PUNJAB PUBLIC SERVICE COMMISSION Combined Competitive Examination (CCE) 2024 For Recruitment to the Posts of Provincial Management Service (PMS)
SUBJECT: Principle of Engineering (Paper-1) Time Allowed: 3 Hours Maximum Marks: 100
Note: Attempt any FIVE questions in all. Scientific calculator is allowed.
Instructions
Attempt any FIVE questions in all.
Calculator is allowed (not programmable).
Draw clear diagrams where necessary.
All parts must be attempted at one place instead of different pages.
Do not overwrite or cross answers.
Q.1 a) Discuss in detail the Free Electron Model. Explain electron and hole with the help of a diagram. b) What do you understand by the following terms: i) Spherical and chromatic aberration ii) Dispersion and scattering (10 + 10 = 20 Marks)
Q.2 a) Differentiate between miscibility and interactions. b) A 21 g sample of HCl is dissolved in 750 mL of a solvent (density = 1.3 g/mL, molecular weight = 180 g/mol). Assume the volume of HCl is 21 mL. Calculate the solution’s molarity, molality, mole fraction, and mass percentage. (10 + 10 = 20 Marks)
Q.3 a) An alternating voltage is triangular in shape, rising at a constant rate to a maximum value and then falling to zero at a constant rate in 4 ms. The negative half-cycle is identical in shape to the positive half-cycle. Calculate: (i) The mean voltage over one cycle (ii) The RMS voltage
b) If the supply to a circuit is 25 sin(628.3t) volts and the voltage drop across one component is 18 sin(628.3t − 0.52) volts, calculate: (i) The voltage drop across the remainder of the circuit (ii) The supply frequency (iii) The time period of the supply (10 + 10 = 20 Marks)
Q.4 a) What is a P–N junction diode? Explain the working of a diode in forward and reverse biased modes. b) Write notes on the following: i) AM (Amplitude Modulation) ii) FM (Frequency Modulation) iii) Delta modulation iv) ASK (Amplitude Shift Keying) (10 + 10 = 20 Marks)
Q.5 a) With reference to Pakistan, discuss different types of transmission lines in use and the reasons for heavy transmission line losses. b) Describe power network analysis. What is a polyphase system of distributing alternating current (A.C)? (10 + 10 = 20 Marks)
Q.6 a) Some experts believe that two-stroke petrol engines are noisy, inefficient, and a dying technology. What is your opinion? Give reasons to support your answer. b) Describe drilling and gear cutting manufacturing processes. c) What is Gibbs free energy? (10 + 5 + 5 = 20 Marks)
Q.7 a) Compare the electrical and mechanical properties of engineering ceramics. b) What are the basic differences between general-purpose plastics and engineering thermoplastics? (10 + 10 = 20 Marks)
Q.8 a) Write detailed notes on the following: i) Diffusion in ceramics ii) Creep-resistant materials
b) The Young’s moduli of alkali metals are given below (in GN/m²): Li (11.5), Na (9.0), K (3.5), Rb (2.7), Cs (1.8), Fr (1.7). Compare these values with their corresponding melting points and explain the reason for this trend. (10 + 10 = 20 Marks)
SUBJECT: Principle of Engineering (Paper-1) Time Allowed: 3 Hours Maximum Marks: 100
NOTE: Attempt any FIVE questions in all, including Question No. 8 (compulsory). Calculator is allowed (Non-programmable).
Q.1
a) Briefly explain the following concepts: i) Inflation ii) Consumer Price Index (CPI) iii) Marginal Cost iv) Differential Revenue
b) Elaborate on Cost-Volume-Profit (CVP) analysis. Also explain how the profit function can be expressed within this framework. (12 + 8 = 20 Marks)
Q.2
a) A bank provides a loan of $25,000 at an interest rate of 8% per annum (compounded annually). i) Calculate the total amount payable after 5 years. ii) Determine the equal annual installments if repayment is spread over 5 years.
b) An organization wants to determine the book value of an asset after 5 years. Current value = $500,000 Salvage value = $50,000 Useful life = 15 years Using the straight-line depreciation method, calculate the book value after 5 years. (10 + 10 = 20 Marks)
Q.3
Write a comprehensive note on non-destructive testing (NDT) techniques used to detect internal defects in materials/products. Explain methodologies and draw schematics for: i) Magnetic Particle Inspection ii) Dye Penetrant Testing (20 Marks)
Q.4
a) A project-based organization wants to determine project timelines. Using the following data:
Activity
Predecessor
Duration (Weeks)
A
—
4
B
—
6
C
A, B
7
D
B
8
E
B
5
F
C
5
G
D
7
H
D, E
8
I
F, G, H
4
i) Construct the network diagram ii) Identify the critical path iii) Determine the project completion time
b) Explain the testing spectrum and specify the personnel responsible for different types of testing along with general scope. (10 + 10 = 20 Marks)
Q.5
a) In the context of resource loading, differentiate between: i) Time-limited resource scheduling ii) Resource-limited scheduling Provide suitable examples/scenarios.
b) In the context of the quantity discount model, explain how a non-optimal point on the cost curve may still be the most economical option among available discount alternatives. (10 + 10 = 20 Marks)
Q.6
a) Differentiate between the Basic Economic Order Quantity (EOQ) model and the Production Order Quantity (POQ) model. Support your answer with graphical representation.
b) Write short notes on: i) Force Field Analysis ii) Why-Why Analysis (with example) (10 + 10 = 20 Marks)
Q.7
A manufacturing organization is evaluating production strategies to meet demand. Consider:
Month
Demand
Production Days
Jan
800
22
Feb
700
18
Mar
850
21
Apr
1100
21
May
1600
23
Jun
1204
20
Additional Data:
Inventory carrying cost = $8 per unit per month
Subcontracting cost = $25 per unit
Labor wage = $11 per hour ($88 per day)
Labor requirement = 1.6 hours per unit
Evaluate which strategy is more cost-effective: i) Constant workforce for six months ii) Constant workforce for minimum demand + subcontracting
(20 Marks)
Q.8 (Compulsory)
Choose the correct option: (20 Marks)
Pick the correct statement:
(A) The capital required to start a project is the first cost
(B) First cost is a single or series of initial cash flows
(C) First cost of purchasing a car includes down payment, taxes, dealer charges
(D) All of these
In a cash flow series:
(A) Uniform gradient means equal change each period
