GATE→2026→Plant Design and Economics→Plant Design and Economics
Q1
MSQ[1 Mark]
Which of the following methods for calculating profitability does/do NOT consider the time value of money?
GATE→2026→Plant Design and Economics→Plant Design and Economics
Q2
MCQ[2 Marks]
In a certain project, 15% of the total investment is the working capital. The minimum acceptable rate of return is 4.95% and the period of evaluation is 15 years. Which one of the following is the maximum acceptable project payback period (in years)?
GATE→2025→Plant Design and Economics→Plant Design and Economics
Q3
MCQ[1 Mark]
The capital cost (CC) of an industrial equipment varies with its capacity (S) as CC∝Sβ. The rule-of-thumb value of the exponent β is
GATE→2025→Plant Design and Economics→Plant Design and Economics
Q4
NAT[2 Marks]
It is proposed to install thermal insulation... yearly saving 20 thousand rupees, installation cost 150 thousand rupees, life 12 years, 9% interest rate. Minimum salvage value is ______ thousand rupees (rounded off to nearest integer).
GATE→2024→Plant Design and Economics→Plant Design and Economics
Q5
NAT[1 Mark]
Distillation column cost 90 lakhs. Depreciated using double-declining balance method over 10 years. Book value after 2 years is ______ lakhs of rupees.
GATE→2024→Plant Design and Economics→Plant Design and Economics
Q6
MCQ[2 Marks]
For purchasing a batch reactor, three alternatives P, Q and R. For compound interest rate 10% per annum, arrange alternatives from least to most expensive.
GATE→2023→Plant Design and Economics→Plant Design and Economics
Q7
NAT[2 Marks]
Membrane module options M1 and M2. Difference in Net Present Value (NPV) over 7 years at 8% interest is lakhs of rupees.
GATE→2023→Plant Design and Economics→Plant Design and Economics
Q8
NAT[2 Marks]
Distillation column purchase cost 10 lakhs, installation factor 5.8. Annual cost of installed capital over 6 years at 5% interest is lakhs of rupees.
GATE→2023→Plant Design and Economics→Plant Design and Economics
Q9
NAT[2 Marks]
Pumps A and B economic details given. For equal capitalized cost at 10% interest, salvage value of pump B is Rs.
GATE→2022→Plant Design and Economics→Plant Design and Economics
Q10
MCQ[1 Mark]
Simple distillation column TAC variation with reflux ratio. Select statement that is NOT CORRECT.
GATE→2022→Plant Design and Economics→Plant Design and Economics
Q11
NAT[1 Mark]
Compressor capital cost 10 lakhs, operating cost 0.5 lakh/yr, 10-year life, 8% interest. Amount needed to fund perpetual operation is lakhs.
GATE→2022→Plant Design and Economics→Plant Design and Economics
Q12
NAT[2 Marks]
Project investment, revenue, manufacturing cost, 10% interest, 30% tax, double declining balance depreciation over 7 years. Discounted cash flow for fourth year is crores.