MACHINE DESIGN: PAST BOARD EXAM PROBLEMS CHAPTER 7 - THREADED MEMBERS - BOLTS

MACHINE DESIGN

PAST BOARD EXAM PROBLEMS

CHAPTER 7: THREADED MEMBERS BOLTS

1. If the pitch of a screw is 4/9, find the thread per inch.
2. Determine the stressed area in in2 of a 1 – 8UNC bolt
3. Determine the stressed area in mm2 of an M16 x 2 bolt
4. What is the working strength of a 2 inches bolt which is screwed up tightly in a packed joint when the allowable working stress is 12,000 psi?
5. An eyebolt is lifting a block weighing 350 lbs. The eyebolt is of SAE C1040 material with Su = 67 ksi and Sy = 55 ksi, what is the stress area (square inches) of the bolt if it is under the unified coarse thread?
6. The manhole cover of an ammonia storage tank is to be held on by 25 stud bolts. If the pressure inside the storage tank will remain constant at 12.5 kg/cm2 and the manhole diameter is 508 mm, what should be the stress area of the carbon steel bolts?
7. Determine the power transmitted per ½” set screw of a shaft rotating at a speed of 1,000 rpm with a diameter of 1”.

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