Mettl Technical Aptitude 5 — Questions and Answers
Question 1: A car engine produces 150 kW of power. How much work does it do in 30 seconds?
- 5 kJ
- 4,500 kJ (Correct answer)
- 450 kJ
- 50 kJ
Correct answer: 4,500 kJ
Work = Power × Time = 150,000 W × 30 s = 4,500,000 J = 4,500 kJ.
Question 2: In a computer network, what does the OSI model's 'Transport' layer primarily handle?
- Physical signal transmission
- Routing packets between networks
- End-to-end communication and data segmentation (Correct answer)
- Encrypting user data
Correct answer: End-to-end communication and data segmentation
The Transport layer (Layer 4) manages end-to-end communication, reliability, and segmentation of data using TCP or UDP.
Question 3: What type of force acts on an object moving in a circular path, directed toward the center?
- Centrifugal force
- Centripetal force (Correct answer)
- Gravitational force
- Normal force
Correct answer: Centripetal force
Centripetal force acts toward the center of the circular path, keeping the object in its curved trajectory.
Question 4: Which sorting algorithm has an average time complexity of O(n log n)?
- Bubble Sort
- Selection Sort
- Merge Sort (Correct answer)
- Insertion Sort
Correct answer: Merge Sort
Merge Sort divides the array recursively and merges sorted halves, achieving O(n log n) average and worst-case time complexity.
Question 5: A beam is supported at both ends and loaded in the center. Where does the maximum bending moment occur?
- At the supports
- At the center of the beam (Correct answer)
- At one-quarter of the span
- At three-quarters of the span
Correct answer: At the center of the beam
For a simply supported beam with a central point load, the maximum bending moment occurs at the midpoint of the beam.
Question 6: What is the function of a capacitor in a DC circuit after it is fully charged?
- It acts as a short circuit
- It allows current to flow continuously
- It blocks DC current flow (Correct answer)
- It amplifies the voltage
Correct answer: It blocks DC current flow
A fully charged capacitor blocks DC current because no further charge can accumulate across it under steady-state DC conditions.
Question 7: Which type of software testing verifies that individual components or functions work correctly in isolation?
- Integration testing
- System testing
- Unit testing (Correct answer)
- Regression testing
Correct answer: Unit testing
Unit testing validates individual functions or modules in isolation to confirm each piece of code behaves as expected.
Mettl Technical Aptitude 5
A car engine produces 150 kW of power.
How much work does it do in 30 seconds?