McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 51. |
Logarithmic spiral is also called Equiangular spiral. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: the logarithmic spiral is also known as equiangular spiral because of its property that the angle which the tangent at any point on the curve makes with the radius vector at that point is constant. the values of vectorial angles are in arithmetical progression. | |
| 52. |
In logarithmic Spiral, the radius vectors are in arithmetical progression. |
| A. | true |
| B. | false |
| Answer» B. false | |
| Explanation: in the logarithmic spiral, the values of vectorial angles are in arithmetical progression and radius vectors are in the geometrical progression that is the lengths of consecutive radius vectors enclosing equal angles are always constant. | |
| 53. |
The mosquito coil we generally see in house hold purposes and heating coils in electrical heater etc are generally which spiral. |
| A. | logarithmic spiral |
| B. | equiangular spiral |
| C. | fibonacci spiral |
| D. | archemedian spiral |
| Answer» D. archemedian spiral | |
| Explanation: archemedian spiral is a curve traced out by a point moving in such a way that its movement towards or away from the pole is uniform with the increase of the vectorial angle from the starting line. the use of this curve is made in teeth profiles of helical gears, profiles of cam etc. | |
| 54. |
The sections cut by a plane on a right circular cone are called as |
| A. | parabolic sections |
| B. | conic sections |
| C. | elliptical sections |
| D. | hyperbolic sections |
| Answer» B. conic sections | |
| Explanation: the sections cut by a plane on a right circular cone are called as conic sections or conics. the plane cuts the cone on different angles with respect to the axis of the cone to produce different conic sections. | |
| 55. |
Which of the following is a conic section? |
| A. | circle |
| B. | rectangle |
| C. | triangle |
| D. | square |
| Answer» A. circle | |
| Explanation: circle is a conic section. when the plane cuts the right circular cone at right angles with the axis of the cone, the shape obtained is called as a circle. if the angle is oblique we get the other parts of the conic sections. | |
| 56. |
In conics, the is revolving to form two anti-parallel cones joined at the apex. |
| A. | ellipse |
| B. | circle |
| C. | generator |
| D. | parabola |
| Answer» C. generator | |
| Explanation: in conics, the generator is revolving to form two anti-parallel cones joined at the apex. the plane is then made to cut these cones and we get different conic sections. if we cut at right angles with respect to the axis of the cone we get a circle. | |
| 57. |
While cutting, if the plane is at an angle and it cuts all the generators, then the conic formed is called as |
| A. | circle |
| B. | ellipse |
| C. | parabola |
| D. | hyperbola |
| Answer» B. ellipse | |
| Explanation: if the plane cuts all the generators and is at an angle to the axis of the cone, then the resulting conic section is called as an ellipse. if the cutting angle was right angle and the plane cuts all the generators then the conic formed would be circle. | |
| 58. |
When the plane cuts the cone at angle parallel to the axis of the cone, then is formed. |
| A. | hyperbola |
| B. | parabola |
| C. | circle |
| D. | ellipse |
| Answer» A. hyperbola | |
| Explanation: when the plane cuts the cone at an angle parallel to the axis of the cone, then the resulting conic section is called as a hyperbola. if the plane cuts the cone at an angle with respect to the axis of the cone then the resulting conic sections are called as ellipse and parabola. | |
| 59. |
Which of the following is not a conic section? |
| A. | apex |
| B. | hyperbola |
| C. | ellipse |
| D. | parabola |
| Answer» A. apex | |
| Explanation: conic sections are formed when a plane cuts through the cone at an angle with respect to the axis of the cone. if the angle is right angle then the conics is a circle, if the angle is oblique then the resulting conics are parabola and ellipse. | |
| 60. |
The locus of point moving in a plane such that the distance between a fixed point and a fixed straight line is constant is called as |
| A. | conic |
| B. | rectangle |
| C. | square |
| D. | polygon |
| Answer» A. conic | |
| Explanation: the locus of a point moving in a plane such that the distance between a fixed point and a fixed straight line is always constant. the fixed straight line is called as directrix and the fixed point is called as the focus. | |
| 61. |
The ratio of the distance from the focus to the distance from the directrix is called as eccentricity. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: the ratio of the distance from the focus to the distance from the directrix is called eccentricity. it is denoted as e. the value of eccentricity can give information regarding which type of conics it is. | |
| 62. |
Which of the following conics has an eccentricity of unity? |
| A. | circle |
| B. | parabola |
| C. | hyperbola |
| D. | ellipse |
| Answer» B. parabola | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix. it is denoted as e. the value of eccentricity can give information regarding which type of conics it is. the eccentricity of a parabola is the unity that is 1. | |
| 63. |
Which of the following has an eccentricity less than one? |
| A. | circle |
| B. | parabola |
| C. | hyperbola |
| D. | ellipse |
| Answer» D. ellipse | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix. it is denoted as e. the value of eccentricity can give information regarding which type of conics it is. the eccentricity of an ellipse is less than one. | |
| 64. |
If the distance from the focus is 10 units and the distance from the directrix is 30 units, then what is the eccentricity? |
| A. | 0.3333 |
| B. | 0.8333 |
| C. | 1.6667 |
| D. | 0.0333 |
| Answer» A. 0.3333 | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix. hence from the formula of eccentricity, e = 10 ÷ 30 = 0.3333. since the value of eccentricity is less than one the conic is an ellipse. | |
| 65. |
If the value of eccentricity is 12, then what is the name of the conic? |
| A. | ellipse |
| B. | hyperbola |
| C. | parabola |
| D. | circle |
| Answer» B. hyperbola | |
| Explanation: eccentricity is defined as the ration of the distance from the focus to the distance from the directrix. it is denoted as e. if the value of eccentricity is greater than unity then the conic section is called as a hyperbola. | |
| 66. |
If the distance from the focus is 3 units and the distance from the directrix is 3 units, then how much is the eccentricity? |
| A. | infinity |
| B. | zero |
| C. | unity |
| D. | less than one |
| Answer» C. unity | |
| Explanation: eccentricity is defined as the ration of the distance from the focus to the distance from the directrix and it is denoted as | |
| 67. |
If the distance from the focus is 2 mm and the distance from the directrix is 0.5 mm then what is the name of the conic section? |
| A. | circle |
| B. | ellipse |
| C. | parabola |
| D. | hyperbola |
| Answer» D. hyperbola | |
| Explanation: the eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix. it is denoted as e. if the value of the eccentricity is greater than unity then the conic section is called as a hyperbola. | |
| 68. |
Which of the following is a conic section? |
| A. | apex |
| B. | circle |
| C. | rectangle |
| D. | square |
| Answer» B. circle | |
| Explanation: conic sections are formed when a plane cuts through the cone at an angle with respect to the axis of the cone. if the angle is right angle then the conics is a circle, if the angle is oblique then the resulting conics are parabola and ellipse. | |
| 69. |
If the distance from the focus is 10 units and the distance from the directrix is 30 units, then what is the name of the conic? |
| A. | circle |
| B. | parabola |
| C. | hyperbola |
| D. | ellipse |
| Answer» D. ellipse | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix. hence from the formula of eccentricity, e = 10 ÷ 30 = 0.3333. since the value of eccentricity is less than one the conic is an ellipse. | |
| 70. |
If the distance from the focus is 2 mm and the distance from the directrix is 0.5 mm then what is the value of eccentricity? |
| A. | 0.4 |
| B. | 4 |
| C. | 0.04 |
| D. | 40 |
| Answer» B. 4 | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. therefore, by definition, e = 2 ÷ 0.5 = 4. hence the conic section is called as hyperbola. | |
| 71. |
If the distance from the focus is 3 units and the distance from the directrix is 3 units, then what is the name of the conic section? |
| A. | ellipse |
| B. | hyperbola |
| C. | circle |
| D. | parabola |
| Answer» D. parabola | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. therefore, by definition, e = 3 ÷ 3 = 1. hence the conic section is called as a parabola. | |
| 72. |
If the distance from the directrix is 5 units and the distance from the focus is 3 units then what is the name of the conic section? |
| A. | ellipse |
| B. | parabola |
| C. | hyperbola |
| D. | circle |
| Answer» A. ellipse | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. hence, by definition, e = 3 ÷ 5 = 0.6. hence the conic section is called an ellipse. | |
| 73. |
If the distance from a fixed point is greater than the distance from a fixed straight line then what is the name of the conic section? |
| A. | parabola |
| B. | circle |
| C. | hyperbola |
| D. | ellipse |
| Answer» C. hyperbola | |
| Explanation: the fixed point is called as focus and the fixed straight line is called as directrix. eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. if e is greater than one then the conic section is called as a hyperbola. | |
| 74. |
If the distance from a fixed straight line is equal to the distance from a fixed point then what is the name of the conic section? |
| A. | ellipse |
| B. | parabola |
| C. | hyperbola |
| D. | circle |
| Answer» B. parabola | |
| Explanation: the fixed straight line is called as directrix and the fixed point is called as a focus. eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. | |
| 75. |
If the distance from the directrix is greater than the distance from the focus then what is the value of eccentricity? |
| A. | unity |
| B. | less than one |
| C. | greater than one |
| D. | zero |
| Answer» B. less than one | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. therefore, by definition the value of eccentricity is less than one hence the conic section is an ellipse. | |
| 76. |
If the distance from the directrix is 5 units and the distance from the focus is 3 units then what is the value of eccentricity? |
| A. | 1.667 |
| B. | 0.833 |
| C. | 0.60 |
| D. | 0.667 |
| Answer» C. 0.60 | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. therefore, by definition, e = 3 ÷ 5 = 0.6. hence the conic section is called an ellipse. | |
| 77. |
If the distance from a fixed straight line is 5mm and the distance from a fixed point is 14mm then what is the name of the conic section? |
| A. | hyperbola |
| B. | parabola |
| C. | ellipse |
| D. | circle |
| Answer» A. hyperbola | |
| Explanation: the fixed straight line is called directrix and the fixed point is called as a focus. eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. | |
| 78. |
If the distance from the directrix is greater than the distance from the focus then what is the name of the conic section? |
| A. | hyperbola |
| B. | parabola |
| C. | ellipse |
| D. | circle |
| Answer» C. ellipse | |
| Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. therefore, by definition the value of eccentricity is less than one hence the conic section is an ellipse. | |
| 79. |
If the distance from a fixed straight line is equal to the distance from a fixed point then what is the value of eccentricity? |
| A. | unity |
| B. | greater than one |
| C. | infinity |
| D. | zero |
| Answer» A. unity | |
| Explanation: the fixed straight line is called as directrix and the fixed point is called as a focus. eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. | |
| 80. |
If the distance from a fixed point is greater than the distance from a fixed straight line then what is the value of eccentricity? |
| A. | unity |
| B. | infinity |
| C. | zero |
| D. | greater than one |
| Answer» D. greater than one | |
| Explanation: the fixed point is called as focus and the fixed straight line is called as directrix. eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix and it is denoted by e. | |
| 81. |
The cross-section is a when a plane is inclined to the axis and cuts all the generators of a regular cone. |
| A. | rectangular hyperbola |
| B. | hyperbola |
| C. | circle |
| D. | ellipse |
| Answer» D. ellipse | |
| Explanation: a cone is a solid or hollow object which tapers from a circular base to a point. here given an inclined plane which cuts all the generators of a regular cone. so the cross-section will definitely ellipse. | |
| 82. |
The curve formed when eccentricity is equal to one is |
| A. | parabola |
| B. | circle |
| C. | semi-circle |
| D. | hyperbola |
| Answer» A. parabola | |
| Explanation: the answer is parabola. circle has an eccentricity of zero and semi circle is part of circle and hyper eccentricity is greater than one. | |
| 83. |
The cross-section gives a when the cutting plane is parallel to axis of cone. |
| A. | parabola |
| B. | hyperbola |
| C. | circle |
| D. | ellipse |
| Answer» B. hyperbola | |
| Explanation: if the cutting plane makes angle less than exterior angle of the cone the cross- section gives a ellipse. if the cutting plane makes angle greater than the exterior angle of | |
| 84. |
The curve which has eccentricity zero is |
| A. | parabola |
| B. | ellipse |
| C. | hyperbola |
| D. | circle |
| Answer» D. circle | |
| Explanation: the eccentricity is the ratio of a distance from a point on the curve to focus and to distance from the point to directrix. | |
| 85. |
Rectangular hyperbola is one of the hyperbola but the asymptotes are perpendicular in case of rectangular hyperbola. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: asymptotes are the tangents which meet the curve hyperbola at infinite distance. if the asymptotes are perpendicular to each other then hyperbola takes the name of a rectangular hyperbola. | |
| 86. |
The straight lines which are drawn from various points on the contour of an object to meet a plane are called as |
| A. | connecting lines |
| B. | projectors |
| C. | perpendicular lines |
| D. | hidden lines. |
| Answer» B. projectors | |
| Explanation: the object will generally kept at a distance from planes so to represent the shape in that view projectors are drawn perpendicular to plane in orthographic projection. projectors are simply called lines of sights when an observer looks towards an object from infinity. | |
| 87. |
When the projectors are parallel to each other and also perpendicular to the plane, the projection is called |
| A. | perspective projection |
| B. | oblique projection |
| C. | isometric projection |
| D. | orthographic projection |
| Answer» D. orthographic projection | |
| Explanation: in orthographic projection, the projectors are parallel to each other and also perpendicular to the plane but in oblique projection, the projectors are inclined to the plane of projection and projectors are parallel to each other. | |
| 88. |
In the Oblique projection an object is represented by how many views? |
| A. | one view |
| B. | two views |
| C. | three views |
| D. | four views |
| Answer» A. one view | |
| Explanation: oblique projection is one method of pictorial projection. oblique projection shows three dimensional objects on the projection plane in one view only. this | |
| 89. |
The object we see in our surrounding usually without drawing came under which projection? |
| A. | perspective projection |
| B. | oblique projection |
| C. | isometric projection |
| D. | orthographic projection |
| Answer» A. perspective projection | |
| Explanation: perspective projection gives the view of an object on a plane surface, called the picture plane, as it would appear to the eye when viewed from a fixed position. it may also be defined as the figure formed on the projection plane when visual rays from the eye to the object cut the plane. | |
| 90. |
In orthographic projection, each projection view represents how many dimensions of an object? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» B. 2 | |
| Explanation: in orthographic projection and oblique projection the projection planes which represent one view of an object only shows width, height; width, thickness; height, thickness only but in isometric and perspective projections width, height and thickness can also be viewed. | |
| 91. |
In orthographic projection an object is represented by two or three views on different planes which |
| A. | gives views from different angles from different directions |
| B. | are mutually perpendicular projection planes |
| C. | are parallel along one direction but at different cross-section |
| D. | are obtained by taking prints from 2 or 3 sides of object |
| Answer» B. are mutually perpendicular projection planes | |
| Explanation: by viewing in mutual perpendicular planes- vertical plane, horizontal plane, profile plane which indirectly gives us front view in x-direction, top-view in y –direction and thickness in z- direction which are mutually perpendicular. ortho means perpendicular. | |
| 92. |
To represent the object on paper by orthographic projection the horizontal plane (H.P) should be placed in which way? |
| A. | the h.p is turned in a clockwise direction up to 90 degrees |
| B. | the h.p is turned in anti-clockwise direction up to 90 degrees |
| C. | h.p plane is placed to left side of vertical plane parallel to it |
| D. | h.p plane is placed to right side of vertical plane parallel to it |
| Answer» A. the h.p is turned in a clockwise direction up to 90 degrees | |
| Explanation: the vertical plane and horizontal plane are perpendicular planes intersected at reference line. so on paper to represent perpendicular planes any of the planes should arrange to get a real picture of required projection. | |
| 93. |
The hidden parts inside or back side of object while represented in orthographic projection are represented by which line? |
| A. | continuous thick line |
| B. | continuous thin line |
| C. | dashed thin line |
| D. | long-break line |
| Answer» C. dashed thin line | |
| Explanation: continuous thick line is used for visible outlines, visible edges, crests of screw threads, limits of full depth thread etc. continuous thin line is used for extension, projection, short centre, leader, reference lines, imaginary lines of intersection etc. | |
| 94. |
Orthographic projection is the representation of two or more views on the mutual perpendicular projection planes. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: orthographic projection is the representation of two or more views on the mutual perpendicular projection planes. but for oblique projection, the object is viewed in only one view. and in isometric view the object is kept resting on the ground on one of its corners with a solid diagonal perpendicular to the v.p. | |
| 95. |
In perspective projection and oblique projection, the projectors are not parallel to each other. |
| A. | true |
| B. | false |
| Answer» B. false | |
| Explanation: in oblique projection the projectors are parallel to each other but inclined to projection plane but in perspective projection all the projectors are not parallel to each other and so to projection plane. | |
| 96. |
What is additional 3rd view on orthographic projection in general for simple objects? |
| A. | front view |
| B. | top view |
| C. | side view |
| D. | view at 45 degrees perpendicular to horizontal plane |
| Answer» C. side view | |
| Explanation: in general for simple objects engineers use only front view and top view or else front view and side view or else top view and side view. if every view is visualized side view gives height and thickness of object. | |
| 97. |
The front view of an object is shown on which plane? |
| A. | profile plane |
| B. | vertical plane |
| C. | horizontal plane |
| D. | parallel plane |
| Answer» B. vertical plane | |
| Explanation: the front view will be represented on vertical plane, top view will be represented on horizontal plane and side view will be shown on profile plane. the front view shows height and width of object. | |
| 98. |
The Top view of an object is shown on which plane? |
| A. | profile plane |
| B. | vertical plane |
| C. | horizontal plane |
| D. | parallel plane |
| Answer» C. horizontal plane | |
| Explanation: the front view will be shown on vertical plane, top view will be represented on horizontal plane and side view will be represents on profile plane. the top view gives thickness and width of the object. | |
| 99. |
The side view of an object is shown on which plane? |
| A. | profile plane |
| B. | vertical plane |
| C. | horizontal plane |
| D. | parallel plane |
| Answer» A. profile plane | |
| Explanation: the front view will be represents on vertical plane, top view will be shown on horizontal plane and side view will be represents on profile plane. the side view gives height and thickness of object. | |
| 100. |
The 3rd quadrant is in which position? |
| A. | below h.p, behind v.p |
| B. | above h.p, behind v.p |
| C. | above h.p, in-front of v.p |
| D. | below h.p, in-front of v.p |
| Answer» A. below h.p, behind v.p | |
| Explanation: the position of reference planes will be similar to quadrants in x, y plane co-ordinate system. as the 3rd quadrant lies below the x-axis and behind the y-axis here also the 3rd quadrant is below h.p, behind v.p. | |
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