MCQOPTIONS
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MCQOPTIONS
This section includes 4791 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 3051. |
The neutral axis of a beam is subjected to __________ stress. |
| A. | zero |
| B. | maximum tensile |
| C. | minimum tensile |
| D. | maximum compressive |
| Answer» B. maximum tensile | |
| 3052. |
A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The maximum normal stress will be |
| A. | -100 MPa |
| B. | 250 MPa |
| C. | 300 MPa |
| D. | 400 MPa |
| Answer» E. | |
| 3053. |
The moment of resistance of a balanced reinforced concrete beam is based on the stresses in |
| A. | steel only |
| B. | concrete only |
| C. | steel and concrete both |
| D. | none of these |
| Answer» D. none of these | |
| 3054. |
According to Euler's column theory, the crippling load of a column is given by p = 2 EI/Cl2. In the Euler's formula, the value of C for a column with one end fixed and the other end hinged, is 1/2. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3055. |
When a shaft, is subjected to torsion, the shear stress induced in the shaft varies from |
| A. | minimum at the centre to maximum at the circumference |
| B. | maximum at the centre to minimum at the circumference |
| C. | zero at the centre to maximum at the circumference |
| D. | maximum at the centre to zero at the circumference |
| Answer» D. maximum at the centre to zero at the circumference | |
| 3056. |
The maximum bending moment for a simply supported beam with a gradually varying load from zero at both ends and w per metre at the centre, lies at the centre of a beam. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3057. |
A pressure vessel is said to be a thin shell when the ratio of wall thickness of the vessel to its diameter is __________ 1/10. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» C. greater than | |
| 3058. |
For a shaft, the shear stress at a point is __________ the distance from the axis of the shaft. |
| A. | equal to |
| B. | directly proportional to |
| C. | inversely proportional to |
| Answer» C. inversely proportional to | |
| 3059. |
A spring used to absorb shocks and vibrations is |
| A. | conical spring |
| B. | torsion spring |
| C. | leaf spring |
| D. | disc spring |
| Answer» D. disc spring | |
| 3060. |
A pressure vessel is said to be a thin shell when it is made of thin sheets. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 3061. |
When a column is subjected to an eccentric load, the stress induced in the column will be |
| A. | direct stress only |
| B. | bending stress only |
| C. | shear stress only |
| D. | direct and bending stress both |
| Answer» E. | |
| 3062. |
A beam supported on more than two supports is called |
| A. | simply supported beam |
| B. | fixed beam |
| C. | overhanging beam |
| D. | continuous beam |
| Answer» E. | |
| 3063. |
In a leaf spring, the length of all the leaves are equal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3064. |
Two beams, one of circular cross-section and the other of square cross-section, have equal areas of cross-sections. When these beams are subjected to bending, |
| A. | both beams are equally economical |
| B. | square beam is more economical |
| C. | circular beam is more economical |
| D. | none of these |
| Answer» C. circular beam is more economical | |
| 3065. |
A beam extending beyond the supports is called |
| A. | simply supported beam |
| B. | fixed beam |
| C. | overhanging beam |
| D. | cantilever beam |
| Answer» D. cantilever beam | |
| 3066. |
The compression test is carried on __________ materials. |
| A. | ductile |
| B. | brittle |
| C. | malleable |
| D. | plastic |
| Answer» C. malleable | |
| 3067. |
A tensile test is performed on a mild steel round bar. Its diameter after fracture will |
| A. | remain same |
| B. | increase |
| C. | decrease |
| D. | depend upon rate of loading |
| Answer» D. depend upon rate of loading | |
| 3068. |
When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness of the spring is given by |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/113-316-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/113-316-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/113-316-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/113-316-4.png"> |
| Answer» E. | |
| 3069. |
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the diameter of wire of spring 'A' is double that of spring 'B' The stiffness of spring 'B' will be __________ that of spring 'A' |
| A. | one-sixteenth |
| B. | one-eighth |
| C. | one-fourth |
| D. | one-half |
| Answer» B. one-eighth | |
| 3070. |
In a beam of uniform strength, the bending stress developed is constant and is equal to the allowable stress at every section of the beam. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3071. |
Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D/2. The strength of shaft 'B' is __________ as that of shaft 'A' |
| A. | one-eighth |
| B. | one-fourth |
| C. | one-half |
| D. | four times |
| Answer» B. one-fourth | |
| 3072. |
The perpendicular distance between the centre lines of the successive rows, is called pitch. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 3073. |
The planes, which carry no shear stress, are known as principal planes. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3074. |
The columns whose slenderness ratio is less than 80, are known as |
| A. | short columns |
| B. | long columns |
| C. | weak columns |
| D. | medium columns |
| Answer» B. long columns | |
| 3075. |
Within elastic limit, shear stress is __________ shear strain. |
| A. | equal to |
| B. | less than |
| C. | directly proportional to |
| D. | inversely proportional to |
| Answer» D. inversely proportional to | |
| 3076. |
Modular ratio of the two materials is the ratio of |
| A. | linear stress to linear strain |
| B. | shear stress to shear strain |
| C. | their modulus of elasticities |
| D. | their modulus of rigidities |
| Answer» D. their modulus of rigidities | |
| 3077. |
In a tensile test, when the material is stressed beyond elastic limit, the tensile strain __________ as compared to the stress. |
| A. | decreases slowly |
| B. | increases slowly |
| C. | decreases more quickly |
| D. | increases more quickly |
| Answer» E. | |
| 3078. |
A section of beam is said to be in pure bending, if it is subjected to |
| A. | constant bending moment and constant shear force |
| B. | constant shear force and zero bending moment |
| C. | constant bending moment and zero shear force |
| D. | none of the above |
| Answer» D. none of the above | |
| 3079. |
In a leaf spring, the deflection at the centre is |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/112-313-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/112-313-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/112-313-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/112-313-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/strength-of-materials/112-313-4.png"> | |
| 3080. |
The actual neutral axis of a reinforced cement concrete beam is based on the principle that the moment of areas of compression and tension zones at the neutral axis are equal. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3081. |
A cantilever beam is one which is |
| A. | fixed at both ends |
| B. | fixed at one end and free at the other end |
| C. | supported at its ends |
| D. | supported on more than two supports |
| Answer» C. supported at its ends | |
| 3082. |
The neutral axis of a transverse section of a beam passes through the centre of gravity of the section and is |
| A. | in the vertical plane |
| B. | in the horizontal plane |
| C. | in the same plane in which the beam bends |
| D. | at right angle to the plane in which the beam bends |
| Answer» E. | |
| 3083. |
A pressure vessel is said to be a thick shell, when |
| A. | it is made of thick sheets |
| B. | the internal pressure is very high |
| C. | the ratio of wall thickness of the vessel to its diameter is less than 1/10. |
| D. | the ratio of wall thickness of the vessel to its diameter is greater than 1/10. |
| Answer» E. | |
| 3084. |
The product of Young's modulus (E) and moment of inertia (I) is known as |
| A. | modulus of rigidity |
| B. | bulk modulus |
| C. | flexural rigidity |
| D. | torsional rigidity |
| Answer» D. torsional rigidity | |
| 3085. |
The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is |
| A. | 2/3 |
| B. | 3/4 |
| C. | 1 |
| D. | 9/8 |
| Answer» E. | |
| 3086. |
Transverse fillet welds are designed for |
| A. | tensile strength |
| B. | compressive strength |
| C. | shear strength |
| D. | bending strength |
| Answer» B. compressive strength | |
| 3087. |
A beam of triangular section is placed with its base horizontal. The maximum shear stress occurs at |
| A. | apex of the triangle |
| B. | mid of the height |
| C. | centre of gravity of the triangle |
| D. | base of the triangle |
| Answer» C. centre of gravity of the triangle | |
| 3088. |
The maximum shear stress in a thin spherical shell subjected to an internal pressure (p) is zero. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 3089. |
The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, l = Original length of the body, A = Cross-sectional area of the body, and E = Young's modulus for the material of the body) |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/84-15-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/84-15-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/84-15-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/84-15-4.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/strength-of-materials/84-15-3.png"> | |
| 3090. |
A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission's ratio of the bar in tension will be __________ the Poisson's ratio for the bar in compression. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» B. less than | |
| 3091. |
A square beam and a circular beam have the same length, same allowable stress and the same bending moment. The ratio of weights of the square beam to the circular beam is |
| A. | 1/2 |
| B. | 1 |
| C. | 1/1.12 |
| D. | 1/ |
| E. | <span class="root">2</span> |
| Answer» D. 1/ | |
| 3092. |
When a body is subjected to a direct tensile stress ( ) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle to the normal of the section is |
| A. | sin 2 |
| B. | cos 2 |
| C. | /2 sin 2 |
| D. | /2 cos 2 |
| Answer» D. /2 cos 2 | |
| 3093. |
The distance between the centre of a rivet hole to the nearest edge of plate, is called |
| A. | margin |
| B. | pitch |
| C. | back pitch |
| D. | diagonal pitch |
| Answer» B. pitch | |
| 3094. |
For biaxial stress, the planes of maximum shear are at right angles to each other and are inclined at 45 to the principal planes. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3095. |
The maximum deflection of a fixed beam of length l carrying a total load W uniformly distributed over the whole length is |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/106-259-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/106-259-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/106-259-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/106-259-4.png"> |
| Answer» E. | |
| 3096. |
When a beam is subjected to bending moment, the stress at any point is __________ the distance of the point from the neutral axis. |
| A. | equal to |
| B. | directly proportional to |
| C. | inversely proportional to |
| D. | independent of |
| Answer» C. inversely proportional to | |
| 3097. |
A thick cylindrical shell having ro and ri as outer and inner radii, is subjected to an internal pressure (p). The minimum tangential stress at the outer surface of the shell is |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/120-392-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/120-392-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/120-392-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/120-392-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/strength-of-materials/120-392-4.png"> | |
| 3098. |
In a simple bending theory, one of the assumption is that the plane sections before bending remain plane after bending. This assumption means that |
| A. | stress is uniform throughout the beam |
| B. | strain is uniform throughout the beam |
| C. | stress is proportional to the distance from the neutral axis |
| D. | strain is proportional to the distance from the neutral axis |
| Answer» E. | |
| 3099. |
The maximum shear stress is equal to the radius of Mohr's circle. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3100. |
In the below figure, Hook's law holds good, for the portion from O to A. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |