. A-B-C-D-E, A-F-E, A-B-H-J-K-E and A-S-T-E. Each activity in this network can be crashed by a maximum of 2 weeks. The crashing cost (per week), for the first week, for activity A is: $540, E is $545 and all other activities is : $135 (per week per activity). The crashing cost, second week and onwards, for activity A is $1080 per week, E is $1350 per week and for all other activities is $405 per activity per week. You have a maximum crashing budget of $2300. The maximum possible reduction in the project duration will be:

Select one:

a. 3 weeks

b. 4 weeks

c. 5 weeks

d. 1 week

e. 2 weeks

Soda and lime are added to glass batch in the form of soda ash (Na₂CO₃) and limestone (CaCO₃). During heating, these two ingredients decompose to give off carbon dioxide (CO₂), the resulting products being soda and lime. Compute the weight of soda ash and limestone that must be added to 170 lb_m of quartz (SiO₂) to yield a glass of composition 78 wt% SiO₂, 15 wt% Na₂O, and 7 wt% CaO.

Part 1

You are to compute the weight (in lb_m) of soda ash and limestone that must be added to a certain amount of quartz to produce a particular glass composition.First, compute the lb_m of both Na₂O and CaO that is necessary for the particular glass composition that is given in the problem.

What is the weight in lb_m of:

(a) Na₂O

(b) CaO

Part 2

What is the molecular weight in g/mol of the following:

(a) Na₂O

(b) Na₂CO₃

(c) CaO

(d) CaCO₃

Part 3

Finally, convert the lb_m of Na₂O and CaO to the pounds (mass) of soda ash and lime that will need to be added to the SiO₂.

What is the weight, in lb_m, of (a) soda ash and (b) lime that will be added to the SiO₂ to make the glass outlined in the problem?

Piles are driven with hammers that are mounted on cranes. There are several commonly used hammer types to install piles. List at least two hammer types with brief explanation about its function and usage (DO NOT copy and paste contents from lecture slides. Use your own words.)

please type answer don't scan

The code of ethics of the American Institute of Constructors' use depends on the extent to which members of the profession abide by it in practice.

A single-storey brick veneer house (single layer of brick on a timber frame) has a front corner lounge-room with a floorplan measuring 4.0 m by 3.8 m. The ceiling is 3.0 m high. The building fabric of the two exterior walls comprises a 12 mm thick layer of plaster, a 100 mm air gap and the exterior house bricks (110 mm thick). One of these walls has a window measuring 2.7 m wide by 1.35 m high, featuring a 3-mm thick glass pane installed in the mid-1950s. The floor is carpet over 19 mm thick pine floorboards, and the house is on stumps with a ventilated air gap between the ground and the floorboards. The ceiling is 12 mm plasterboard covered with a 50 mm thick layer of loose fill insulation in the roof cavity. This house is located in suburban Melbourne.

Based on your own research into pricing for retrofitting double glazing, modern insulating single-glazing, adding ceiling or under-floor insulation, or other measures, what would be the most cost-effective strategy for improving the heat retention of the room? Show calculated results for at least three alternatives.

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IOT (internet of things ) Applications in construction   ..

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