How many possible set of forces does a statically determinate truss has?

Muller-Breslau Principle for obtaining influence lines is applicable to 1. Statically determinate beams and frame 2. Statically indeterminate structures, the material of which is elastic and follows Hooke’s law 3.Any statically indeterminate structure

A

1 and 2 only

B

1 only

C

2 only

D

1 and 3 only

E

All of these

Muller Breslau’s principle for obtaining influence lines is applicable toi) trussesii) statically determinate beams and framesiii) statically indeterminate structures, the material of which is elastic and follows Hooke’s lawiv) any statically indeterminate structureThe correct answer is

A

(i), (ii) and (iii)

B

(i), (ii) and (iv)

C

(i) and (ii)

D

only (i)

A planar truss tower structure is shown in the figure. Consider the following statements about the external and internal determinacies of the truss. P. Externally determinate Q. External static indeterminacy = 1 R. External Static Indeterminacy = 2 S. Internally Determinate T. Internal Static Indeterminacy = 1 U. Internal Static Indeterminacy = 2 Which one of the following options is correct?

A

P-False; Q-True; R-False; S-False; T-False; U-True

B

P-False; Q-True; R-False; S-False; T-True; U-False

C

P-False; Q-False; R-True; S-False; T-False; U-True

D

P-True; Q-True; R-False; S-True; T-False; U-True

Considering a plane truss having M-number of members, N-number of joints, and R-number of reactions at its supports. Which of the following equation indicates that the truss is statically determinate in nature?

A

M + R > 3N

B

M + R > 2N

C

M + R = 2N

D

M + R = 3N

The member forces in a statically in determinate truss

A

Can be obtained by graphic statics

B

Cannot be obtained by graphic statics

C

May be obtained by graphic statics

D

Can be obtained by graphic statics by trial and error

Which of the following does not apply to statically determinate structures?

A

Stresses are caused due to temperature variations

B

No stresses are caused due to lack of fit

C

Bending moment at a section is independent of cross sectional area of the components

D

Force in a component is independent of the material

E

Conditions of the equilibrium are sufficient to fully analyze the structure

In a group of 50 students who either want to join defence forces or paramilitary forces, out of which 40 students want to join defence forces and 30 want to join paramilitary forces. Find the number of students who want to join only defence forces.

A

15

B

20

C

12

D

10

E

None of these

Which of the following types of inter molecular interactions or forces is/are called van der Waals forces? 1. London forces 2. Dipole - dipole forces 3. Dipole - induced dipole forces 4. Hydrogen bonding Choose the correct code:

A

Only 2, 3 and 4

B

Only 1, 2 and 3

C

Only 3 and 4

D

Only 1 and 2

The system of forces acting on the aircraft are propulsive forces, aerodynamic forces, gravitational forces and these result in inertial forces.

A

True

B

False

A rigid-jointed plane frame is stable and statically determinate if (where m is number of members, r is reaction components and j is number of joints)

A

(m + r) = 2j

B

(m + r) = 3j

C

(3m + r) = 3j

D

(m + 3r) = 3j

How many possible set of forces does a statically determinate truss has?

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