RRB NTPC Mock Test - 15 (English) - Railways MCQ

⇒ Area of parallelogram paper sheet = base × height = 50 × 18 = 900 cm²

Now,

⇒ Area of sheet cut for cylinder = Curved surface area of cylinder = 2π × base radius × height = 2 × (22/7) × (14/2) × 15 = 660 cm²

⇒ Area of remaining sheet = 900 – 660 = 240 cm²

Average of 15 numbers is 40

∴ Sum of these 15 numbers = 15 × 40 = 600

If two numbers 45 and 35 are removed

Sum of remaining 13 numbers = 600 - 45 - 35 = 520

∴ Average of these 13 numbers = 520/13 = 40

We observe the following pattern:

Hence using the same pattern for DANCER:

So, the answer is JFRFGS.

As ​the mouse is a device controlled using hands, the headset is a device for the ears.

Hence, option 2 is the correct answer.

Option 1: 27/51 = 9/17

Option 2: 63/119 = 9/17

Option 3: 153/289 = 9/17

Option 4: 108/221 ≠ 9/17

∴ 108/221 is NOT equal to 9/17.

• The South East Central Railway's (SECR) headquarters is located in Bilaspur.
• It is among the 17 Indian Rail zones.
• It was previously under the control of the South Eastern Railway.

The given options show how to compose and send a new message in Gmail.

4. Open your Gmail account.

1. Click on the compose button to create new message.

2. Press the maximize button on New message to expand the window.

3. Fill the From and To field.

5. Fill the Subject field.

6. Attach any files if needed and Click on Send.

Thus, 412356 is the correct order.

Admonish is the opposite of Praise. Therefore, we need to choose antonyms.

Tough : Crunchy

Clearly not antonyms

Attractive : Tempting

They are synonyms, not antonyms

Dull : Bright

Antonyms of each other.

Tame : Trained

They are synonyms, not antonyms

Hence, Dull : Bright is the correct answer.

A : B = 3 : 4

Let A = 3x and B = 4x

B : C = 4 : 5

Let B = 4x and C = 5x

A : B : C = 3x : 4x : 5x = 3 : 4 : 5

Two physical systems are in thermal equilibrium if there is no net flow of thermal energy between them when they are connected by a path permeable to heat. Thermal equilibrium obeys the zeroth law of thermodynamics. 

The average age of a family of 4 members in the year 2005 was 20

Since the age of the youngest member in 2005 is 0, the total age of all 5 members of the family in the year 2005 = 4 x 20 + 0 = 80

Total age of the family after 6 years will be = total age now + 5 x 6 = 80 + 30 = 110

Average age of the family then = 110/ 5= 22

A watermark is a logo or text superimposed on an image to help prevent an image from being copied or allow others to know where it was copied from and who owns the rights. Watermarks are often used on web pages so that the site's logo or banner is always visible in the background. A digital watermark is a kind of marker covertly embedded in a noise-tolerant signal such as an audio, video or image data. It is typically used to identify ownership of the copyright of such signal.

Total internal reflection is a phenomenon in optics in which a light ray reaching a medium boundary at greater than the critical angle is completely reflected in the same medium. An endoscope is an instrument used by doctors to examine the inside of the body. It consists of a bundle of optical fibres so as to transmit the image of organs around the corners.

‘wet’ is coded as ‘rah’ and ‘yellow’ is coded as ‘no’ and ‘car’ is coded as ‘ne’.

Hence, “wet yellow car” is coded as “rah no ne”.

Resolving Power:

• The ability of an optical instrument or type of film to separate or distinguish small or closely adjacent images
• Of the human eye with 20/20 vision is typically considered to be about “one arc minute” or “60 arc seconds”

Logic:

The first two digits of the number is the minimum number value among all the alphabetical values of the given alphabets.

The last two digits of the number is the maximum number value among all the alphabetical values of the given alphabets.

Minimum among 1, 12, 16, 8 and 1 is 1. Maximum among 1, 12, 16, 8 and 1 is 16.

So, ALPHA is written as 0116.

Similarly,

Minimum among 2, 5, 20 and 1 is 1. Maximum among 2, 5, 20 and 1 is 20.

So, BETA is written as 0120.

Hence, “0120” is the correct answer from the given alternatives.

⇒ One day work of A = (12 ft × 5 ft × 15 ft)/3 = 300 ft

⇒ One day work of B = (25 ft × 16 ft × 10 ft)/8 = 500 ft

∴ Ratio of efficiency = 300 ∶ 500 = 3 ∶ 5

• Water polo, consisting of 6 field players and 1 goal keeper and Kabaddi are the sports which have 7 players each in a team.
• On the other hand, basketball has 5 players in each side and Baseball has 9 players.

As the Indian National men’s cricket team is also known as “Men in Blue”, similarly the New Zealand National men’s cricket team is also known as “Black Caps”

Hence, “Black Caps” is the correct answer from the given alternatives.

Clearly, computer education can be started at the school level only if it is easy. So, I is implicit. In the statement, nothing is mentioned about the link between jobs and computer education. So, II is not implicit.

The rubbing face of the matchbox is has powered glass and a little red phosphorous. It is made after exposing white phosphorus to sunlight and is an allotrope of phosphorus. 

RTPROA → PARROT → a bird.

AIUGAN → IGUANA → a reptile.

OEDV → DOVE → a bird.

IPENGO → PIGEON → a bird.

Therefore, AIUGANis the odd one out.

• According to the 2011 census report released on 31 March 2011, the percentage of India's population in the total population of the world is 17.5%.
• During the time the population of our country increased from 1.03 billion (2001 census) to 1.21billion.
• Decadal growth of 17.64% was recorded by the census report.

• GK Trick :country wise  Descending order of population 

• Trick –– "CIA और IB  PAKISTAN  गये"

  • C –चीन C :- China

  • I –इंडिया I :- India

  • A –अमेरिका A :- America

  • I –इंडोनेशिया I :- Indonesia

  • B –ब्राजील B :- Brazil

  • Pakistan

Sublimation is a process in which the solid turns directly to gaseous state. One of the household examples is use of camphor and naphthalene balls.

• A Group of Ministers (GoM) on issues relating to the lottery was constituted by the GST Council on 10 January 2019.
• Sudhir Mungantiwar, Finance Minister, Government of Maharashtra was appointed as the convener of GoM.
• The GoM will decide if the disparity existing on tax rates on the lottery will continue or not.
• It will also see if there is a misuse of the lower tax rate on the lottery.

• “Sua” dance is related to Chhattisgarh and Madhya Pradesh.
• It is folk dance performed exclusively by the women.
• It is performed on the occasion of Goura marriage.
• It is also termed as ‘parrot dance’.

Echo refers to a reflection of sound from an obstacle that arrives at the listener with some delay after the original sound. It is not possible for the human ear to discriminate between direct sound and its echo if the delay is less than 1/10 s. Since the velocity of sound in dry air is 343 m/s, the reflecting object must be located more than 17.2 m from the source of sound for an echo to be distinctly heard.