Questions and answers for exam Preparation

MCQs

Total Questions : 735 | Page 73 of 74 pages

Question 721. 4. The value of the maximum B.M. of the loaded beam of the Q. No. 3 will be

6000 Nm
5000 Nm
6562.5 Nm
6312.5 Nm.

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Answer: Option A. -> 6000 Nm

Question 722. 7. A shaft rotating at (500)r.p.m. produces 80 H.P. (metric). If the maximum/ permissible shearing stress is 850 kg/cm, the required diameter of the shaft is

4.5 cm
5.0 cm
6.0 cm
6.5 cm

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Answer: Option D. -> 6.5 cm

Question 723. 5. The range within which an eccentric load may be applied on a vertical column to avoid any tensile stress is within the middle

half of the section
third of the section
quarter of the section
sixth of the section.

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Answer: Option D. -> sixth of the section.

Question 724. 8. Pick up the correct statement regarding a single concentrated load rolling over a simplysupported girder from the following:

The shear force attains the maximum positive magnitude at the sectionXwhen the load reaches the sectionX.
The maximum B.M. atthe cross-section occurswhentheload isonthe section itself.
The absolutely maximum bending moment anywhereWL inthe girder, occurs atthe centre, equal to 4
All the above.

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Answer: Option D. -> All the above.

Question 725. 6. Pick up the correct statement from the following :

The shear stress is maximum at the axis of the shaft subjected to a torque
The ratio of the polar moment of inertia and the radius of the shaft, is called the polar modulus of the shaft section.
Torsinal rigidity of the shaft is the torque that produces a twist of one radian in the length of the shaft
The angle of twist in a shaft subjected to a torque is inversely proportional to the twisting moment.

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Answer: Option C. -> Torsinal rigidity of the shaft is the torque that produces a twist of one radian in the length of the shaft

Question 726. 9. Pick up the correct statement fromthe following :

The resultant of three concurrent forces, P,Q and.? can be obtained by the parallelogram method
The resultant of three or more concurrnet forces can be obtained by any convenient order of tip-tail vector addition.
Mass is that invariant property of a body which measures its resistance to a change of motion.
All the above.

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Answer: Option D. -> All the above.

Question 727. 1. The resultant of the loads acting on the Fink truss acts right of A at a distance of2W 10.5W

4 m
5 m
6 m
7.5 m

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Answer: Option C. -> 6 m

Question 728. 0. Which one of the following is the axiom of mechanics?

The resultant of two forces is the diagonal formed onthe vectors of these forces.
The foreces are in equilibrium only when they are equal in magnitude, opposite in direction, and collnear in action.
A set of forcesin equilibrium may be added to any system of forces without changing the effectofthe original system.
All the above.

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Answer: Option C. -> A set of forcesin equilibrium may be added to any system of forces without changing the effectofthe original system.

Question 729. 3. Pick up the correct statement from the following :

The earth pull is treated as a downward vertical force equal to the weight W of the free body and acting through the centre of gravity.
The action of a smooth surface is treated as a force N acting perpendicular to the smooth surface.
The supporting force F acting at a smooth pin or hinge acts in any direction perpendicular to the pin axis.
All the above.

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Answer: Option D. -> All the above.

Question 730. 2. Pick up the correct statement from the following :

If the resultant of a force-system acting on a body is zero, the body is said to be in equilibrium.
Balanced force system compose the subject matter of statics.
Unbalanced force systems cause bodies to accelerate.
All the above.

Discuss Question

Answer: Option D. -> All the above.