Civil Engineering Archives

2771. The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span; flexural rigidity being EI, is______________?

A. WL3/3EL

B. WL3/8EL

C. WL3/24EL

D. WL3/48EL

✅ The correct answer is option D.

2772. Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than_____________________?

A. 2 m

B. 3 m

C. 4 m

D. 5 m

✅ The correct answer is option B.

2773. Pick up the correct statement from the following_______________?

A. The structural member subjected to compression and whose dimensions are small as

B. compared to its length, is called a stmt

The vertical compression members are generally known as columns or stanchions

C. Deflection in lateral direction of a long column, is generally known as buckling

✅ The correct answer is option D.

2774. In compressed air tunneling, the volume of free air provided is______________?

A. 6 mJ per second per m2 of face area

B. 6 m3 per minute per m2 of face area

C. 20 m3 per minute per m2 of face area

D. 6 m3 per hour per m2 of face area

✅ The correct answer is option B.

2775. Flat spiral springs_______________?

A. Consist of uniform thin strips

B. Are supported at outer end

C. Are wound by applying a torque

D. All the above

✅ The correct answer is option D.

2776. If E, N, K and 1/m are modulus of elasticity, modulus of rigidity. Bulk modulus and Poisson ratio of the material, the following relationship holds good_______________?

A. E = 3K (1 – 2/m)

B. E = 2N (1 + 1/m)

C. (3/2)K (1 – 2/m) = N (1 + 1/m)

D. All the above

✅ The correct answer is option D.

2777. Which of the following is not a component of the shield ?

A. propelling jacks

B. liner plate

C. hood

D. tail

✅ The correct answer is option B.

2778. Total strain energy theory for the failure of a material at elastic limit, is known_________________?

A. Guest’s or Trecas’ theory

B. St. Venant’s theory

C. Rankine’s theory

D. Haig’s theory

✅ The correct answer is option D.

2779. A body is said to be in equilibrium if___________________?

A. It moves horizontally

B. It moves vertically

C. It rotates about its C.G.

D. None of these

✅ The correct answer is option D.

2780. If ‘D’ is the diameter of tunnel in meters, then the thickness of lining in mm, as per the empirical formula is given by_________________?

A. 42 D

B. 82 D

C. 104 D

D. 124 D

✅ The correct answer is option B.