# Practice Test: Question Set - 27

**1. The bending moment at a section tends to bend or deflect the beam and the internal stresses resist its bending. The resistance offered by the internal stresses, to the bending, is called**

- (A) Compressive
stress

- (B) Shear
stress

- (C) Bending
stress

- (D) Elastic
modulus

**2. A thin cylindrical shell of diameter (**

*d*), length (*l*) and thickness (*t*) is subjected to an internal pressure (*p*). The hoop stress in the shell is- (A)

*pd*/

*t*

- (B)

*pd*/2

*t*

- (C)

*pd*/4

*t*

- (D)

*pd*/6

*t*

**3. Fatigue test is carried out for**

- (A) Stresses
varying between two limits of equal value, but of opposite sign

- (B) Stresses
varying between two limits of unequal value, but of opposite sign

- (C) Stresses
varying between two limits of unequal value but of same sign

- (D) All
of the above

**4. The neutral axis of a beam is subjected to __________ stress.**

- (A) Zero

- (B) Maximum
tensile

- (C) Minimum
tensile

- (D) Maximum
compressive

**5. Two beams, one of circular cross-section and the other of square cross-section, have equal areas of cross-sections. When these beams are subjected to bending,**

- (A) Both
beams are equally economical

- (B) Square
beam is more economical

- (C) Circular
beam is more economical

- (D) None
of these

**6. A body is subjected to two normal stresses 20 kN/m² (tensile) and 10 kN/m² (compressive) acting perpendicular to each other. The maximum shear stress is**

- (A) 5 kN/m²

- (B) 10 kN/m²

- (C) 15 kN/m²

- (D) 20 kN/m²

**7. The thermal or temperature stress is a function of**

- (A) Increase
in temperature

- (B) Modulus
of elasticity

- (C) Coefficient
of linear expansion

- (D) All
of these

**8. For long columns, the value of buckling load is __________ crushing load.**

- (A) Equal to

- (B) Less than

- (C) More than

- (D) None of
these

**9. When a body is subjected to a direct tensile stress (Ïƒ) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle ‘Î¸’ to the normal of the section is**

- (A)

*Ïƒ sin 2Î¸*

- (B)

*Ïƒ cos 2Î¸*

- (C)

*Ïƒ/2 sin 2Î¸*

- (D)

*Ïƒ/2 cos 2Î¸*

**10. Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation, is called**

- (A) Strain

- (B) Stress

- (C) Pressure

- (D) Modulus
of elasticity

**11. According to Euler's column theory, the crippling load for a column of length (**

*l*) with one end fixed and the other end hinged, is- (A)

*Ï€²EI/l²*

- (B)

*Ï€²EI/4l²*

- (C)

*2Ï€²EI/l²*

- (D)

*4Ï€²EI/l²*

**12. When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a**

- (A) Point load
at the two points

- (B) No loading
between the two points

- (C) Uniformly
distributed load between the two points

- (D) Uniformly
varying load between the two points

**13. According to Euler's column theory, the crippling load for a column of length (**

*l*) fixed at both ends is __________ the crippling load for a similar column hinged at both ends.- (A) Equal to

- (B) Two times

- (C) Four times

- (D) Eight times

**14. A load which is spread over a beam in such a manner that it varies uniformly over the whole length of abeam is called uniformly ________ load.**

- (A) Distributed

- (B) Varying

- (C) Both A and B

- (D) None of
these

**15. Which of the following statement is correct?**

- (A) A
continuous beam has only two supports at the ends.

- (B) A uniformly
distributed load spreads uniformly over the whole length of a beam.

- (C) The bending
moment is maximum where shear force is maximum.

- (D) The maximum
bending moment of a simply supported beam of length

*l*with a central point load

*W*is

*Wl*/8.

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