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Objective Questions

Latest NMDC MCO Exam Question (Objective Questions), MCQ in English

Subjects : Mechanical, General Knowledge, Numerical & Reasoning Ability

Question Bank NMDC MCO Grade-III (Trainee) Exam - English
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Mechanical

Question 1Single Answer
A fin will be more effective when Bio number is
  1. A
    Greater than 1
  2. B
    Equal to 1
  3. C
    Between 1 and 3
                   4        4
  4. D
    Less than 1
Question 2Single Answer
A tank of length, breadth and height in the ratio of 2:1:2 is full of water. The ratio of hydrostatic force at the bottom to that at any larger vertical surface is
  1. A
    1
  2. B
    2
  3. C
    3
  4. D
    4
Question 3Single Answer
Which of the following fluids exhibit a certain shear stress at zero shear strain rate followed by a straight line relationship between shear stress and shear strain rate?
  1. A
    Newtonian fluid 
  2. B
    Ideal Bingham plastic fluids
  3. C
    Pseudo-plastic fluids
  4. D
    Dilatent fluids
Question 4Single Answer
What is the specific gravity of a marble stone, which weighs 400N in air, and 200N in water? (g=10m/s2)
  1. A
    8
  2. B
    6
  3. C
    4
  4. D
    2
Question 5Single Answer
What is the intensity of pressure in the following SI units, when specific gravity of mercury is 13.6 and the intensity of pressure is 400KPa ?
  1. A
    0.3 bar or 4.077m of water or 0.29 mm of Hg
  2. B
    4 bar or 5.077m of water or 0.399 mm of Hg
  3. C
    0.3 bar or 5.077m of water or 0.599 mm of Hg
  4. D
    4 bar or 4.077m of water or 0.299 mm of Hg
Question 6Single Answer
Consider the following statements:
1.If a small upward displacement is given to a floating body, it results in the reduction of the buoyant force acting on the body
2.A slight horizontal displacement does not change either the magnitude or the location of the buoyant force 
Which of the above statements is/are correct? 
  1. A
    Both 1 and 2
  2. B
    1 only 
  3. C
    2 only
  4. D
    Neither 1 nor 2 
Question 7Single Answer
State whether following flow field is physically possible? 
  1. A
    Possible for steady, incompressible flow
  2. B
    Possible for unsteady, incompressible flow
  3. C
    Possible for steady, compressible flow 
  4. D
    Not Possible 
Question 8Single Answer
In a differential manometer, a head of 0.5 m of fluid A in limb 1 is found to balance a head of 0.3 m of fluid B in limb 2. The atmospheric pressure is 760 mm of mercury. The ratio of specific gravities of A to B is
  1. A
    0.25
  2. B
    0.26
  3. C
    2
  4. D
    4
Question 9Single Answer
A Reversed Carnot Engine removes 50 kW from a heat sink. The temperature of the heat sink is 250 K and the temperature of the heat reservoir is 300 K. The power required of the engine is
  1. A
    10 kW 
  2. B
    20 kW
  3. C
    30 kW
  4. D
    50 kW
Question 10Single Answer
On which of the following just in time manufacturing philosophy emphasizes ?
  1. A
    man power
  2. B
    profit
  3. C
    inventory
  4. D
    manufacturing
Question 11Single Answer
If a submerged body displaced from its equilibrium position, returns to its original position, it is called __________.
  1. A
    thermal equilibrium
  2. B
    neutral equilibrium
  3. C
    unstable equilibrium
  4. D
    stable equilibrium
Question 12Single Answer
In a flow measurement, a venturi meter is preferred over an orifice plate because _____.
  1. A
    energy of head loss is less
  2. B
    It is cheaper
  3. C
    pressure drop is more
  4. D
    space is limited  
Question 13Single Answer
Pitot tube measures ______.
  1. A
    dynamic pressure of a moving stream
  2. B
    guage pressure
  3. C
    temperature of moving water
  4. D
    pressure difference between two fluids
Question 14Single Answer
Which of the following is not a property of an ideal fluid ?
  1. A
    flow is irrotational
  2. B
    it has no viscosity
  3. C
    it has viscosity
  4. D
    it is incompressible
Question 15Single Answer
Nozzle used in steam turbines convert ________.
  1. A
    enthalpy of steam into work
  2. B
    enthalpy of steam into kinetic energy
  3. C
    enthalpy of steam into pressure energy
  4. D
    pressure energy into work
Question 16Single Answer
Which of the following assumptions is the most relevant in air-standard cycle analysis ?
  1. A
    All the processes within the cycle are irreversible
  2. B
    Working fluid is a fixed mass
  3. C
    Specific heat of air changes during the cycle
  4. D
    Cycle is assumed to be an open cycle
Question 17Single Answer
The modern Francis turbine is a ___________flow turbine .
  1. A
    tangential 
  2. B
    axial
  3. C
    radial
  4. D
    mixed
Question 18Single Answer
Variation of stress with strain rate for a Newtonian fluid is ______ .
  1. A
    hyperbolic
  2. B
    linear
  3. C
    elliptical
  4. D
    parabolic
Question 19Single Answer
Which of the following is NOT a part of refrigeration systems ?
  1. A
    Turbine
  2. B
    Evaporator
  3. C
    Compressor
  4. D
    Condenser
Question 20Single Answer
Which of the following is NOT an intensive property ?
  1. A
    Temperature
  2. B
    Total volume
  3. C
    Pressure
  4. D
    Density
Question 21Single Answer
What is the primary use of a spud wrench?
  1. A
    Tightening bolts
  2. B
    Aligning holes in structural steel
  3. C
    Cutting metal
  4. D
    Measuring angles
Question 22Single Answer
Which power tool is best suited for cutting curves in wood?
  1. A
    Drill
  2. B
    Grinder
  3. C
    Jigsaw
  4. D
    Impact wrench
Question 23Single Answer
What is the function of a torque wrench?
  1. A
    Cutting threads
  2. B
    Applying a specific torque to a fastener
  3. C
    Drilling holes
  4. D
    Sanding surfaces
Question 24Single Answer
Which tool is used to remove material from a workpiece by abrasion?
  1. A
    File
  2. B
    Hammer
  3. C
    Pliers
  4. D
    Screwdriver
Question 25Single Answer
What is the purpose of a center punch?
  1. A
    To tighten screws
  2. B
    To mark a spot for drilling
  3. C
    To cut metal sheets
  4. D
    To measure depth
Question 26Single Answer
Which power tool is commonly used for grinding and sharpening?
  1. A
    Angle grinder
  2. B
    Circular saw
  3. C
    Drill
  4. D
    Router
Question 27Single Answer
What is the main use of a pipe wrench?
  1. A
    Cutting pipes
  2. B
    Turning and gripping pipes
  3. C
    Measuring pipe diameter
  4. D
    Bending pipes
Question 28Single Answer
Which tool is used to check the flatness of a surface?
  1. A
    Straight edge
  2. B
    Caliper
  3. C
    Protractor
  4. D
    Tap
Question 29Single Answer
What does a countersink tool do?
  1. A
    Drills holes
  2. B
    Creates a conical recess for screw heads
  3. C
    Cuts threads
  4. D
    Measures angles
Question 30Single Answer
Which power tool is ideal for driving screws quickly?
  1. A
    Impact driver
  2. B
    Jigsaw
  3. C
    Grinder
  4. D
    Router

General Knowledge

Question 31Single Answer
Which Windows interface element typically appears to display information, a warning, an error message, or a request for confirmation?
  1. A
    Window
  2. B
    Pop-up menu
  3. C
    Message box
  4. D
    Taskbar
Question 32Single Answer
What is active desktop ?
  1. A
    a term that is synonymous with viewing your desktop as web page
  2. B
    a feature to customize your desktop to display informating you can update from the internet
  3. C
    both a and b above mentioned
  4. D
    A software
  5. E
    None of these
Question 33Single Answer
What is meant by an active window?
  1. A
    A window that is minimized
  2. B
    The window currently receiving user input
  3. C
    Any window currently open
  4. D
    The window opened first
Question 34Single Answer
What was America Online (AOL) primarily known for during the early popularization of consumer Internet access?
  1. A
    An online service providing Internet access and proprietary online content
  2. B
    A computer operating system
  3. C
    A spreadsheet application
  4. D
    A database management system
Question 35Single Answer
An application is
  1. A
    word processing, accounting and engineering programs are example of application programs
  2. B
    computer program designed to enable users to perform specific job functions
  3. C
    Both a and b above mentioned
  4. D
    a document
  5. E
    None of these
Question 36Single Answer
Which of the following programs enables you to calculate numbers related to rows and columns?
  1. A
    Window program
  2. B
    Spreadsheet program
  3. C
    Graphics program
  4. D
    Word program
  5. E
    None of these
Question 37Single Answer
The term Briefcase is used for
  1. A
    a special folder on the windows desktop used to keep documents up to date when shared between computers
  2. B
    a window that us currently open
  3. C
    A folder which keeps deleted, files for a while and can be retrieved from it
  4. D
    All of the above
  5. E
    None of these
Question 38Single Answer
In a graphical user interface, what is a button primarily used for?
  1. A
    Executing a command or initiating an action
  2. B
    Permanently storing data
  3. C
    Displaying the computer's IP address
  4. D
    Formatting a disk automatically
Question 39Single Answer
A channel (in windows terminology) is
  1. A
    a widely used online service that offers access to the internet
  2. B
    a specialized web site designed to work with the windows 98 subscribing feature to automatically download information from the internet and store it on your computer for later viewing
  3. C
    an area on the computer memory where text or graphics can be temporarily stored
  4. D
    All of the above
  5. E
    None of these
Question 40Single Answer
What does a checked checkbox generally indicate in a graphical user interface?
  1. A
    The associated option is enabled or selected
  2. B
    The application has closed
  3. C
    The file has been deleted
  4. D
    The computer is offline
Question 41Single Answer
Yojna a weekly journal
  1. A
    Ministry of Finance        
  2. B
    Ministry of Information and Broadcastin
  3. C
    Ministry of Rural Development
  4. D
    Planning Commission
Question 42Single Answer
Kurukshetra a journal on rural development is published by
  1. A
    Ministry of Finance 
  2. B
    Ministry of Information and Broadcastin
  3. C
    Ministry of Rural Development
  4. D
    Planning Commission
Question 43Single Answer
Devaluation of a currency means
  1. A
    Fixing the value of the currency in conjuction with the movement in the value of a basket of predetermined currencies
  2. B
    Reduction in the value of a currency vis-à-vis major internationally traded currencies
  3. C
    Fixing the value of currency in multilateral consultaion with the IMF the World Bank and major trading partners
  4. D
    Permitting the currency to seek its worth in the international market
Question 44Single Answer
In India rural incomes are generally lower than the urban incomes, which of the following reasons account for this
            1. a large number of farmers are illiterate and know little about scientific agriculture
            2. prices of primary products are lower than those of manufactured products
            3. Investments in agriculture has been low when compared to investment in industry
  1. A
    1 and 3
  2. B
    2 and 3
  3. C
    1 and 2
  4. D
    1,2 and 3
Question 45Single Answer
Which of the following programmes aims at the promotion of savings among rural women
  1. A
    Rashtriya Mahila Kosh
  2. B
    Indira Mahila Yojna
  3. C
    Jawahar Rozgar Yojna
  4. D
    Mahila Samridhi Yojna
Question 46Single Answer
What is Net National Product
  1. A
    the money value of final goods and services produced annually in the economy
  2. B
    the money value of annual service generation in the economy
  3. C
    the money value of tangible goods produced annually in the economy
  4. D
    The money value of tangible goods available in the economy
Question 47Single Answer
National income is the 
  1. A
    net national product at market price
  2. B
    net national product at factor cost
  3. C
    net domestic product at market price
  4. D
    net domestic product at factor cost
Question 48Single Answer
Chelliah Committee of 1992 deals with the overhauling of our
  1. A
    financial system            
  2. B
    tax system
  3. C
    patents and copyrights  
  4. D
    Public sector undertakings
Question 49Single Answer
During which Five Year Plan was the annual growth rate of National Income the lowest
  1. A
    2nd plan
  2. B
    3rd plan
  3. C
    5th plan
  4. D
    6th plan
Question 50Single Answer
Which of the following taxes is a progressive tax
  1. A
    sales tax           
  2. B
    custom tax
  3. C
    excise tax         
  4. D
    income tax
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