Past Papers Chemical Plant Design

By: Prof. Fazal Rehman Shamil

Guess Paper 1: Chemical Plant Design Fall – 2020 Past Papers

University Name – Confidential

Time Allowed: 3 hours

Total Marks:    70, Passing Marks (35)

Q.1 Attempt the following MCQs: 7*2=14
1. Two iron pipes of the same nominal diameter but different schedule no; will have the same
a) inside diameter b)None of these c)wall thickness d)outside diameter
2. Tube height in a calendria type evaporator is normally less than __________ meters.
a) 3.5 b) 1 c) 5.5 d) 2
3. ‘Safety factor’ in equipment design is defined as the ratio of the ___________
a) Ultimate stress to breaking stress b) working stress to ultimate stress
c) ultimate stress to working stress d) none of these
4. ______ tray arrangement is recommended for distillation column having diameter upto 4 ft.
a) Radial flow b) Cross flow c) Split flow d) Cascade
5. The operating pressure drop range in a bag filter is about __________ mm water gauge.
a) 50-150 b) 500-1500 c) 5-10 d) 1500-2500
6. Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is
a) Less b) twice c) more d) same
7. Speed of the drum of the rotary vacuum filter normally ranges from __________ rpm.
a) 8-15 b) 5-7 c) 0.1 -2 d) 3-8
Q.2: Explain how the design engineer treats, water pollution by different methods.
What are the necessary factors involved in the designing of shell and tube heat exchanger? 7+7
Q. 3: A plant produces refrigerators at the rate of P units /day. The variable fixed cost per refrigerator has been found tobe 47.73+0.1P1.2 .The total daily fixed charges are 1750 dollars and all other expenses are constant at 7325 dollars/day. If the selling price/refrigerator is 173 dollars. Determine:
(a) The daily profit at a production schedule giving the minimum cost/refrigerator.
(b)The daily profit at a production schedule giving the maximum daily profit. 7+7
Q.4: Enlist the items that should be considered in the feasibility survey report.
Explain the types of design. 6+8

Q.5: Write four advantages and disadvantages of Continuous and Batch operation
Explain the types of a flow diagrams. 4+10

Q.6: Define Depreciation.
Explain shortly, the methods used for calculating depreciation. 4+10

Q.7: Write short notes on any two of the following: 7+7
i. The basic theory of heat transfer
ii. LMTD iii. Break-even Chart

Guess Paper 2: Chemical Plant Design Spring- 2020 Past Papers

University Name – Confidential

Time Allowed: 3 hours

Total Marks:    70, Passing Marks (35)

Question No: 01 Attempt the following MCQs:
i. The stress developed in a material without any permanent set is called the ____________. A: ultimate stress B: yield stress C: elastic limit D: breaking stress.
ii. In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the ______________ .A: O.D. of the tube for square pitch B: the shortest distance between two adjacent tube holes C: shortest center to center distance between adjacent tubes D: none of these.
iii. Needle valves are generally not used for ____________ A: very large diameter pipes B: high-pressure throttling service C: very accurate flow control D: smaller sizes of pipe.
iv. Saddle supports are used for supporting __________ vessels. A: horizontal cylindrical B: tall vertical C: thick-walled vertical D: thick spherical
v. Optimum reflux ratio in a continuous distillation column is determined by the _____________. A: maximum permissible vapor velocity B: flooding limit of the column. C: total cost consideration D: none of these.
vi. An underdesigned steam trap wills _____________. A: waste steam B: destroy itself of acceleration wear due to rapid recycling C: back up condensate and cause water hammer in steam line D: none of these.
vii. __________ Strain is measured using a ‘strain rosetter’. A: Volumetric B: Shear C: Linear D: none of these.
Question No: 02 14
1- Describe stepwise Accumulation and Inventory accounts with examples relating to the designing of valves or Shell and Tube heat exchanger.
Question No: 03
1- Write five differences between batches and continue process. 04
2- Define scale up and explain factors scale up factors in equipment designing. 10
Question No: 04
1- Define and Explain the following cost estimation terms: A: Capital cost B: Cash flow diagram C: Production and raw material cost D: Capital Investment. 2+2+2+2=8
2- Write the key factors involve in Management accounting and Tax Accounting. 3+3= 6
Question No: 05
1- Explain FIFO method of Cost Accounting for designing of Heat exhanger. 10
2- What is the relationship between nominal and effective interest rate. 04

Question No: 06
1- Write Types of the process flow diagrams and their importance in designing. 7
2- Write five factors effecting on the profitability of the investment. 7
Question No: 07 Write short notes on any two of the following: 7+7=14
1. Write the basic designing procedure for Shell and Tube Heat Exchanger.
2. Define the arbitrary method and decline method.
3. Write and explain the type of heat exchanger with a possible diagram.

Prof. Fazal Rehman Shamil