TMU Practical Evaluations 3 — Questions and Answers
Question 1: In a TMU electrical engineering practical, what instrument measures electrical resistance in a circuit?
- Ohmmeter (Correct answer)
- Voltmeter
- Ammeter
- Wattmeter
Correct answer: Ohmmeter
An ohmmeter measures resistance in ohms; the other instruments measure voltage, current, and power respectively.
Question 2: A TMU architecture student is presenting a scale model. If the scale is 1:50, and a wall in the model is 4 cm long, how long is the actual wall?
- 200 cm (Correct answer)
- 50 cm
- 400 cm
- 100 cm
Correct answer: 200 cm
Multiplying the model length (4 cm) by the scale factor (50) gives 200 cm, or 2 meters, for the actual wall length.
Question 3: During a TMU chemistry practical, a student must dilute a concentrated acid. What is the safe procedure?
- Add acid slowly to water while stirring (Correct answer)
- Add water to acid quickly to reduce heat
- Mix equal parts acid and water simultaneously
- Dissolve the acid in an organic solvent first
Correct answer: Add acid slowly to water while stirring
Always add acid to water (not water to acid) because the heat generated is absorbed by the larger water volume, preventing dangerous spattering.
Question 4: In a TMU communications practical, what does signal-to-noise ratio (SNR) measure?
- The ratio of useful signal power to background noise power (Correct answer)
- The frequency range of a transmitted signal
- The delay between signal transmission and reception
- The maximum data rate of a communication channel
Correct answer: The ratio of useful signal power to background noise power
SNR compares the level of a desired signal to the level of background noise, with higher SNR indicating cleaner signal quality.
Question 5: When conducting a TMU social science practical involving human participants, which ethical requirement is paramount?
- Obtaining informed consent from all participants (Correct answer)
- Ensuring a minimum of 30 participants for statistical validity
- Recording all sessions for later analysis
- Keeping participant identity known to the full research team
Correct answer: Obtaining informed consent from all participants
Informed consent is the foundational ethical requirement ensuring participants understand the study and voluntarily agree to take part.
Question 6: In a TMU graphic design practical, what is the purpose of a mockup?
- To visualize how a design will look in a real-world context (Correct answer)
- To provide final print-ready artwork to a client
- To calculate the cost of production materials
- To identify typographic errors in the final design
Correct answer: To visualize how a design will look in a real-world context
A mockup places a design into a realistic context (e.g., a phone screen or billboard) so stakeholders can preview the final appearance before production.
Question 7: A TMU mechanical engineering practical requires calculating torque. If a force of 20 N is applied at a distance of 0.5 m from the pivot, what is the torque?
- 10 N·m (Correct answer)
- 20 N·m
- 40 N·m
- 0.5 N·m
Correct answer: 10 N·m
Torque equals force multiplied by the perpendicular distance from the pivot: 20 N × 0.5 m = 10 N·m.
TMU Practical Evaluations 3
In a TMU electrical engineering practical, what instrument measures electrical resistance in a circuit?