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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.
| 2951. |
A molecule consisting of one atom is known as |
| A. | monoatomic |
| B. | diatomic |
| C. | triatomic |
| D. | polyatomic |
| Answer» B. diatomic | |
| 2952. |
The above figure shows the three coplaner forces P, Q and R acting at a point O. If these forces are in equilibrium, then |
| A. | <img src="/_files/images/mechanical-engineering/engineering-mechanics/26-37-2.png"> |
| B. | <img src="/_files/images/mechanical-engineering/engineering-mechanics/26-37-3.png"> |
| C. | <img src="/_files/images/mechanical-engineering/engineering-mechanics/26-37-4.png"> |
| D. | <img src="/_files/images/mechanical-engineering/engineering-mechanics/26-37-5.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/engineering-mechanics/26-37-4.png"> | |
| 2953. |
The efficiency of a screw jack is maximum, when(where = Helix angle, and = Angle of friction.) |
| A. | = 45 + /2 |
| B. | = 45 - /2 |
| C. | = 90 + |
| D. | = 90 - |
| Answer» C. = 90 + | |
| 2954. |
When a train is rounding a curve, the side thrust on the wheel flanges is prevented by raising the outer edge of the rail. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 2955. |
The velocity ratio for the second system of pulleys is n. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2956. |
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as |
| A. | coplaner concurrent forces |
| B. | coplaner non-concurrent forces |
| C. | non-coplaner concurrent forces |
| D. | none of these |
| Answer» E. | |
| 2957. |
A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act |
| A. | towards the wall at its upper and |
| B. | away from the wall at its upper end |
| C. | downward at its upper end |
| D. | upward at its upper end |
| Answer» E. | |
| 2958. |
Two blocks A and B of masses 150 kg and 50 kg respectively are connected by means of a string as shown in the below figure. The tension in all the three strings __________ be same. |
| A. | will |
| B. | will not |
| Answer» B. will not | |
| 2959. |
A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2960. |
The forces which meet at one point, but their lines of action __________ on the same plane, are Known as non-coplaner concurrent forces. |
| A. | lie |
| B. | do not lie |
| Answer» C. | |
| 2961. |
A notch is used to measure __________ of liquids. |
| A. | pressure |
| B. | discharge |
| C. | velocity |
| D. | volume |
| Answer» C. velocity | |
| 2962. |
The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is |
| A. | 20N |
| B. | 100N |
| C. | 500N |
| D. | none of these |
| Answer» D. none of these | |
| 2963. |
Two equal and opposite parallel forces whose lines of action are different, can be replaced by a single force parallel to the given forces. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 2964. |
A flow is called sonic, if the Mach number is unity. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 2965. |
The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where IG = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface) |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/152-62-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/152-62-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/152-62-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/152-62-4.png"> |
| Answer» E. | |
| 2966. |
The magnitude of water hammer depends upon the |
| A. | elastic properties of the pipe material |
| B. | elastic properties of the liquid flowing through the pipe |
| C. | speed at which the valve is closed |
| D. | all of the above |
| Answer» E. | |
| 2967. |
The most efficient section of a channel is |
| A. | triangular |
| B. | rectangular |
| C. | square |
| D. | trapezoidal |
| Answer» E. | |
| 2968. |
The velocity at which the turbulent flow starts is known as higher critical velocity. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 2969. |
The neutral axis of the cross-section a beam is that axis at which the bending stress is |
| A. | zero |
| B. | minimum |
| C. | maximum |
| D. | infinity |
| Answer» B. minimum | |
| 2970. |
The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation. |
| A. | same as |
| B. | less than |
| C. | more than |
| Answer» B. less than | |
| 2971. |
Newton's law of viscosity is a relationship between |
| A. | pressure, velocity and temperature |
| B. | shear stress and rate of shear strain |
| C. | shear stress and velocity |
| D. | rate of shear strain and temperature |
| Answer» C. shear stress and velocity | |
| 2972. |
The shear force at apoint on a beam is the algebraic __________ of all the forces on either side of the point. |
| A. | sum |
| B. | difference |
| Answer» B. difference | |
| 2973. |
The polar modulus for a solid shaft of diameter (D) is |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/109-283-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/109-277-1.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/109-277-2.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/109-277-4.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/strength-of-materials/109-277-2.png"> | |
| 2974. |
When the shear force diagram is a parabolic curve between two points, it indicates that there is a |
| A. | point load at the two points |
| B. | no loading between the two points |
| C. | uniformly distributed load between the two points |
| D. | uniformly varying load between the two points |
| Answer» E. | |
| 2975. |
In a coupling rod of a locomotive, each of the four pairs is a __________ pair. |
| A. | sliding |
| B. | turning |
| C. | rolling |
| D. | screw |
| Answer» C. rolling | |
| 2976. |
The design of thin cylindrical shells is based on |
| A. | hoop stress |
| B. | longitudinal stress |
| C. | arithmetic mean of the hoop and the longitudinal stress |
| D. | geometric mean of the hoop and longitudinal stress |
| Answer» B. longitudinal stress | |
| 2977. |
The volumetric strain is the ratio of the |
| A. | original thickness to the change in thickness |
| B. | change in thickness to the original thickness |
| C. | original volume to the change in volume |
| D. | change in volume to the original volume |
| Answer» E. | |
| 2978. |
The values of equivalent length (L) and actual length (l) of a column for both ends hinged is the same |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 2979. |
The torque transmitted by a hollow shaft of outer diameter (D) and inner diameter (d) is |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/110-285-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/110-285-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/110-285-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/110-285-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/strength-of-materials/110-285-4.png"> | |
| 2980. |
The factor which affects the critical speed of a shaft is |
| A. | diameter of disc |
| B. | span of shaft |
| C. | eccentricity |
| D. | all of these |
| Answer» E. | |
| 2981. |
A shear stress across a plane, is always accompanied by a balancing shear stress across the plane and normal to it. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2982. |
When a body is subjected to a direct tensile stress ( x) in one plane accompanied by a simple shear stress ( xy), the maximum shear stress is |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/90-86-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/90-86-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/90-86-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/90-86-4.png"> |
| Answer» E. | |
| 2983. |
The assumption, generally, made in the theory of simple bending is that |
| A. | the beam material is perfectly homogenous and isotropic |
| B. | the beam material is stressed within its elastic limit |
| C. | the plane sections before bending remain plane after bending |
| D. | all of the above |
| Answer» E. | |
| 2984. |
In a stress-strain diagram for mild steel, as shown in the below figure, the point A represents |
| A. | elastic limit |
| B. | upper yield-point |
| C. | lower yield point |
| D. | breaking point |
| Answer» B. upper yield-point | |
| 2985. |
The maximum bending moment for the beam shown in the below figure, is |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/99-180-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/99-180-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/99-180-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/99-180-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/strength-of-materials/99-180-4.png"> | |
| 2986. |
A load which acts at a point on a beam is not called uniformly distributed load. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 2987. |
The bending moment diagram for a simply supported beam loaded in its centre is |
| A. | a right angled triangle |
| B. | an issoscles triangle |
| C. | an equilateral triangle |
| D. | a rectangle |
| Answer» C. an equilateral triangle | |
| 2988. |
The polar modulus for a hollow shaft of outer diameter (D) and inner diameter (d) is |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/109-284-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/109-284-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/109-284-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/109-284-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/strength-of-materials/109-284-4.png"> | |
| 2989. |
The ratio of linear stress to the linear strain is called |
| A. | modulus of rigidity |
| B. | modulus of elasticity |
| C. | bulk modulus |
| D. | Poisson's ratio |
| Answer» C. bulk modulus | |
| 2990. |
The bending equation is |
| A. | <img src="/_files/images/mechanical-engineering/strength-of-materials/101-202-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/strength-of-materials/101-202-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/strength-of-materials/101-202-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/strength-of-materials/101-202-4.png"> |
| Answer» B. <img src="/_files/images/mechanical-engineering/strength-of-materials/101-202-2.png"> | |
| 2991. |
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 minimum normal stress will be |
| A. | -100 MPa |
| B. | 250 MPa |
| C. | 300 MPa |
| D. | 400 MPa |
| Answer» B. 250 MPa | |
| 2992. |
A riveted joint may fail by |
| A. | tearing of the plate at an edge |
| B. | tearing of the plate across a row of rivets |
| C. | shearing of rivets |
| D. | any one of these |
| Answer» E. | |
| 2993. |
The rectangular beam 'A ' has length l, width b and depth d. Another beam 'B' has the same width and depth but length is double that of 'A'. The elastic strength of beam 'B' will be __________ as compared to beam A. |
| A. | same |
| B. | one-half |
| C. | one-fourth |
| D. | one-eighth |
| Answer» C. one-fourth | |
| 2994. |
A tensile test is performed on a round bar. After fracture, it has been found that the diameter remains approximately same at fracture. The material under test was |
| A. | mild steel |
| B. | cast iron |
| C. | glass |
| D. | copper |
| Answer» C. glass | |
| 2995. |
Modulus of rigidity may be defined as the ratio of |
| A. | linear stress to lateral strain |
| B. | lateral strain to linear strain |
| C. | linear stress to linear strain |
| D. | shear stress to shear strain |
| Answer» E. | |
| 2996. |
A spring, when loaded, is permanently distorted and recover its original shape when the load is removed. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 2997. |
When a rectangular beam is loaded longitudinally, the shear force develops on the top layer. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 2998. |
The capacity of a strained body for doing work on the removal of the straining force, is called |
| A. | strain energy |
| B. | resilience |
| C. | proof resilience |
| D. | impact energy |
| Answer» C. proof resilience | |
| 2999. |
The given figure shows the Mohr's circle of stress for two unequal and like principal stresses ( x and y) acting at a body across two mutually perpendicular planes. The tangential stress is given by |
| A. | <i>OC</i> |
| B. | <i>OP</i> |
| C. | <i>OQ</i> |
| D. | <i>PQ</i> |
| Answer» E. | |
| 3000. |
In a simply supported beam carrying a uniformly distributed load w per unit length, the point of contraflexure |
| A. | lies in the centre of the beam |
| B. | lies at the ends of the beam |
| C. | depends upon the length of beam |
| D. | does not exist |
| Answer» E. | |