Practice Question and Answer

Q:

The Prime Minister of England at the time of the Quit India Movement was?

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  • 1
    Chamberlain
    Correct
    Wrong
  • 2
    McDonald
    Correct
    Wrong
  • 3
    Churchill
    Correct
    Wrong
  • 4
    Clement Attlee
    Correct
    Wrong
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Answer : 3. "Churchill"
Explanation :

Mounting pressure from China and the United States, as well as from the Labour Party in Britain, led Prime Minister Winston Churchill to send Stafford Cripps to India to discuss the Draft Declaration, as settled by the War Cabinet and its Committee between 28 February to 9 March 1942, containing proposals to resolve ...


Q:

Which of the following hitting methods has the highest power factor?

1440 0

  • 1
    heating resistance
    Correct
    Wrong
  • 2
    induction heating
    Correct
    Wrong
  • 3
    Arc heating
    Correct
    Wrong
  • 4
    Dielectric heating
    Correct
    Wrong
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Answer : 1. "heating resistance"
Explanation :

The correct answer is Resistance Heating. Resistance heating is based on the I2R effect and is highly resistive in nature that's why it has the maximum power factor. Electric resistance heating is defined as “the heat produced by passing an electric current through a material that preferably has high resistance”.

Q:

Which football player has won the FIFA World Player Award (FIFA Ballon d’or) for four years in a row?

943 0

  • 1
    Andres Iniesta
    Correct
    Wrong
  • 2
    Christiane Ronaldo
    Correct
    Wrong
  • 3
    Lionel Mesai
    Correct
    Wrong
  • 4
    Michel Platini
    Correct
    Wrong
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Answer : 3. "Lionel Mesai "
Explanation :

The correct answer is Lionel Messi. Lionel Messi won the FIFA Ballon d'Or award for the fourth time in a row in January 2013. Messi's fourth award lifted him above three-time FIFA winners Zinedine Zidane of France and Brazil's Ronaldo.

Q:

If the population of a town is 12.000 and the population increases at the rate of 10% per annum, then find the population. after 3 years.

382 0

  • 1
    15,972
    Correct
    Wrong
  • 2
    12,200
    Correct
    Wrong
  • 3
    11,200
    Correct
    Wrong
  • 4
    10,200
    Correct
    Wrong
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Answer : 1. "15,972"
Explanation :

To find the population after 3 years given that it increases at a rate of 10% per annum, you can use the formula for exponential growth:

𝑃=𝑃0×(1+𝑟)𝑛P=P0×(1+r)n

Where:

  • 𝑃P = Population after 𝑛n years
  • 𝑃0P0 = Initial population
  • 𝑟r = Rate of increase (in decimal form)
  • 𝑛n = Number of years

Given:

  • 𝑃0=12,000P0=12,000 (Initial population)
  • 𝑟=0.10r=0.10 (10% increase per annum)
  • 𝑛=3n=3 (Number of years)

Substitute these values into the formula:

𝑃=12,000×(1+0.10)3P=12,000×(1+0.10)3

𝑃=12,000×(1.10)3P=12,000×(1.10)3

𝑃=12,000×(1.331)P=12,000×(1.331)

𝑃=15,972P=15,972

So, the population after 3 years would be approximately 15,972.


Q:

The price of sugar increases by 15%. By what percentage should the consumption of sugar be decreased so that the expenditure on the purchase of sugar remains the same? [Give your answer correct to 2 decimal places.]

364 0

  • 1
    11.11%
    Correct
    Wrong
  • 2
    12.5%
    Correct
    Wrong
  • 3
    14.16%
    Correct
    Wrong
  • 4
    13.04%
    Correct
    Wrong
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Answer : 4. "13.04%"
Explanation :

To solve this problem, let's denote:

  • Initial price of sugar = P
  • Initial quantity consumed = Q
  • Initial expenditure = PQ

After the price increases by 15%, the new price becomes 1.15P.

To keep the expenditure constant, the new quantity consumed (let's call it Q') can be calculated using the formula:

New expenditure = New price × New quantity

Setting the new expenditure equal to the initial expenditure:

PQ = (1.15P) * Q'

Now, solve for Q':

Q' = PQ / (1.15P)

Simplify:

Q' = Q / 1.15

Now, let's find the percentage decrease in consumption:

Percentage decrease = [(Q - Q') / Q] * 100

Substituting the value of Q':

Percentage decrease = [(Q - (Q / 1.15)) / Q] * 100

Percentage decrease = [(Q * (1 - 1/1.15)) / Q] * 100

Percentage decrease ≈ [(1 - 0.8696) * 100] ≈ 13.04%

Therefore, the consumption of sugar should be decreased by approximately 13.04% to keep the expenditure on the purchase of sugar the same after a 15% increase in price.

Q:

In an examination, 92% of the students passed and 480 students failed. If so, how many students appeared in the examination?

352 0

  • 1
    5800
    Correct
    Wrong
  • 2
    6200
    Correct
    Wrong
  • 3
    6000
    Correct
    Wrong
  • 4
    5000
    Correct
    Wrong
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Answer : 3. "6000"
Explanation :

Let's denote the total number of students who appeared in the examination as 𝑥x.

Given that 92% of the students passed, it means 8% failed because the total percentage is 100%.

We can set up the equation:

8% of 𝑥=4808% of x=480

To find 8% of 𝑥x, we multiply 𝑥x by 81001008 (which is the same as multiplying by 0.08):

0.08𝑥=4800.08x=480

Now, we can solve for 𝑥x:

𝑥=4800.08x=0.08480𝑥=6000x=6000

So, 6000 students appeared in the examination.


Q:

The sum of weights of A and B is 80 kg. 50% of A's weight is $${5\over6}$$ times the weight of B. Find the difference between their weights. 

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  • 1
    20 kg
    Correct
    Wrong
  • 2
    10 kg
    Correct
    Wrong
  • 3
    25 kg
    Correct
    Wrong
  • 4
    15 kg
    Correct
    Wrong
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Answer : 1. "20 kg"
Explanation :

Let's denote the weight of A as 𝑥x kg and the weight of B as 𝑦y kg.

Given:

  1. 𝑥+𝑦=80x+y=80 (Sum of weights of A and B is 80 kg)
  2. 0.5𝑥=56𝑦0.5x=65y (50% of A's weight is 5665 times the weight of B)

We can solve these two equations to find the values of 𝑥x and 𝑦y, and then calculate the difference between their weights.

From equation 2: 0.5𝑥=56𝑦0.5x=65y Multiply both sides by 2 to get rid of the fraction: 𝑥=56𝑦×2x=65y×2 𝑥=106𝑦x=610y 𝑥=53𝑦x=35y

Now substitute this expression for 𝑥x into equation 1: 53𝑦+𝑦=8035y+y=80 83𝑦=8038y=80 Multiply both sides by 3883: 𝑦=80×38y=80×83 𝑦=30y=30

Now that we have found the weight of B, we can find the weight of A using equation 1: 𝑥+30=80x+30=80 𝑥=80−30x=80−30 𝑥=50x=50

So, the weight of A is 50 kg and the weight of B is 30 kg.

Now, let's find the difference between their weights: Difference=Weight of A−Weight of BDifference=Weight of A−Weight of B Difference=50−30Difference=50−30 Difference=20Difference=20

Therefore, the difference between their weights is 20 kg.

Q:

Which of the following is not a seafood fish of India?

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  • 1
    Surmai
    Correct
    Wrong
  • 2
    Udanmin
    Correct
    Wrong
  • 3
    Echinoderms
    Correct
    Wrong
  • 4
    Hilsa
    Correct
    Wrong
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Answer : 3. "Echinoderms"
Explanation :

The option that is not a seafood fish of India is:

(C) Echinoderms

Explanation:

Echinoderms, such as sea cucumbers and starfish, are not fish. They belong to a different phylum (Echinodermata) and are not typically consumed as seafood fish.

On the other hand:

Surmai is a type of kingfish and is a seafood fish commonly found in Indian waters.

Udanmin appears to be a misspelling, and without clarification, it's not clear what specific fish it refers to.

Hilsa is a type of herring and is a well-known and widely consumed seafood fish in India.

Therefore, the correct answer to the question is (C) Echinoderms.

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