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Home Question Bank Engineering Archive 2025 January 14

Engineering Questions from Jan 14,2025

Browse the Engineering Q&A Archive for Jan 14,2025, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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4. What non-destructive testing method uses sound waves to detect cracks and flaws? a) Magnetic particle inspection b) Radiographic inspection c) Fluorescent inspection d) Ultrasonic inspection. What non-destructive inspection method can measure the wall thickness of closed vessels? a) Radiographic method b) Ultrasonic method c) Fluorescent penetrant method d) Magnetic particle method Non-destructive Evaluation Activity 1. What two non-destructive tests can detect flaws and cracks deep inside a workpiece? a) Radiographic and penetrant tests b) Ultrasonic and penetrant tests (c) Radiographic and ultrasonic tests d) Ultrasonic and magnetic particle tests Specifications call for drilling a hole \( 0.636 \pm 0.005 \) in. in diameter. Will a \( \frac{41}{64} \)-in. hole be within the required tolerance? Will a \( \frac{41}{64} \)-in. hole be within the required tolerance? Yes No (15) A force of magnitude \( 2 \sqrt{17} \) force unit acts in the coordinate plane and the equation of its line of action is \( y-4 x=12 \), then the norm of the moment force about the origin point is \( \ldots . \). moment unit. \( \begin{array}{llll}\text { (a) } 24 & \text { (b) } 26 & \text { (c) } 24 \sqrt{17} & \text { (d) } \sqrt{17}+3\end{array} \) ii. Constant pressure ycle In a gas turbine unit, air is drawn at.I bar and \( 20^{\circ} \mathrm{C} \) and compressed to 6 bar. maximum cycle temperature is \( 850^{\circ} \mathrm{C} \). Determine each of the following for an constant pressure cycle (2marks) (1. Thermal efficiency ii. Work ratio (10marks) (iii. Entropy change per kg iv. Heat rejected per kg a) Sketch the T-S diagram which represents each of the following cycles in a power plant i. Carnot cycle 2 marks) ( 2 marks) ii. Constant pressure cycle b) In a gas turbine unit, air is drawn at I bar and \( 20^{\circ} \mathrm{C} \) and compressed to 6 bar. The maximum cycle temperature is \( 850^{\circ} \mathrm{C} \). Determine each of the following for an ideal constant pressure cycle i. Thermal efficiency ii. Work ratio (2marks) iii. Entropy change per kg (10marks) iv. Heat rejected per kg (2marks) ( 2 marks) 0. Corrective action in a control system is brought about by some type of error. What ar three(3) possible causes of errors? ( 3 marks)
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