The density of the metal cannot be calculated from the given data.The metal has twice the density of water.The metal will float on water.The metal is twice as dense as the unknown liquid.None of the above statements are true.

4.What is the set of all points such that the distance from a fixed point is a constant multiple greater than one of the distance from a fixed line?

An ellipseA hyperbolaA parabolaA circleNone of these

5.The coefficient of friction is influenced by which factor?

The type of surfaces in contactThe contact area sizeThe form or contour of the surfacesAll the factors mentioned aboveBoth the type of surfaces and contact area

6.When three forces acting on a rigid body in the same plane maintain equilibrium, what must be true about these forces?

They intersect at a single pointAll three forces are parallel to each otherAt least two of the forces intersectAll the statements above are validNone of the statements above apply

7.What is the algebraic sum of the moments of forces that create a couple about any point lying in their plane?

equal to the moment of the couplea fixed valueboth options A and B are trueneither option A nor B is truenot listed among the above

8.How does kinetic friction generally compare to static friction?

equal in magnitudegreater than static frictionlower than static frictioncan be either higher or lower depending on surface characteristics and speedunrelated to static friction

9.When rain is coming from behind a pedestrian who is walking forward, how should they position their umbrella?

Tilt it more while walkingTilt it less while walkingTilt it more while stationaryTilt it less while stationaryNone of these choices

10.In a belt drive system, if the diameter of the pulley is increased to twice its original size while keeping the belt tension and pulley width unchanged, what modification should be made to the key?

Extend the length of the keyIncrease the depth of the keyEnlarge the width of the keyDouble all the key dimensionsNo changes needed

11.How does the shear stress distribution vary across the cross-section of a shaft subjected to an applied torque?

It decreases from its highest value at the center to zero at the outer edge.It increases from zero at the center to its peak at the outer surface.It starts at a maximum at the center and reduces to a minimum at the outer edge.It begins at a minimum at the center and rises to a maximum at the outer boundary.None of the above statements are correct.

12.For a compound shaft, the safe twisting moment corresponds to which of the following?

The highest computed torqueThe lowest computed torqueThe average torque valueThe most extreme torque valueNone of these options

13.What is the term for a cylindrical part that does not contain any joints?

section without jointsuniform sectionideal sectionfabricated sectionseamless section

14.What is the name of the stress induced in the walls of a cylinder due to forces acting tangentially along its circumference, perpendicular to its length?

axial stresscircumferential stressyield stressmaximum stressnone of these

15.In diamond riveting, which part is considered the most vulnerable or weakest section?

the initial rowthe second rowthe middle rowa rivet hole located in the end rownone of these

16.In which type of joint is a diamond riveted connection typically used?

Butt jointLap jointDouble riveted lap jointAny type of jointNone of these

17.What is the name of a riveted joint where the number of rivets reduces progressively from the center row to the outer rows?

chain-type riveted jointdiamond-pattern riveted jointcrosswise riveted jointzigzag riveted jointnone of these

18.What is the name of the joint formed when two plates are placed edge to edge and fastened with cover plates using two rows of rivets?

lap jointbutt jointsingle-riveted butt joint with one cover platedouble-riveted butt joint with two cover platessingle-riveted butt joint with two cover plates

19.What term describes the distance between the centers of rivets in neighboring rows of a zig-zag riveted joint?

pitchback pitchdiagonal pitchdiametral pitchlap

20.For a composite prismatic member made from two materials bonded together such that they experience the same axial strain, how are the stresses in each material related?

They are identical in magnitudeThey vary in proportion to each material's modulus of elasticityThey vary inversely with the modulus of elasticity of each materialThey equal the average of the combined moduli of elasticityNone of the above

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How to prepare with Strength of Materials MCQs

Work through questions topic by topic, then revisit any you answered incorrectly.
Read explanations carefully—they often cover facts that repeat across PPSC, FPSC, and NTS papers.
Pair subject practice with past papers to see how Strength of Materials appears in real exam conditions.

Strength of Materials

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Practice questions

1.How does the moment of inertia of a hollow circular section about an axis through its center and perpendicular to the section compare to its moment of inertia about the horizontal axis?

2.For which of the following shapes is the center of gravity not located at the geometric center?

3.A metal sample weighs 219 grams in air, 180 grams when submerged in water, and 120 grams when placed in an unknown liquid. Which of the following statements about the metal's density is accurate?