28.

29.

30.

31.

32.

33.

Three forces A, B and C of magnitude 4N, 6N and 10N acting on a particle are in equilibrium.
It can be concluded that :

(^) Aand B are perpendicular to each other
(B) Bis noncoplanar

(C) Cis non concurrent

(D) Band C are acting in opposite direction

Which of the following elements has simple cubic structure?
(A) Magnesium ൯) Polonium
(C) Titanium (D) Aluminium

Which one of the following will decrease when the percentage of carbon increases?
(A) Hardness ൯) Ductility
(C) Ultimate strength (D) Percentage of cementite

The elongation of shaft A is four times the elongation of shaft B when subjected to equal
tensile force. If the modulus of elasticity length of both shafts are the same then :

(A) Diameter of A is half the diameter of B

(B) Diameter of A is twice the diameter of B

(C) Diameter of A is one-fourth the diameter of B
(D) Diameter of A is four time the diameter of B

The bulk modulus of metal A is twice of metal B and modulus of rigidity of A is three times of
metal B, which one of the following is correct?

(A) The modulus of Elasticity of A is three times of B
(B) The modulus of Elasticity of A is four times of B
(C) The modulus of Elasticity of A is six times of B
(D) The modulus of Elasticity of A is eight times of B

Which of the following statements is/are correct regarding the pressure angle of a cycloid
gear tooth profile?

@ Pressure angle is constant throughout the profile
(ii) Pressure angle is zero at the pitch point
(iii) Pressure angle is maximum at the beginning and end of contact
(iv) Pressure angle varies from point to point
(A) @ only
൯ ii) and (iii) only
(C) (ii) and (iv) only
(D) (ii), (iii) and (iv) only

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