RRB NTPC Mock Test - 12 (English) - Railways MCQ

• A photocell converts light energy into electrical energy. There are mainly three kinds of photocells, which are photovoltaic, photoconductive, and photo emissive.
• The Photoelectric effect was explained by Albert Einstein.

• There were 395 articles originally in the Constitution of India.
• Presently 448 articles are there in Constitution.
• Indian Constitution was originally written in English.
• Prem Behari Narain Raizada wrote the Indian constitution by hand.
• Dr. BR Ambedkar is known as the father of the Indian Constitution.
• Indian Constitution was adopted by the Constituent Assembly of India on 26 November 1949 and became effective on 26 January 1950.

1) Ashwini got more marks than all of them. Jay got more marks than two of them.

Ashwini > ……. > ……. > Jay > …… > …….

2) Jagannath got less marks than only Ashwini.

Ashwini > Jagannath > ……. > Jay > …… > …….

3) Saurav got less marks than 5 persons.

(Therefore Saurav got the least marks)

Ashwini > Jagannath > ……. > Jay > …… > Saurav

4) Harshita got more marks than Jay while Sakshi got less marks than Jay.

Ashwini > Jagannath > Harshita > Jay > Sakshi > Saurav

Hence, four people scored more than Sakshi.

• The Mars Orbiter Mission was launched from the Satish Dhawan Space Centre Andhra Pradesh, using a Polar Satellite Launch Vehicle (PSLV) C25 XL on 5 November 2013.
• It is one of the world's most reliable launch vehicles.
• The XL variant was earlier used to launch Chandrayaan (2008), GSAT-12 (2011) and RISAT-1 (2012).
• MOM is India's first venture into the interplanetary space.
• It will explore and observe Mars surface features, morphology, mineralogy and the Martian atmosphere.

Let the third proportion be a

(x² – y²) : (x – y) :: (x – y) : a

a = (x – y)² /(x2 – y2)= (x – y)/(x + y)

If sin B = 24/25

sin B = Perpendicular/Hypotenuse = AC/AB = 24/25

Taking AC = 24 * x ,  AB = 25 * x and BC=3.5 cm

By the Pythagoras theorem, x = 0.5

⇒ AC =24 * x =12 cm

=>AB = 25 * x = 12.5 cm

∴ The length of AB is 12.5 cm

Dry ice is the solid form of Carbon Dioxide. It has lower temperature than the water ice and is used as a cooling agent. 

• The World Kidney Day 2019 was observed on March 14, 2019.
• This Day is observed annually on the second Thursday of March.
•  It aims to raise awareness about the importance of our kidneys.
• Theme: ‘Kidney Health for Everyone Everywhere’.

Together P and Q complete 5/12^th part of the work

∴ Part of work completed by R

= 1 - (5/12)

= 7/12

The total amount for the work = Rs. 48000

∴ Share of R = (7/12) × 48000

= 7 × 4000

= 28000

Thus there are 6 triangles in the given figure.

• The ratio of length and breadth of the Indian national flag is 3 : 2.
• It is a horizontal tricolor of deep saffron (Kesari) at the top, white in the middle and dark green at the bottom in equal proportion.
• It became the official flag of the Dominion of India on 15 August 1947.
• Pingali Venkayya is considered as the designer of the Indian National Flag.

• Present Finance Minister - Arun Jaitley
• The Finance Minister during the budget presentation was Piyush Goyal. He proposed that individuals having an income of up to rupees five (5) lakh will have not have to pay any tax.
• Even persons having a gross income up to rupees 6.5 lakh may not be required to pay any income tax if they make investments in Provident Funds and specified savings and insurance.

• The Gokak Falls is located in Belagavi, Karnataka on the Ghataprabha River.
• Gokak gets its name due to the Goki trees found in abundance in these areas.
• Its shape, color, height and speed helped it earn the tag of 'mini Niagara’.

Solving the given options:

(6 + 6 + 6)² = 18²  = 324

{(6 + 6)²}² =  (12²)² = 20736

(6 × 6 × 6)² = (216)² = 46656

6 + 6² + (6)³ = 6 + 36 + 216 = 258

∴ On comparing all the options, (6 × 6 × 6)² is the largest number.

• Municipal Corporation is the biggest local urban government.
• Municipal Council is for the smaller urban area.
• Nagar Panchayat is for areas in transition from rural to urban.

Average = (sum of elements)/number of elements

Given,

The average of 6 numbers is 18.

Sum of 6 numbers = 18 × 6 = 108

Given,

If one number is excluded, the average becomes 17.

Average of 5 numbers = 17

Sum of 5 numbers = 17 × 5 = 85

Excluded number =

= sum of 6 numbers - sum of 5 numbers

= 108 - 85

= 23

∴ The excluded number is 23.

• Due to the Earth's rotation wind movements across the Earth's surface are diverted to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
• The rotation of the earth about its axis affects the direction of the wind. This force is called the Coriolis force.
• It not only affects wind movement but it influences all of the movements across the Earth's surface.
• This direction is determined by Farrell’s Law.

• As per the interim budget of 2019, a separate department of Fisheries will be created.
• Additionally, 2 percent interest subvention to farmers pursuing animal husbandry and fisheries will also be given.
• NOTE: A separate department for fisheries and a separate commission for cows will be created.

On arranging given word as per dictionary order,

i. Faculty
iii. Faint
ii. Faith
iv. Familiar

Hence, “I, iii, ii, iv” is correct order as per dictionary.

Let the elements of matrix be A₁₁, A₁₂, A₂₁, and A₂₂ as shown

Then,

(A₁₁ + A₁₂ + A₂₁) - 2 = A₂₂

In Matrix 1 → 4 + 7 + 3 - 2 = 14 - 2 = 12.

In Matrix 2 → 3 + 7 + 5 - 2 = 15 - 2 = 13.

Similarly,

In Matrix 3 → 6 + ? + 8 - 2 = 17 → ? = 17 - 12 = 5.

Hence, 5 is the correct answer.

• An atom's reactivity is determined by the number of electrons in its outermost shell.
• Less valence electron means high reactivity.

Valence electron in elements

• The junction between two nerve cells is known as the Synapse.
• The information is passed between two nerve cells through synapse in the form of chemical or electrical signals.
• At a synapse, the plasma membrane of the signal-passing neuron comes into the close with the membrane of the target cell.
• A synaptic connection between a neuron and a muscle cell is known as a neuromuscular junction.

We know,
ϕ = B Δ S cosθ
Here, cosθ is dimensionless
ΔS is the surface area of the surface placed in the magnetic field = [L²]
Bis the magnetic field = 
So, Dimensional formula of flux = 

Given line 2x – 3y = 6

We can write y = 2x/3 – 2

∵ Slope of line y = mx + c is equal to m,

⇒ Slope of line = 2/3

Considering other line ax – 9y = 1

We can write, y = a/9 – 1/9

⇒ Slope of line = a/9

∵ Slope of parallel lines is equal

⇒ a/9 = 2/3

⇒ a = 9 × 2/3

∴ a = 6

• Kidney Failure is a result of the excess of Phosphorus.
• It is important for the structure of DNA, a transporter of energy (ATP), a component of the cellular membrane, helps strengthen bones.
• Deficiency of Phosphorus can cause hypophosphatemia.

Given equation is 52 × 4 ÷ 2 + 6 × 10 ÷ 3 = 31

Let’s check each of the option,

1. Interchanging 4, 2 and ×, ÷

Equation will become, 52 ÷ 2 × 4 + 6 × 10 ÷ 3 = 124 ≠ 31

2. Interchanging 2, 6 and ÷, +

Equation will become, 52 × 4 + 6 ÷ 2 × 10 ÷ 3 = 218 ≠ 31

3. Interchanging 6, 3 and ×, +

Equation will become, 52 + 4 ÷ 2 + 3 × 10 ÷ 6 = 59 ≠ 31

4. Interchanging 10, 6 and ×, ÷

Equation will become, 52 ÷ 4 × 2 + 10 ÷ 6 × 3 = 31

Hence, by interchanging 10, 6 and ×, ÷ we get correct answer.

Here the fact-Education is important to lead a good life

Assumption-If primary education is not properly attained, base of an individual may not be strongly built.

From both the statements we can infer that education is the soul of one’s life. This is exactly what is told in option 4. Rest all options are also valid but cannot be logically inferred from the given statements.

Average of 6 boys = Sum of age of 6 boys/6

⇒ 14 = sum of ages of 6 boys/6

⇒ Sum of age of 6 boys = 84

Now,

Average of 11 girls = sum of age of 11 girls/11

⇒ 12 = sum of age of 11 girls/11

⇒ Sum of age of 11 girls = 132

Now,

Sum of age of all girls and boys together = 84 + 132 = 216

∴ Average = 216/17 = 12.7

• Osteomalacia is a disease caused due to the deficiency of Vitamin D.
• Arthritis is a disease caused due to the deficiency of Synovial Fluid.
• Gout is a disease caused due to the accumulation of Uric Acid.
• Pellagra is a disease caused due to deficiency of Vitamin B3

Given,