Lacing shall be designed to resist a total transverse shear equal to ____ of axial force in member

Consider the following statements for the design of a laced column: 1) In a bolted construction, the minimum width of the lacing bar shall be three times the nominal diameter of the end bolt. 2) The thickness of the flat of a single lacing system shall be not less than one-fortieth of its effective length 3) The angle of inclination of the lacing bar should be less than 40° with the axis of the built-up column 4) The lacing shall be designed for a transverse shear of 2.5% of the axial load on the column Which of the above statements are correct?

A

1, 2 and 3 only

B

1, 2 and 4 only

C

1, 3 and 4 only

D

1, 2, 3 and 4

Consider the following statements: In case of helical gears, teeth are cut at an angle to the axis of rotation of the gears. 1) Helix angle introduces another ratio called axial contact ratio. 2) Transverse contact ratio is equal to axial contact ratio in helical gears. 3) Large transverse contact ratio does not allow multiple teeth to share the load. 4) Large axial contact ratio will cause larger axial force component Which of the above statements are correct?

A

1 and 2

B

2 and 3

C

1 and 4

D

3 and 4

The average age of a family having three members is 40 years. The smallest member of the family is 18 years old. The difference between the age of the oldest family member and the age of the second oldest family member is 6 more than the difference between the age of the second oldest member and age of youngest member of the family. Quantity I: 25 years hence, what will be the average of the age of smallest member and that of oldest member of the family? Quantity II: What is the age of the oldest member of the family?

A

Quantity I ≤ Quantity II

B

Quantity I ≥ Quantity II

C

Quantity I > Quantity II

D

Quantity I = Quantity II

E

Relationship cannot be determined

A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is $$\tau $$. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

A

$$\frac{\tau }{2}$$

B

$$\tau $$

C

$$2\tau $$

D

$$4\tau $$

Battens should be designed to resist transverse shear force which is

A

5% of axial force

B

0.5% of axial force

C

2.5% of axial force

D

7.2% of axial force

Compressive strength in lacing bars in single lacing system is equal to

A

Vt /(N secΘ)

B

Vt /(N cosecΘ)

C

Vt N cosecΘ

D

(Vt /N) cosecΘ

If nominal shear stress $${\tau _{\text{v}}}$$ exceeds the design shear strength of concrete $${\tau _{\text{c}}}$$, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to

A

$${\tau _{\text{v}}}$$

B

$${\tau _{\text{c}}}$$

C

$${\tau _{\text{v}}} - {\tau _{\text{c}}}$$

D

$${\tau _{\text{v}}} + {\tau _{\text{c}}}$$

Lacing bars in a steel column should be designed to resist

A

Bending moment due to 2.5% of the column load

B

Shear force due to 2.5% of the column load

C

2.5% of the column load

D

Both (A) and (B)

The transverse shear stress acting in a beam of rectangular cross-section, subjected to a transverse shear load, is ____________

A

variable with maximum at the bottom of the beam

B

Variable with maximum at the top of the beam

C

Uniform

D

Variable with maximum on the neutral axis

The radius of gyration of combined column about axis perpendicular to plane of lacing should be _____ than about axis parallel to plane of lacing.

A

cannot be compared

B

smaller

C

greater

D

equal to

Lacing shall be designed to resist a total transverse shear equal to ____ of axial force in member

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