PLANT DESIGN Flashcards
Hastelloy consists of
Mo and Ni
Which of the following fluids should be made to flow in the shell-side of a shell-and-tube heat exchanger?
condensing fluids
Based on TEMA Standards, a shell-and-tube heat exchanger with bonnet-type front end, split-flow-type body, and pull-through floating head rear, is of the type
BGT
This symbol, ——– , in detailed equipment flow sheet refers to
instrument line
Fouling factor must be included in the calculation of overall heat transfer coefficient when the liquid
containing suspended solids flow at low velocity
Which of the following is the best tube material from thermal conductivity point of view alone?
copper
Which of the following is an example of functional depreciation?
obsolescence
In case of a continuous distillation column, increase in reflux ratio may result in all of the following except:
lower cost for the reboiler heat supply
Inconel is an alloy of
Fe, Ni, and Cr
The joint efficiency for a seamless pipe is
1
The optimum economic pipe diameter for fluid flow is determined by the
total cost consideration
Concrete tank can be used to store
saturated brine
Which is correct as regard the design of pressure vessels?
design pressure > operating pressure
Biological shield in a nuclear power reactor is made of
concrete
The presence of Mn in steel improves its
abrasion resistance and toughness
A market survey is done to see how the project fits into the company strategy. Which of the following are included in the market survey?
1. market trends
2. price history
3. existing technology
4. competitors
1, 2, 3, 4
Return on investment is
annual net profit / total capital investment
The division of processes into sections are first depicted on the
BFD
P&ID
piping and instrumentation diagram
In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the
Shortest centre to centre distance between adjacent tubes
In case of a continuous distillation column, increase in reflux ratio may result in the
Lower fixed charges for the column
Greater cost for the reboiler heat supply
Greater cost for the condenser coolant
All of the above
All of the above
Hydrochloric acid solution (10% and 95%) and sulfuric acid can be best stored in a vessel lined with
Teflon
Which of the following has the least effect on determining the necessary wall thickness of a metallic storage vessel?
height of the storage tank
A design problem is one whose number of degrees of freedom is
> 0
For any system, what is the minimum number of degrees of freedom?
0
In the design of the shell-and-tube systems, the fluids that is highly corrosive and has fouling tendency should
preferably flow inside the tube for its easier internal cleaning
The first letter in the tag description of controller near a device indicates the
measured variable
Schedule number is an indication of the pipe’s
wall thickness
With increase in number of shell passes, the value of the fudge factor (F)
increases
The power requirement in agitation is proportional to ___, where D is the diameter of the agitator
D^5
The least accurate estimate of a plant design project cost is the
order-of-magnitude estimate
Preliminary design estimate
requires more accurate equipment sizing and layout of equipment, with piping and
instrumentation
A qualitative technique based on guide words to help provoke thoughts about the way deviations from the intended operating conditions can lead to hazardous situations or operability problems
HAZOP
According to heuristics for process equipment design, the most economical method of separating
liquids is
distillation
Which of the following is incorrect?
net profits = revenue - all expenses - income tax
all expenses = cash expenses – depreciation
income tax = (revenue - all expenses)(tax rate)
cash flow = net profits + depreciation
all expenses = cash expenses – depreciation
What is the payback period corresponding to an ROI of 22.5%, assuming a 10-year evaluation period?
3.81 years
The value of a property after depreciation is called
Salvage value
In the design of paddle agitator the paddle diameter to tank diameter ratio is normally taken as
0.8
A cylindrical storage tank can have self-supported conical roof
if its diameter is less than 15 - 20 meters
In the factorial method of cost estimation, of the the fixed capital cost project, Cr, is given as a function of the total purchase equipment cost, Cc, by the equation: Cf=LfCc, where Lf is the Lang factor, which depends on the type of process. What is the value of Lf for predominantly fluids processing plant?
4.7
Which of the following is not part of working capital?
materials-in-process
finished product inventory
transportation facilities
raw materials inventory
transportation facilities
Which of the following is incorrect, in case of a chemical process plant?
Total production cost = manufacturing costs + general expenses
Total production cost = direct production cost + plant overhead cost
Manufacturing cost = direct production cost + fixed cost + plant overhead cost
General expenses = administrative expenses + distribution and marketing expenses
Total production cost = direct production cost + plant overhead cost
The utilities cost in the operation of chemical processing plant are considered
direct production cost
In a manufacturing plant, break-even point occurs when
total annual product cost = total annual sales
Which of the following is at the core or center of the layers of safety protection in chemical plants?
process design
Which of the following ranks highest in the hierarchy of the objectives of automatic process control?
safe plant operation
