Indian Coast Guard Navik GD Mock Test - 8 - Indian Coast Guard Navik GD/DB MCQ

⇒ (2/1000) × (5/10)

⇒ (10/10000)

⇒ (1/1000) = 0.001

∴ 0.002 x 0.5 = 0.001

Since I is the first letter,

The remaining four letters ‘N, D, I and A’ will shuffle.

So the answer = !4 = 4 × 3 × 2 × 1 = 24

Since 39 persons can repair a road by working 5 hours in a day in 12 days.
∴ 1 persons can repair a road by working 5 hours in a day in 39 x 12 days.
∴ 1 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 days.
∴ 30 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 / 30 days.
∴ 30 persons can repair a road by working 6 hours in a day in 39 x 12 x 5 / 30 x 6 days.
∴ 30 persons can repair a road by working 6 hours in a day in 39 x 2 x 1 / 6 days.
∴ 30 persons can repair a road by working 6 hours in a day in 39 x 1 x 1 / 3 days.
∴ 30 persons can repair a road by working 6 hours in a day in 13 days.

Through O, draw a line l parallel to both AB and CD. Then
∠1 = 45° (alt. ∠S)
and ∠2 = 30° (alt. ∠S)
∴ ∠BOC = ∠1 + ∠2 = 45° + 30° = 75°
So, X = 360° – ∠BOC = 360° – 75° = 285°
Hence X = 285°.

Interest of 2 years at 10% p.a. = 10% × 2 = 20%
Interest of 4 years at 10% p.a. = 10% × 4 = 40%

15% : 5% = 3 : 1

Hence, Option B is correct.

−14+6b+7−2b=1+5b
−7+4b=1+5b
4b−5b=1+7
−b=8
b=−8

2/7 in a leap year there are 366 days means 52 weeks and 2days. So already we have 52 Fridays. Now the rest two days can be (Sunday, Monday), (Monday, Tuesday), (Tuesday, wed), (Wednesday, Thursdays), (Thursday, Friday), (Friday, sat), (sat, sun) so, the probability of 53 Fridays= 2/7
Option 3 is the correct answer

1 hour 45 minutes = 1.75 hours

Speed of stream = 30 – 16 = 14 km/hr
So the answer = 30 + 14 = 44 km/hr
Hence, Option D is correct.

Hence, Option C is correct.

Using Rule 1,
Part of tank filled by pipes A and B in 2 hours

Remaining part = 
This part is filled by pipe B.

A : C = 200 : 182.


When C covers 182 m, B covers 169 m.
When C covers 350 m,         

Therefore, C beats B by (350 - 325) m = 25 m.            

Old ratio of A & B 20,000 : 30,000 = 2 : 3 (They share profit in the ratio of their capitals)
So A’s share is 2/5 and B’s share is 3/5
New Share of A will be in the ratio of 3 : 4 : 3 i.e. A = 3/10; B = 4/10 = 2/5
Now we have to find their sacrificing shares and then the ratio.
Now A’s sacrifice = Old share – New share =>>> 2/5 – 3/10 = 1/10, and B’s sacrifice = 3/5 – 2/5 = 1/5
Hence the ratio in which the premium is be divided between A and B is 1/10 : 1/5 = 1 : 2 (option ‘A’)

Profit = 6 – 5 = 1

Hence, Option C is correct.

There should be 24 in place of 36.
Hence, Option C is correct. 

Let AB be the kite and AC be the level ground
So that BC - AC.
At that point, ∠BAC = 60°and BC = 75m. Let AB = x meters.
Presently AB/BC = coses60° = 2/ √3
=> x/75 = 2/√3 => x = 150/√3 = 150 * √3/3 = 50 √3m.
∴ Length of the string = 50 √3m.

Total balls = 6 + 4 = 10
Total white balls = 4
Selecting 2 white balls from four

Selecting 2 white balls from ten

According to question,
A shadow of length 40.25 meters is build for a height of 17.5 meters.
A shadow of length 1 meters is build for a height of 17.5 /40.25 meters.
A shadow of length 28.75 meters is build for a height of 17.5 x 28.75 /40.25 meters.
A shadow of length 28.75 meters is build for a height of 17.5 x 2875 /4025 meters.
A shadow of length 28.75 meters is build for a height of 17.5 x 575 /805 meters.
A shadow of length 28.75 meters is build for a height of 17.5 x 115/161 meters.
A shadow of length 28.75 meters is build for a height of 12.5 meters.

The figure is as follows:

Assuming, the radius of circle be r.
Then,
AB = BC = CA = 2r
So, all the three sides are equal of the triangle.
△ABC is an equilateral triangle.
Hence, the required answer is equilateral triangleequilateral triangle.

We assume that,

x₁ = 2, y₁ = 5, x₂ = 5 & y₂ = 2 Point C: (x,y)
Line divides the line segment in the ratio m₁ : m₂  
This is known as internal division.

Point C satisfies the equation of line.

Isaac Newton discovered the laws of motion, which are fundamental principles governing the motion of objects. His laws, known as Newton's laws of motion, laid the foundation for classical mechanics.

The SI unit of electric resistance is the ohm. It is defined as the resistance between two points of a conductor when a constant potential difference of one volt, applied to these points, produces a current of one ampere.

To convert from miles to kilometers, you multiply by 1.6 approximately since there are 1.6 kilometers in 1 mile.

An example of an exothermic reaction is (b) Combustion. Exothermic reactions release energy in the form of heat or light. Combustion reactions involve the rapid combination of a fuel with oxygen, resulting in the release of heat and light energy.

The correct electronic configuration of sodium is 2,8,1 (option A).

This means that sodium has 11 electrons. The first energy level can hold a maximum of 2 electrons, the second energy level can hold a maximum of 8 electrons, and the third energy level can hold a maximum of 8 electrons as well.

Therefore, the electronic configuration of sodium is 2 electrons in the first energy level (written as 2), 8 electrons in the second energy level (written as 8), and 1 electron in the third energy level (written as 1).

Radon, a Noble Gas, is located at the bottom right corner of the periodic table.

The number of unpaired electrons is determined by the electron configuration of an atom, specifically the number of electrons in the outermost orbitals (also known as valence electrons). In the periodic table, elements are arranged in order of increasing atomic number. The atomic number corresponds to the number of protons in an atom and, in a neutral atom, also the number of electrons.

Without further information on what elements X, Y, Z, and W represent, it's impossible to provide a specific explanation. However, if we assume that the numbers before each letter represent the atomic number of the elements, then 7Y would represent Nitrogen, which has 5 electrons in its outer shell, 3 of which are unpaired. This is more than elements with atomic numbers 6, 9, and 13 (Carbon, Fluorine, and Aluminum, respectively), which have fewer unpaired electrons in their outer shells.

Therefore, if the numbers before each letter represent the atomic numbers of the elements, then 7Y (Nitrogen) would have the maximum number of unpaired electrons.

A reducing agent is the substance that is oxidized in a redox reaction.

• Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are discharged into the air.
• These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
• Human activities are the main cause of acid rain.
• Over the past few decades, humans have released so many different chemicals into the air that they have changed the mix of gases in the atmosphere.
• Power plants release the majority of sulfur dioxide and much of the nitrogen oxides when they burn fossil fuels, such as coal, to produce electricity.
• Besides, the exhausts from cars, trucks, and buses release nitrogen oxides and sulfur dioxide into the air. These pollutants cause acid rain.

Ethanoic acid is commonly known as acetic acid. It is a weak acid with a sour taste and a pungent smell. Acetic acid is widely used in the production of vinegar, dyes, and pharmaceuticals.