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RRB Technician (Grade-I) 2025 Mix Test - 19
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RRB Technician (Grade-I) 2025 Mix Test - 19
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  • Question 1/10
    1 / -0.33

    A 1500 W electric geyser is used every day for 2 hrs. Calculate the energy consumed?

    Solutions

    Correct answer:03 kWh

    Explanation (exam-oriented):

    • Power of the geyser = 1500 W = 1.5 kW

    • Time used per day = 2 hours

    Energy consumed per day

    Hence, the energy consumed is: 03 kWh (per day)

  • Question 2/10
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    A circle is inscribed in a ΔABC having sides AB = 16 cm, BC = 20 cm and AC = 24 cm, and side AB, BC and AC touches circle at D, E and F, respectively.

    The measure of AD is:

    Solutions

    Correct answer:10 cm

    Solution (exam-oriented):

    In a triangle with an incircle, the tangents drawn from the same vertex to the points of contact are equal.

    Let the triangle be ΔABC with:

  • Question 3/10
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    In a survey of students, the percentage of those who like Horror movies is 40%, Action movies is 45%, and Comedy movies is 50%. The percentage of students who like both Horror and Action movies is 15%, both Action and Comedy movies is 20%, and both Horror and Comedy movies is 10%. If 5% of the students like none of these three types of movies, what percentage of students like all three types of movies?

    Solutions

    Correct answer:5%

    Explanation (step-by-step):

    Let

    • Horror (H) = 40%

    • Action (A) = 45%

    • Comedy (C) = 50%

    Given overlaps:

    • H ∩ A = 15%

    • A ∩ C = 20%

    • H ∩ C = 10%

    Also given:

    • None like any movie type = 5%

    So,

    Percentage of students who like all three types of movies = 5%

  • Question 4/10
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    Which of the following types of transducers does not require an external power source?

    Solutions

    Piezoelectric transducers generate their own voltage and do not require an external power source, which classifies them as self-generating or active transducers.

  • Question 5/10
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    Which of the following software utilities is primarily designed to reduce the size of files and folders, often by creating archive files in formats like .zip or .7z, to facilitate more efficient storage and transmission?

    Solutions

    Correct answer:WinZip

    Explanation (exam-oriented):

    • WinZip is a file compression utility used to reduce the size of files and folders by creating archive files such as .zip (and similar formats).

    • This helps in efficient storage and faster transmission of data.

    Why others are incorrect?

    • Winamp → Media player

    • Microsoft Word → Word processing software

    • Windows Defender → Antivirus and security utility

    Hence, the correct answer is: WinZip

  • Question 6/10
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    The gauge factor of a typical resistance strain gauge is usually in the range of

    Solutions

    The gauge factor, also known as the sensitivity factor, of a typical strain gauge is usually around 1.5 to 2.0, which indicates the change in electrical resistance per unit of mechanical strain.

  • Question 7/10
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    In the question below, from the given alternatives select the word which cannot be formed using the letters of the given word.

    UNCONSTITUTIONAL

    Solutions

    Correct answer:INSTITUTION

    Explanation (exam-oriented):

    Given word: UNCONSTITUTIONAL

    Now check the formation of each option by comparing letter availability and frequency.

    • CONSULTATION → Can be formed using the letters

    • CONNOTATION → Can be formed using the letters

    • CONSUL → Can be formed using the letters

    • INSTITUTION → ❌ Cannot be formed

    Reason:

    The word INSTITUTION requires the letter ‘I’ twice, but UNCONSTITUTIONAL contains only one ‘I’. Hence, it cannot be formed.

    Therefore, the word that cannot be formed is: INSTITUTION

  • Question 8/10
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    Solutions

    Correct answer:0.25

    Explanation (step-by-step):

    Given:

  • Question 9/10
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    An object's surface acquires a net charge of +9.6×10−19 C. Which of the following statements accurately describes the change in the number of electrons on the object?

    Solutions

    Correct answer:6 electrons are removed from the surface of the object

    Explanation (step-by-step):

    • Net charge acquired by the object =

    • A positive charge means the object has lost electrons (since electrons are negatively charged).

    Therefore, 6 electrons must be removed from the surface of the object.

    Correct option: 6 electrons are removed from the surface of the object

  • Question 10/10
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    In a 8085 microprocessor system with memory mapped I/O

    Solutions

    Correct answer:Arithmetic and logic operations can be directly performed with I/O data

    Explanation (8085 – Memory Mapped I/O):

    In a memory-mapped I/O system, I/O devices are treated like memory locations.

    Let’s check each statement:

    1️⃣ I/O devices have 8-bit address

    • In memory-mapped I/O, devices use the same address space as memory (16-bit address), not 8-bit.

    2️⃣ I/O devices are accessed using IN and OUT instructions

    • IN/OUT instructions are used in I/O-mapped I/O, not memory-mapped I/O.

    • Memory-mapped I/O uses instructions like MOV, LDA, STA, etc.

    3️⃣ There can be maximum 256 input and 256 output devices

    • This limit applies to I/O-mapped I/O, not memory-mapped I/O.

    • In memory-mapped I/O, the number of devices depends on available memory address space.

    4️⃣ Arithmetic and logic operations can be directly performed with I/O data

    • Since I/O data is treated as memory data, ALU operations can be directly performed.

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