NEPAL ENGINEERING SERVICES

Friday, May 24, 2019

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)

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