Strength of Materials

291. When a rectangular beam is loaded longitudinally, shear develops on

1. Bottom fibre
2. Top fibre
3. Middle fibre
4. Every-horizontal plane

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292. When a rectangular beam is loaded transversely, the maximum compressive stress develops on

1. Bottom fibre
2. Top fibre
3. Neutral axis
4. Every cross-section

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293. When equal and opposite forces applied to a body, tend to elongate it, the stress so produced, is called

1. Shear stress
2. Compressive stress
3. Tensile stress
4. Transverse stress

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294. When loads are applied proportionately to a frame structure containing its members in one plane, the structure is called

1. Grid frame
2. Plane frame
3. Space frame
4. Truss frame

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295. When trying to turn a key into a lock, following is applied

1. Coplanar force
2. Non-coplanar forces
3. Couple
4. Moment

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296. When two plates butt together and are riveted with two cover plates with two rows of rivets, the joint is known as

1. Lap joint
2. Butt joint
3. Single riveted single cover butt joint
4. Double riveted double cover butt joint

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297. Which is the correct statement about law of polygon of forces?

1. If any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium
2. If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium
3. If a polygon representing forces acting at a point is closed then forces are in equilibrium
4. If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

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298. Which of the following do not have identical dimensions?

1. Momentum and impulse
2. Torque and energy
3. Torque and work
4. Moment of a force and angular momentum

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299. Which of the following is a vector quantity?

1. Energy
2. Mass
3. Momentum
4. Angle

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300. Which of the following is not a scalar quantity?

1. Time
2. Mass
3. Volume
4. Acceleration

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