Machine Design
JKSSB Junior Engineer (Mechanical) · Technical Subjects (Mechanical) · 14 practice questions with answers and explanations: 1 Easy, 13 Medium, 0 Hard.
Sample questions
Sample Easy question 1
A key is used to:
- Lock a nut
- Transmit torque between a shaft and a hub
- Reduce vibration
- Support the shaft
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Answer: B. It sits in a keyway cut in the shaft and hub.
Sample Medium question 2
In the design of a shaft, the maximum shear stress theory is also known as:
- Guest's (Tresca) theory
- Rankine's theory
- Von Mises theory
- Saint-Venant's theory
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Answer: A. It is widely used for ductile materials.
Sample Medium question 3
The theory of failure most suitable for brittle materials is:
- Maximum principal stress (Rankine) theory
- Maximum shear stress theory
- Distortion energy theory
- Maximum strain energy theory
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Answer: A. It assumes failure when the principal stress reaches the strength.
Sample Medium question 4
The pitch of a single-start thread is equal to:
- Its diameter
- Twice its lead
- Half its lead
- Its lead
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Answer: D. Lead = pitch × number of starts.
More Technical Subjects (Mechanical) topics for JKSSB Junior Engineer (Mechanical)
- Engineering Materials
- Engineering Mechanics
- Fluid Mechanics
- Heat Transfer
- Hydraulics and Pneumatics
- IC Engines
- Industrial Engineering
- Machining
- Manufacturing Processes
- Metrology
- Power Plants
- Refrigeration and AC
- Strength of Materials
- Theory of Machines
- Thermodynamics