AERO GATE TOPPER
General Instructions:
- The total duration of the examination is 45 minutes .
- The clock will be set on the server. The countdown timer in the top right corner of the screen will display the remaining time available for you to complete the examination. When the timer reaches zero, the examination will end by itself. You will not be required to end or submit your examination.
- To answer a question, do the following:
Navigating to a Question:
- To answer a question, do the following:
- Click on the question number in the Question Palette to go to that question directly.
- Select an answer for a multiple-choice type question. Use the virtual numeric keypad to enter a number as the answer for a numerical-type question.
- Click on Save and Next to save your answer for the current question and then go to the next question.
- Caution: Note that your answer for the current question will not be saved, if you navigate to another question directly by clicking on its question number.
- You can view all the questions by clicking the Question Paper button. Note that the options for multiple-choice type questions will not be shown.
- Procedure for answering a multiple choice type question:
- To select your answer, click on the button on one of the options
- To deselect your chosen answer, click on the button of the chosen option again
- To change your chosen answer, click on the button of another option
- To save your answer, you MUST click on the Save and Next button
- Procedure for answering a numerical answer type question:
- To enter a number as your answer, use the virtual numerical keypad
- A fraction (eg.,-0.3 or -.3) can be entered as an answer with or without ‘0’ before the decimal point
- To clear your answer, click on the Clear button
- To save your answer, you MUST click on the Save and Next button
- To change your answer to a question that has already been answered, first select that question for answering and then follow the procedure for answering that type of question.
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×Torsion
AERO GATE TOPPER
1. A solid circular shaft of 50 mm diameter and 1.2 m length is subjected to a torque of 300 Nm. If the shear modulus (G) is 80 GPa, calculate the angle of twist (in degrees). Use one decimal place.
2. A hollow circular shaft with outer diameter of 60 mm and inner diameter of 40 mm is subjected to a torque of 500 Nm. Calculate the maximum shear stress in the shaft (in MPa). Use two decimal places.
3. Which of the following statements is true about torsion in non-circular shafts?
4. A shaft is transmitting 20 kW of power at 1500 rpm. Calculate the torque transmitted by the shaft (in Nm). Use two decimal places.
5. Which of the following factors affect the maximum shear stress in a shaft subjected to torsion?
6. A hollow circular shaft with an outer diameter of 80 mm and an inner diameter of 50 mm is 2 m long. If a torque of 600 Nm is applied and the shear modulus (G) is 75 GPa, calculate the angle of twist (in degrees). Use two decimal places.
7. What does the polar moment of inertia in torsion problems indicate?
8. A hollow circular shaft has an outer diameter of 90 mm and an inner diameter of 60 mm. If a torque of 800 Nm is applied, calculate the maximum shear stress in the shaft (in MPa). Use two decimal places.
9. Which of the following parameters directly affect the torsional stiffness of a shaft?
10. A shaft transmits a power of 50 kW at 2000 rpm. Calculate the torque transmitted by the shaft (in kNm). Use two decimal places.
11. Which of the following sections experiences uniform stress distribution under torsion?
12. A solid circular shaft of diameter 50 mm and length 1 m is subjected to a torque of 200 Nm. Calculate the strain energy stored in the shaft (in kJ). Use four decimal places.
13. Which of the following is a unique characteristic of torsion in non-circular sections?
14. A shaft transmits a power of 40 kW at 1200 rpm. Calculate the torque transmitted by the shaft (in Nm). Use one decimal place.
15. In thin-walled sections under torsion, which of the following statements is true?
Numeric Keypad
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