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RRB Group D Test 158
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RRB Group D Test 158
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  • Question 1/10
    1 / -0
    Which of the following is not an example of Simple harmonic oscillator?
    Solutions
    The following physical systems are some examples of simple harmonic oscillator.

    1. Mass on a spring

    2. Uniform circular motion

    3. Mass of a simple pendulum

    4. Scotch yoke


    Clearly, option (d) is the correct answer.
  • Question 2/10
    1 / -0
    The SI unit of acceleration is ___________.
    Solutions
    Acceleration, is the rate of change of velocity of an object with respect to time. An object's acceleration is the net result of any and all forces acting on the object, as described by Newton's Second Law.The SI unit for acceleration is metre per second squared (m s−2). Accelerations are vector quantities (they have magnitude and direction) and add according to the parallelogram law. As a vector, the calculated net force is equal to the product of the object's mass (a scalar quantity) and its acceleration.
  • Question 3/10
    1 / -0
    The outermost layer of the Sun is called
    Solutions
    The outer layer of sun’s atmosphere is made up of thin hot gases. It is called Corona. Corona is visible only during the total eclipse of the sun or with a special solar telescope called Coronagraph.
    Hence, option C is correct.
  • Question 4/10
    1 / -0
    The European Union has adopted which of the following as a common currency?
    Solutions
    • The Euro is the common currency of European Union.
    • It was introduced on 1stJanuary, 1999.
    • Originally, the Euro was an overarching currency.
    • It's the second most widely used currency in forex trading after the U.S. dollar.
    • It's also the second most widely held foreign exchange reserve used by central banks.
    • The Eurozone consists of 19 members who are European Union members and use the euro.
  • Question 5/10
    1 / -0
    Who translated Ramayana into Persian?
    Solutions
    Ramayan was translated into persian by Badauni in four years and in view of its importance,it was illustrated for AKBAR'S LIBRARY
  • Question 6/10
    1 / -0
    When were banks nationalised for the first time in India?
    Solutions
    The Government of India issued an ordinance and nationalised the 14 largest commercial banks with effect from the midnight of July19, 1969. The Second phase of nationalisation of 6 more banks followed in 1980.
  • Question 7/10
    1 / -0
    In the following question, select the odd letters from the given alternatives.
    Solutions
    https://www.topcoaching.in/paid/external-images/h9dJqjD6XtvSzkVDZy0VwHnm5t2lJo4KGJUIA4k1.png
    Thus, it is clear that VDZC is the odd letter group.

    Hence, option D is the correct answer.
  • Question 8/10
    1 / -0
    Which number will complete the series?
    63, 72, 81, 90, ____, 108
    Solutions
    63 + 9 = 72
    72 + 9 = 81
    81 + 9 = 90
    So, missing number = 90 + 9 = 99
    And also we know 99 + 9 =108.
  • Question 9/10
    1 / -0
    A tyre is used to turn the Giant wheel at a fair. Tyre is placed such that it touches the inside circumference of the Giant wheel. Radius of tyre is 14 cm and that of the Giant wheel is 10.75 m (outer) and 10.5 m (inner). How many turns does the tyre take for 1 turn of the wheel?
    Solutions
    Inside circumference of Giant wheel = 2π(10.5) (inner circumference since the
    tyre touches inside of Giant wheel)
    Circumference of tyre = 2π14 x 10-2 (measure in meters)
    No. of tyre turns for 1 Giant wheel turn = (2π x 10.5)/(2π x 14 x 10-2)
    = 75
  • Question 10/10
    1 / -0
    The ratio of two numbers is 3:4 and their H.C.F. is 48. Their L.C.M. is:
    Solutions

    Given, the ratio of two numbers is 3:4.

    Let the two numbers are 3x, 4x.

    And H.C.F. = x = 48

    Therefore, LCM = a × b × HCF

    Where a and b are the ratio of the numbers.

    ⇒ L.C.M. = 3 × 4 × 48

    ⇒ L.C.M. = 576

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