Technical Quiz Round 1

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| By Agrona15
A
Agrona15
Community Contributor
Quizzes Created: 2 | Total Attempts: 122
Questions: 20 | Attempts: 63

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Technical Quiz Round 1 - Quiz

AGRONA 2K15
INSTRUCTIONS:All the Questions are multiple choices. Each Questions carries 5 marks. Question once answered cannot be modified. Duration of the Test is 20 Minutes. DON'T CLOSE THE RESULT PAGE,IF CLOSED YOU WILL BE DISQUALIFIEDAFTER COMPLETION INFORM IMMEDIATELY TO THE CO-ORDINATORS
ALL THE BEST


Questions and Answers
  • 1. 

    For the purpose of the comparison the steam generating capacity of a boiler is generally expressed in the term of

    • A.

      Equivalent evaporation

    • B.

      Kg/hr

    • C.

      Steam pressure

    • D.

      Thermal efficiency

    Correct Answer
    A. Equivalent evaporation
    Explanation
    The steam generating capacity of a boiler is generally expressed in terms of equivalent evaporation, which is the amount of water that would be evaporated from and at 100°C into steam at atmospheric pressure in a given time period. This measurement allows for a standardized comparison of different boilers' capacities, regardless of their specific design or operating conditions.

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  • 2. 

    One of the following method is adopted for governing of steam turbine in a power plant 

    • A.

      Hit and miss governing

    • B.

      Blow off in boils

    • C.

      Throttle governing

    • D.

      Speed control

    Correct Answer
    C. Throttle governing
    Explanation
    Throttle governing is a method adopted for governing steam turbines in a power plant. This method involves controlling the flow of steam to the turbine by adjusting the position of the throttle valve. By regulating the steam flow, the speed of the turbine can be controlled, ensuring that it operates at a desired speed. Throttle governing is commonly used in power plants to maintain stable and efficient operation of steam turbines.

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  • 3. 

    An aircraft gas turbine operates on 

    • A.

      Sterling cycle

    • B.

      Bryton cycle

    • C.

      Rankin cycle

    • D.

      Otto cycle

    Correct Answer
    B. Bryton cycle
  • 4. 

    Which of the following is not used as a refrigerant 

    • A.

      Carbon monoxide

    • B.

      Ammonia

    • C.

      Sulphur dioxide

    • D.

      Carbon di-oxide

    Correct Answer
    A. Carbon monoxide
    Explanation
    Carbon monoxide is not used as a refrigerant because it is highly toxic and poses a significant health risk. Refrigerants are substances used in cooling systems to absorb heat and transfer it away from the desired area. Ammonia, sulfur dioxide, and carbon dioxide are commonly used as refrigerants due to their low toxicity levels and high heat absorption capacities. However, carbon monoxide is not suitable for this purpose due to its harmful effects on human health.

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  • 5. 

    A refrigerant used in the domestic refrigerant is 

    • A.

      Sulphur di- oxide

    • B.

      Air

    • C.

      Methane

    • D.

      Freon

    Correct Answer
    D. Freon
    Explanation
    Freon is a commonly used refrigerant in domestic refrigerators. It is a type of chlorofluorocarbon (CFC) which has high thermodynamic properties, making it an efficient coolant. It has low boiling point and easily evaporates to absorb heat from the surroundings, providing cooling effect. Freon is non-toxic and non-flammable, making it safe for household use. However, due to its harmful impact on the ozone layer, its production and use has been phased out in many countries in favor of more environmentally friendly alternatives.

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  • 6. 

    Draft on a pattern is provided for 

    • A.

      Facilitating pattern making

    • B.

      Easy lifting of casting

    • C.

      Facilitating with drawl of the pattern from the mould

    • D.

      Providing for shrinkage of casting

    Correct Answer
    D. Providing for shrinkage of casting
    Explanation
    The correct answer is "Providing for shrinkage of casting." When a casting is made, it tends to shrink as it cools and solidifies. Therefore, the pattern used to create the mold needs to be slightly larger than the desired final product to account for this shrinkage. This ensures that the final casting will have the correct dimensions. The other options listed do not directly relate to the need for shrinkage allowance in the pattern.

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  • 7. 

    Air fuel ratio in a jet engine is 

    • A.

      10:1

    • B.

      40:1

    • C.

      60:1

    • D.

      90:1

    Correct Answer
    C. 60:1
    Explanation
    The air fuel ratio in a jet engine is 60:1. This means that for every 60 units of air, 1 unit of fuel is used. This ratio is important for efficient combustion and optimal performance of the engine. A higher air fuel ratio indicates a lean mixture, which can result in better fuel efficiency but may also cause higher combustion temperatures. On the other hand, a lower air fuel ratio indicates a rich mixture, which can provide more power but may result in higher fuel consumption. Therefore, a ratio of 60:1 strikes a balance between fuel efficiency and engine performance.

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  • 8. 

    Tungsten is HSS imparts

    • A.

      Corrosion resistances

    • B.

      Red hardness

    • C.

      Ductility

    • D.

      Shock resistances

    Correct Answer
    B. Red hardness
    Explanation
    Tungsten imparts red hardness. Red hardness refers to the ability of a material to maintain its hardness at high temperatures. Tungsten has one of the highest melting points of all metals, making it extremely resistant to softening or losing its hardness when exposed to high heat. This property makes tungsten ideal for applications where materials need to withstand high temperatures, such as in cutting tools or high-speed machining operations.

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  • 9. 

    Select the proper sequences of the activities given (1) dispatching (2) Routing (3) schedules

    • A.

      (1)(2)(3)

    • B.

      (3)(2)(1)

    • C.

      1)(3)(2)

    • D.

      (3)(1)(2)

    Correct Answer
    B. (3)(2)(1)
    Explanation
    The correct sequence of activities is (3)(2)(1). This means that schedules should be created first, then routing should be determined, and finally dispatching should take place. This order ensures that the schedules are in place before determining the most efficient route, and then dispatching the necessary resources based on the established schedules and routes.

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  • 10. 

    Kerosene is used as coolant, which machining 

    • A.

      Mild steel

    • B.

      Cast iron

    • C.

      Stainless steel

    • D.

      Aluminum

    Correct Answer
    B. Cast iron
    Explanation
    Cast iron is the correct answer because it is a material commonly used in machining and requires a coolant to prevent overheating during the process. Kerosene is often used as a coolant in machining operations because it has good cooling properties and helps to lubricate the cutting tool. Mild steel, stainless steel, and aluminum are also commonly used in machining, but they do not typically require a coolant like cast iron does.

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  • 11. 

    ABC analysis deals with

    • A.

      Analysis of process chart

    • B.

      Flow of material

    • C.

      Ordering scheduled of job

    • D.

      Controlling inventory costs

    Correct Answer
    D. Controlling inventory costs
    Explanation
    ABC analysis is a technique used in inventory management to categorize items based on their importance and value. It involves dividing inventory into three categories: A, B, and C. Category A items are the most important and valuable, while category C items are the least important and valuable. By controlling inventory costs, businesses can prioritize their resources and focus on managing the inventory that has the highest impact on their overall costs and profitability. This analysis helps in optimizing inventory levels, reducing carrying costs, and improving overall efficiency.

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  • 12. 

    Bin cards are used in 

    • A.

      Machine loading

    • B.

      Fixing targets

    • C.

      Quality control

    • D.

      stores

    Correct Answer
    D. stores
    Explanation
    Bin cards are used in stores. Bin cards are a simple inventory management tool that helps keep track of the stock levels of items in a store. They are typically attached to the storage bins or shelves where the items are kept and provide information such as item description, quantity, and any other relevant details. By updating the bin cards whenever items are added or removed from the store, storekeepers can easily monitor the stock levels and ensure that they have enough inventory to meet customer demands.

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  • 13. 

    For comfort air conditions maintained are 

    • A.

      15deg dbt to 20deg wbt

    • B.

      25deg dbt to 60%RH

    • C.

      40deg dbt and 40deg wbt

    • D.

      25 deg dbt and 80%Rh

    Correct Answer
    B. 25deg dbt to 60%RH
    Explanation
    The correct answer is 25deg dbt to 60%RH. This range of temperature and relative humidity is considered comfortable for air conditions. It ensures that the air is not too hot or too cold, and the humidity level is within a comfortable range. This range provides a balance between keeping the air cool and preventing it from becoming too dry or too humid.

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  • 14. 

    The bed of machine tool is normally made of

    • A.

      C.I

    • B.

      Medium carbon steel

    • C.

      Alloy steel

    • D.

      Mild steel

    Correct Answer
    A. C.I
    Explanation
    The bed of a machine tool is typically made of C.I, which stands for cast iron. Cast iron is a popular choice for machine tool beds because it has excellent damping properties, meaning it can absorb vibrations and provide stability during machining operations. Additionally, cast iron has good wear resistance and thermal stability, making it suitable for heavy-duty applications.

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  • 15. 

    In a six cylinder 4 stroke petrol engines running at 2000rpm then the cam shaft runs of 

    • A.

      1000rpm

    • B.

      2000rpm

    • C.

      6000rpm

    • D.

      500rpm

    Correct Answer
    B. 2000rpm
    Explanation
    The cam shaft runs at the same speed as the engine's crankshaft in a 4 stroke engine. Since the engine is running at 2000rpm, the cam shaft will also be running at 2000rpm.

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  • 16. 

    Parson’s turbine is an example of 

    • A.

      Impulse turbine

    • B.

      Reaction turbine

    • C.

      Radial flow turbine

    • D.

      Water turbine

    Correct Answer
    B. Reaction turbine
    Explanation
    Parson's turbine is an example of a reaction turbine. This type of turbine operates by both the impulse and reaction principles. The turbine blades are designed to create a pressure difference as the steam passes through them, which generates both a force and a change in momentum. This combination of pressure and momentum results in the rotation of the turbine. The reaction turbine is commonly used in power plants and is known for its high efficiency and ability to handle large volumes of fluid.

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  • 17. 

    An example of water tube boiler is a 

    • A.

      Locomotive boiler

    • B.

      Lancashire boiler

    • C.

      Babcock-wilcox boiler

    • D.

      Cochran boiler

    Correct Answer
    C. Babcock-wilcox boiler
    Explanation
    The Babcock-wilcox boiler is an example of a water tube boiler. Water tube boilers have water-filled tubes that are heated externally by hot gases from the combustion process. In the Babcock-wilcox boiler, the water circulates through the tubes, which are surrounded by hot gases, allowing for efficient heat transfer and steam generation. This type of boiler is commonly used in power plants and industrial settings due to its ability to produce high-pressure steam.

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  • 18. 

     In which of the following place a super thermal power station is located at 

    • A.

      Nellore

    • B.

      Hyderabad

    • C.

      Vijayawada

    • D.

      Ramagundam

    Correct Answer
    D. Ramagundam
    Explanation
    A super thermal power station is located in Ramagundam.

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  • 19. 

    The output of a gas turbine is 3000kw and its efficiency is 20% the heat supplied is 

    • A.

      150kw

    • B.

      6000kw

    • C.

      600mw

    • D.

      15mw

    Correct Answer
    D. 15mw
    Explanation
    The output of a gas turbine is determined by multiplying the heat supplied with the efficiency. In this case, the efficiency is given as 20% (or 0.20) and the output is given as 3000kw. To find the heat supplied, we can rearrange the formula: heat supplied = output / efficiency. Substituting the given values, we get heat supplied = 3000kw / 0.20 = 15,000kw, which is equal to 15mw. Therefore, the correct answer is 15mw.

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  • 20. 

    Machinability of steel is improved by the presences of

    • A.

      Nickel

    • B.

      Tungsten

    • C.

      Sulphur

    • D.

      Chromium

    Correct Answer
    A. Nickel
    Explanation
    The presence of nickel in steel improves its machinability. Nickel increases the strength and toughness of steel, making it easier to cut and shape. It also enhances the ability of steel to withstand high temperatures and resist corrosion. Additionally, nickel improves the surface finish of steel, reducing the risk of tool wear and improving the overall machinability of the material.

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  • Current Version
  • Mar 16, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 22, 2015
    Quiz Created by
    Agrona15
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