NEPAL ENGINEERING SERVICES

Tuesday, May 21, 2019

IOE entrance Aptitude Test: Part I (Isometric figures)



Welcome to Nepal Engineering Services.

In this section we will deal with different topics from which questions are asked in IOE Entrance exam. In this post we will discuss about the engineering aptitude topics. The topics of engineering aptitude from which questions are asked are:
1. Concept of Polygons (Triangle, Square, Pentagon, Hexagon, Octagon),

Circle, Inscribing and Circumscribing Circle;

Arcs and Tangents;

Introduction to Geometrical Solids (Cylinder, Cone, Prism and Pyramid)

Orthographic Views of Lines and Surface (Horizontal, Vertical and Inclulined),

Orthographic Views of Geometrical Solids,

Objects consisting of Plane Surfaces,

Curved Surfaces and Rectangular/cylindrical holes.


2. Two-Stroke and Four Stroke Engines,

Petrol and Diesel Engines,

Renewal Energy.


3. Traffic Signals,

Cement,

Aggregates,

Bricks and Stones.


4. Series and Parallel Electric Circuits,

Energy Resources,

Transformers,

Electrical Energy Generation,

Measurement of Electric Current,

Voltage and Power.


5. Number System,

Diode and Transistor,

Logic Gates,

Memory,

CPU,

Input/output Devices,

Operating Systems,

Internet and Email.












Isometric Drawings

Isometric drawings are pictorial drawings showing the three principal dimensions of an object in a single view. The principal dimensions are the overall sizes for the object along the three principal directions. The drawings are rotated through 45 degree about vertical axis and tilting downwards at 35.27 degree.

There are three types of isometric drawings. They are:

1. Regular
2. Reverse
3. Long-axis


In IOE entrance exam, generally two types from isometric drawings are asked and we can say that two questions are regularly from this topic. From this topic, one theory question is asked and one drawing is asked.

A) Drawing type questions::

Before we dive directly into the questions, we ought to have some knowledge on different types of view of an object. The views we need to know about are:
Plan view or top view: In this view we see any object from its top angle and express it in 2-d figure. For example:
- The top view of a ball is circle
- the top view of a cuboid is a cube.
- the top view of a cube is a square.
- the top view of a cone is circle with a dot in the centre.
Side views:
- left side view: In this view we see the objects from the left side and express it in the 2-d drawings.
-Right side view: In this view we see the objects from the right side and express it in the 2-d drawings.
Front view: In this view we see the objects or solid from the front portion.
For examples:
























Points to be remembered while finding the views:

1. The visible outer line are represented by solid lines.
2. The edges which are present but cant be seen from certain view are represented by dotted lines.
3. We should be careful while dealing with the stepped solids, as we may get confused in solid lines.
4. The arrow in a isometric view defines the front view.

B) Theoritical Questions: Above facts are generally asked in theory questions.
Some examples of solids and their views are:




















Some questions for practices that may be asked in IOE entrance exam::
1. If isometric projection of an object is drawn with true lengths the shape would be same and size is how much larger than actual isometric projection?
a) 25%
b) 29.5%
c) 22.5%
d) 33.3%



2. Identify the front view of the below isometric view.
 
a)
b)

c)

d)






3. If an isometric drawing is made use of isometric scale then the drawings are called ___________
a) Isometric projection
b) Isometric view
c) Isometric perception
d) Orthographic view


4. Identify the side view of the below isometric view.


a)


b)


c)


d)



5. If an isometric projection is drawn with true measurements but not with isometric scale then the drawings are called ____________
a) Isometric projection
b) Isometric view
c) Isometric perception
d) Orthographic view



6. Identify the top view of the below isometric view.




a)


b)


c)


d)




7. Identify the front view of the below isometric view.


a)


b)


c)


d)




8. Identify the side view of the below isometric view.


a)


b)


c)


d)

(answers: 1.c, 2.a, 3.a, 4.b, 5.b, 6.a, 7.b)
Soon we will be back with further topics on IOE entrance exam.

No comments:

Post a Comment