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Department of Civil Engineering

Internal Assessment Test-II

Subject: Elements of Civil Engg Subject Code: 10CIV13

Section: 1stSem Max. Marks: 45

Date: 24/11/2012

PartA (COMPULSORY) (Each Question carries 1 mark) (05 Marks)

Choose the correct answer:

1. Two forces equal in magnitude act at a point. The angle between the lines of action of these two

forces is 60. If the resultant of these two force is 50N, the magnitude of the force is

A) 25.88N (B) 50N (C) 28.87N (D) 25N

2. The process of finding the resultant of a system of forces is called(A) Resultant (B) Resolution (C) Composition (D) None of these

3. The force which cancels the effect of the force system is known as

(A) Resultant (B) Neutral force (C) Balancing force (D) Equilibriant

4. Reaction force at the contact surface is

(A) Internal force (B) Applied force(C) Either A or B(D) Neither A nor B

5. The necessary condition of equilibrium of co-planar concurrent force system is :

A) Fy = Fx B) Fx = 0, Fy = 0 C) M = 0 D) Fx Fy = 1

Part- B

Answer ANY TWO full questions1. a) State and Derive Varignons principle ( 8 marks)b) Find the magnitude , direction and x intercept of the resultant of the (12 marks)

system of forces shown in figure 1.(b). S is the midpoint of RT.

2. a) State and derive Lamis Theorem ( 8 marks)b) A horizontal channel with an inner clearance of 1000mm carriestwo spheres of radius 350mm and 250mm whose weights are 500N

and 400N respectively. Find the reactions at all points of contacts. Figure 2.(b)

3. a) A flat plate is subjected to the coplanar system of forces as shown. Each ( 10 marks)square of the inscribed grid is having a length of 1m. determine the resultant. Figure 3.(a) .

b) Figure 3. (b)shows a system of cables in equilibrium under two vertical loads (10 marks)

of 300N and 500N. Determine the forces developed in different segments.

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