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Showing posts with label IOE Entrance Exam. Show all posts
Showing posts with label IOE Entrance Exam. Show all posts

Friday, May 24, 2019

IOE Entrance Physics Part I: Capacitor.

Welcome to Nepal Engineering Services.


Every conductor has capacity to store charges, and the conductor that stores both positive and negative charges is called capacitor. It is also called condenser.


Capacitance=(Magnitude of charge on plate/Potential difference between the plates)
C=(Q/V)


Parallel Plate Capacitors:
Parallel plate capacitors are a type of capacitors which have two plates(electrodes) and dielectric(insulating material). The two plates are equal in size and parallel to each other with certain gap filled with dielectric. 

Electric field between parallel plate capacitors 
=  (σ/2εo)+(σ/εo)

Capacitance

=(εoA/d)
=(
εoA/(d-t(1-1/k)))

Spherical Capacitor(Concentric Spheres):
C=4
πεokab/(a-b)

For single Sphere:

C=4πεoa

Combination of Capacitors:

1) Series Capacitors:
Q1=Q2=Q3=Q4
V=V1+V2+V3
(1/C)=(1/C1)+(1/C2)+(1/C3)
  •  Charge remains same in all capacitors.
  • Potential difference is different in each capacitor.

 2) Parallel Capacitors:

Q=Q1+Q2+Q3+Q4
V1=V2=V3=V4
C=C1+C2+C3+C4

  • Charge is different in each capacitor
  • Potential difference is same in each capacitor.
Energy Stored in Capacitor:
U=CV²/2
  = Q
²/2C
  = QV/2

Energy Density: E=V/d

Cylindrical Capacitor:
C = \dfrac{2 \pi \epsilon_0 \epsilon_r L }{\log_e \left( \dfrac{R_2}{R_1}\right)} F


Some questions asked in IOE entrance exams are:

  In a 20 Vac series RC circuit, if 20 V is measured across the resistor and 40 V is measured across the capacitor, the applied voltage is:
a. 45V b. 50 V c. 55V d. 60V

 Capacitor is a device used to__________
a) store electrical energy
b) vary the resistance
c) store magnetic energy
d) dissipate energy

 Capacitor stores which type of energy?
a) kinetic energy
b) vibrational energy
c) potential energy
d) heat energy

Which of the following is a passive device?
a) Transistor
b) Rectifier
c) Capacitor
d) Vaccuum Tubes



For which medium capacitance is high?
a) Air
b) Mica
c) Water
d) Metal


Van de Graaf generator is used to
(a) measure high potential difference
(b) produce high DC potential
(c) produce high AC potential
(d) compare high DC potential
 

 The unit of electric field strength is
(a) Newton/Coulomb
(b) Volt/meter
(c)Joule/Coulomb x meter
(d) all of above

 Two identical capacitors are joined in parallel, charged to potential V, separated and then connected in series i.e. the positive plate of one is connectei to the negative plate of other
(a) the charge on the free plates connected together are destroyed
(b) charges on the free plates are enhanced
(c) the energy stored in the system increases
(d) the potential difference between the free plates is 2 V

In order to increase the capacity of a parallel- plate condenser one should , introduce between the plates a sheet of 、
(a)Tin
(b) copper 
(c) mica
(d) steel 2,

To a given capacitor another is connected in parallel to
(a) increase the capacitance
(b)decrease the capacitance
(c) increase its active life
(d) improve performance

For more Topics on IOE entrance exam you may visit:
Institute of Engineering (IOE) Nepal Entrance exam (BE and BArch): Exam leading you to the path of being an engineer and architecture.

IOE entrance Aptitude Test: Part I (Isometric figures)

IOE entrance Aptitude Test: Part II (Input devices, Output devices and Operating System)

IOE entrance Aptitude Test: Part III: Traffic Signals, Signs, Number system, Storage units, Renewable energy, Non-renewable energy

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IOE entrance Aptitude Test: Part III: Traffic Signals, Signs, Number system, Storage units, Renewable energy, Non-renewable energy



Welcome to Nepal Engineering Services.

Traffic lights: Traffic lights are the equipment set in order to control the movement of traffic.Traffic signals are the signs and symbols that give information on road conditions, way to drive, and mandatory things to do while riding.

Traffic rules are the laws that states the methods of driving with necessary conditions to be followed while driving.




Colors Of Traffic Light
Red - To stop the traffic:
Bring your vehicle to complete stop before the crosswalk and start when the light turns green.

Amber - Caution:
If your have entered the intersection and the light turns to amber, move on very carefully. If you see the amber light before entering the crossing, stop the vehicle behind the stop line or cross walk.

Green - Go on:
It means to let the pedestrian go through crossroads.

Blue signs help in finding motor services.

Constructions works are represented by orange signs.

Brown signs represents public recreation.

Diamond signs may amplify for seasonal hazards.

Flashing signals:
A flashing red light means to stop the vehicle immediately and move through the intersection where in it safe.
A flashing amber signal warns to drive with caution.

Pedestrian signals:
These signals help pedestrians cross intersections safely.

If you face a steady red human figure, do not enter the road. If the yellow signal starts flashing, cross the road quickly if you are already on the road. Stop, if you are about to join the road. Walk cautiously if you face a steady green human figure.

Types of traffic signs::
1. Regulatory Signs
Regulatory signs are the signs that provide information that you need to avoid. For eg. detour signs, weigh station signage, and railroad crossing signs.

2. Warning Signs

These signs give you future warnings that may occur. They may suggest hazards, speed changes, lane merge, curve warnings, hill warnings, pedestrian crossings, etc.

3. Guide Signs

These signs provide you guidance while travelling like GPS navigation.

Sizes of traffic lights
There are two sixes for traffic signal.
1. 8 inches lens: The 8inches traffic signal are 30 inches tall and 9.5 inches wide and 6 inches deep.
2.12 inches lens: The 12 inches traffic signal are 42 inches tall, 13.5 inches wide and 8 inches deep.

Storage units

1byte: 8 bits
1byte: 2 nibbles
1 nibble: 4 bits
1 kilobyte: 1024 bytes
1 megabyte: 1024 kilobytes
1 Gigabyte: 1024 megabytes
1 Terabyte: 1024 gigabytes
1 Petabyte: 1024 terabytes
1 Exabyte: 1024 petabytes
1 Zettabyte: 1024 exabytes
1 Yottabyte: 1024 yottabytes

Number systems

1) Decimal Number System: Base 10.Digits used:0 to 9
2) Binary number system:
Base 2. Digits used : 0, 1
3) Octal Number System: Base 8. Digits used : 0 to 7
4) Hexa Decimal Number System: Base 16. Digits used: 0 to 9, Letters used :A-F

Calculating Decimal Equivalent from Binary
Binary number 1101211012= ((1 x 23) + (1 x 22) + (0 x 21) + (1 x 20))10

=(8+ 4 + 2 + 1)10

= (15)10 Decimal number

Calculating Decimal Equivalent from Octal Number: 5708

=((5 x 82) + (7 x 81) + (0 x 80))10

=(320 + 56 + 0)10

=37610

Calculating Decimal Equivalent from (FDE)16

(FDE)16= ( (F x 162) + (D x 161) + (E x 160))10

=((15 x 162) + (13 x 161) + (14 x 160))10

= (3840 + 208 + 14)10

= (4062)10


Decimal to Other Base System
Step 1 − Divide the decimal number to be converted by the value of the new base.
Step 2 − Get the remainder from Step 1 as the rightmost digit (least significant digit) of the new base number.
Step 3 − Divide the quotient of the previous divide by the new base.
Step 4 − Record the remainder from Step 3 as the next digit (to the left) of the new base number.
Repeat Steps 3 and 4, getting remainders from right to left, until the quotient becomes zero in Step 3. the remainders have to be arranged in the reverse order.

Renewable energy sources: The sources of energy which can be obtained again and again as they get replenished are called renewable energy sources. For eg.
Solar energy
Wind Power
Hydroelectric energy
Biomass Hydrogen and fuel cells
Geothermal power.

Non-renewable energy sources: The sources of energy which don't get replenished are called non-renewable source of energy. For eg.
Fossil fuels
Coals
Natural gas
Oil

Some Questions that were asked frequently in IOE entrance exam
1. Which color light is in middle position?
a) Green  b)Amber

c) Red    d) Black

2. Which of the following statement is true both for a series and parallel D.C. Circuit?
a)Powers are additive
b) voltages are additive
c) currents are additive
d) elements have individual currents.

3. Which of these is not a renewable source of energy?
a) The sun
c) Wind
d) Ocean tidal energy

4. Which of the following sign denotes that pedestrian are prohibited from crossing the road?
a) Red Standing Man
b) Green Walking Man
c) Flashing Green Man
d) none


5. Parallel circuit is
a) Power divider circuit
b) Current divider circuit
c) Charge divider circuit
d) all of these.

6. In Nepal, Biogas plants using cattle dung are also known as....
a) hydel plants
b) gobar gas plants
c) thermal power station
d) gas station

7. No parking is a/an...
a) regulatory
b) warning
c) information
d) none

8. Series circuit is
a) Voltage divider circuit
b) Current divider circuit
c) Charge divider circuit
d) all of these

9. Which of the following is non energy?
a) Traditional bio-mass energy
b) agricultural residues
c) animal wastes
d)all of these

10. Biodiesel is made from
a) vegetable oil
b) animal fats
c) recycled greases
d) all of the

11.Pedestrians may cross the road with care.
a) Red Standing Man
b)Green Walking Man
c) Flashing Green Man
d) none

12. Series circuit is
a)Voltage divider circuit
b) Current divider circuit
c) Charge divider circuit

13. One nibble is equal to..
a) 2 bit b) 3 bit c) 4 bit d) 5 bit

14. Which one is not a non-conventional source of energy?
a) Wind power
b) Tidal power
c) Nuclear energy
d) Geo-thermal energy

15. Which of the following sign denotes that pedestrian are prohibited from crossing the road.
a)Red Standing Man
b) Green Walking
c) Flashing Green Man
d) none

16. The resistance of two wires is 25 ohm when connected in series and 6 ohm when joined in parallel. The resistance of each wire is

a) 5 ohm, 10 ohm   b) 10 Ohm,20 Ohm

c)10 Ohm,15 Ohm  d) 20 Ohm, 300

17. Solar energy stored in material such as wood, grain, sugar, and municipal waste is called
a)biomass
b) fossil fuels
c) geothermal energy
d)natural gas

18. Hindu counting system was first used about
a) 600AD b)500 AD c) 500BC d) 609BC


19. Which of the following sign denotes that pedestrian are prohibited from crossing the road except where they have started to cross the road, in which case they should continue to cross the road.
a) Red Standing Man
b) Green Walking Man
c) Flashing Green Man
d) none


20. Two resistances p1 and p2 give combined resistance of 4.0 ohms when in series and 1 ohm when in parallel. The resistances are
b) 2ohms each
a) 1.5 and 2.5 ohms
c) 3 and 1 ohm

21. Which out of the following is a non-conventional source of energy?
a) Atomic energy
b) Firewood
c) Coal
d) Natural gas

22. (109)10-(?)16
a) 100
b) 200
d) 6
c) 6A

23. Which of the following sign denotes that pedestrian are prohibited from crossing the road
a) Red Standing Man
b) Green Walking Man
c) Flashing Green Man
d) none

24. The resistance of two wires is 25 ohm when connected in series and 6 ohm when joined in parallel. The resistance of each wire is
a) 5 ohm,10 ohm
c) 10 Ohm, 15 Ohm
d) 20 Ohm, 300hm

For more contents on you can go to
Institute of Engineering (IOE) Nepal Entrance exam (BE and BArch): Exam leading you to the path of being an engineer and architecture.
IOE entrance Aptitude Test: Part I (Isometric figures)

IOE entrance Aptitude Test: Part II (Input devices, Output devices and Operating System)

Wednesday, May 22, 2019

IOE entrance Aptitude Test: Part II (Input devices, Output devices and Operating System)


Welcome to Nepal Engineering Services.

1. Input Devices: Input devices are the hardware device that conveys data to a computer, in order to interact with softwares and users in order to make work convincing.

2. Output Devices: The devices which sends information from computer to another device or user in the form of hard-copy or soft-copy are called output devices.

3. CPU: CPU stands for Central Processing Unit which performs most of the processes inside a computer and produces information.


Examples::


Input device                        Output devices                     Processing Units            

Cameras                                Monitor                                   CPU
Graphics Tablets                   Printers
Video Capturing devices       Plotters
Barcode reader                      LCD Projection Panels
Gamepad                               Speaker
Joystick                                 Headphone
Keyboard                               Film Recorder
Microphone                           Visual Display Unit
Mouse                                    Microfiche
Scanner
Webcam
Touchpads
Pen input
OCR
OMR
Punch Card Reader
MAgnetic ink card reader
MAgnetic tape drive


Both Input and Output Devices

MODEMS
Network Cards
Touch Screen 
Headsets 
FAX (Facsimile)
Sound Cards

4. Operating System::
 An operating system is a software that allows a user to run the applications of a computer providing a medium between hardware and softwares. 
The operating system manages a computer's hardware resources, including:
  • Input devices such as a keyboard and mouse
  • Output devices such as display monitors, printers and scanners
  • Network devices such as modems, routers and network connections
  • Storage devices such as internal and external drives
 Some practice questions::

1. Which of the following is not an example of hardware?
A) Scanner                                                                                          B) Printer
C) Monitor                                                                                          D) Interpreter

2. Which of the following is not an output device?
A) Plotter                                                                                            B) Printer
C) Scanner                                                                                          D) Monitor

3. The most widely used input device is the ____
A) Mouse                                                                                            B) Keyboard
C) Modem                                                                                          D) Monitor
 
4.The scanning technology, used in banks, to read the numbers at the bottom of checks is
  • A. MICR

  • B. OCR

  • C. OMR

  • D. GRE

5. A mouse,touch screen, and a trackball are all examples of _______________________
  • A. Scanning Device

  • B. Voice-Input Device

  • C. Pointing Device

  • D. Output Device

6. The input device that rolls on a desktop and controls the position of the cursor on then on the screen is called a
  • A. Touch Screen

  • B. Light Pen

  • C. Digitizer

  • D. Mouse

7. ______ shares characteristics with both hardware and software
  • A. Operating system

  • B. Software

  • C. Data

  • D. None

8. The operating system creates _____ from the physical computer
  • A.Virtual space
        
  • B. Virtual computers

  • C. Virtual device

  • D. None

     



    We will be back with more topics on IOE entrance exam notes. Please comment and like  Facebook Page for more updates.

    Also you can see:IOE entrance Aptitude Test: Part I (Isometric figures)

    You may visit IOE Entrance Exam For more contents.

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.