Jet Engine Theory And Design

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| By Louis0737
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Questions: 39 | Attempts: 159

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Jet Engine Theory And Design - Quiz


Questions and Answers
  • 1. 

    WHICH OF THE FOLLOWING TYPES OF ENGINE DOES NOT USE ATMOSpHERIC AIR FOR COMBUSTION

    • A.

      ROCKET

    • B.

      PULSEJET

    • C.

      RAMJET

    Correct Answer
    A. ROCKET
    Explanation
    Rockets do not use atmospheric air for combustion because they carry their own oxidizer, usually in the form of liquid oxygen, which allows them to burn fuel in space where there is no air. Unlike pulsejets and ramjets, which rely on the intake of atmospheric air for combustion, rockets are self-contained and can operate in the vacuum of space.

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  • 2. 

    WHAT EFFECT DOES A DIVERGENT DUCT HAVE ON AIRFLOW

    • A.

      AN INCREASE IN PRESSURE AND DECREASE IN VELOCITY

    • B.

      AN INCREASE IN PRESSURE AND INCREASE IN VELOCITY

    • C.

      A DECRASE IN PRESSURE

    Correct Answer
    A. AN INCREASE IN PRESSURE AND DECREASE IN VELOCITY
    Explanation
    A divergent duct is designed to gradually increase the cross-sectional area of the airflow. As the airflow enters the divergent duct, the increase in area causes a decrease in velocity according to the principle of continuity. This decrease in velocity is accompanied by an increase in pressure, as stated by Bernoulli's principle. Therefore, the correct answer is that a divergent duct has the effect of increasing pressure and decreasing velocity of the airflow.

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  • 3. 

    DEFINITION OF FORCE ?

    • A.

      ACTION ON A BODY THAT CHANGES EITHER ITS MASS OR ITS WEIGHT

    • B.

      THE TOTAL AMOUNT OF WORK REQUIERED TO MOVE AN OBJET

    • C.

      ACTION ON A BODY THAT CHANGES ITS STATE OF MOTION

    Correct Answer
    C. ACTION ON A BODY THAT CHANGES ITS STATE OF MOTION
    Explanation
    The correct answer is "ACTION ON A BODY THAT CHANGES ITS STATE OF MOTION". This definition accurately describes force as a physical interaction that causes a change in the motion of an object. It implies that force can either start or stop the motion of an object, or change its direction or speed. This definition aligns with Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

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  • 4. 

    MAS IS THE QUANTITY OF MATTER, WEIGHT IS PULL OF GRAVITY ON THAT QUANTITY OF MATTER

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement is true because it accurately defines the terms "mass" and "weight". Mass refers to the quantity of matter an object contains, while weight is the force of gravity acting on that mass. Therefore, the statement correctly states that mass is the quantity of matter and weight is the pull of gravity on that quantity of matter.

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  • 5. 

    RATE OF DOING WORK

    Correct Answer
    POWER
    Explanation
    Power is the rate at which work is done or energy is transferred. It is a measure of how quickly a task can be completed or how much energy is used per unit time. Power is calculated by dividing the work done or energy transferred by the time taken. Therefore, power is the correct answer as it is directly related to the rate of doing work.

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  • 6. 

    ENGLISH MEASUREMENT FOR MECHANICAL POWER

    Correct Answer
    HORSEPOWER
    Explanation
    Horsepower is the correct answer as it is a unit of measurement used to quantify mechanical power. It is commonly used in the English measurement system to measure the power output of engines, particularly in the automotive and industrial sectors. The term "horsepower" originated from the work of James Watt, who compared the power output of steam engines to the work done by horses. It is still widely used today to describe the power of engines and motors.

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  • 7. 

    MEASURAMENT OF FORCE TIMES DISTANCE

    Correct Answer
    WORK
    Explanation
    Work is the measurement of force times distance. This means that in order to calculate the amount of work done, we need to multiply the force applied to an object by the distance over which the force is applied. Work is a scalar quantity and is measured in joules. It represents the energy transferred to or from an object by means of a force acting on it.

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  • 8. 

    CAPACITY FOR DOING WORK

    Correct Answer
    ENERGY
    Explanation
    Energy is the correct answer because it is the capacity for doing work. Energy is the ability to cause change or perform work, and it exists in various forms such as kinetic energy, potential energy, thermal energy, etc. It is the fundamental concept in physics that describes the ability of a system to do work or transfer heat. Therefore, energy aligns with the given description of "capacity for doing work."

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  • 9. 

    A STANDER DAY AT SEA LEVEL IS INDICATE BY

    • A.

      30.95 INCHES OF MERCURY, 0.00% HUMIDITY, AND A TEMPERATURE OF 59.0 DEGREE F

    • B.

      30.95, 25.-65

    • C.

      29.92 INCHES OF MERCURY, 0.00 % HUMIDITY AND A TEMPERATUR OF 59.0 D F

    Correct Answer
    C. 29.92 INCHES OF MERCURY, 0.00 % HUMIDITY AND A TEMPERATUR OF 59.0 D F
  • 10. 

    WHEN TEMP INCREASE IT THE SLUG OF AIR THE MOLECULES MOVE FASTER, RUN INTO EACH OTHER WITH MORE IMPACT AND MOVE FUTHER APART DECREASING AIR DENSITY

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    When the temperature increases, the kinetic energy of air molecules also increases. This causes the molecules to move faster and collide with each other more frequently and with greater force. As a result, the air molecules spread out further apart, leading to a decrease in air density. Therefore, the statement is true.

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  • 11. 

    WHAT IS THE RAM EFFECT

    • A.

      MORE AIR ARRIVING THE ENGINE

    • B.

      MORE AIR ARRIVING THE ENGINE INTAKE THAN THE ENGIEN CAN INGEST

    • C.

      THE AIRSPEED AT WICH RAM PRESSURE DECREASE EQUAL FRICTION

    Correct Answer
    B. MORE AIR ARRIVING THE ENGINE INTAKE THAN THE ENGIEN CAN INGEST
    Explanation
    The RAM effect refers to the situation where more air is entering the engine intake than the engine can actually ingest. This can occur when the aircraft is flying at high speeds, causing a buildup of air pressure in front of the intake. The excess air can result in increased engine performance and power output.

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  • 12. 

    WORK

    • A.

      NEWTONS 1ERS LAW

    • B.

      NEWTONS 2D LAW

    • C.

      NEWTONS 3ER LAW

    Correct Answer
    A. NEWTONS 1ERS LAW
    Explanation
    Newton's 1st Law states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction, unless acted upon by an external force. This law explains the concept of inertia, where objects tend to resist changes in their state of motion. It implies that if there is no net force acting on an object, it will either remain at rest or continue moving in a straight line at a constant velocity.

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  • 13. 

    ACTION/ REACTION

    • A.

      NEWTONS 1ERS LAW

    • B.

      NEWTONS 2D LAW

    • C.

      NEWTONS 3RS LAW

    Correct Answer
    C. NEWTONS 3RS LAW
    Explanation
    Newton's 3rd Law states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on another object, the second object exerts a force of equal magnitude but in the opposite direction on the first object. In other words, any force exerted on an object will result in a force of equal strength but in the opposite direction on the object that exerted the initial force. This law explains the concept of interaction between objects and is fundamental in understanding the principles of motion and force.

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  • 14. 

    ACELL/ ERATION

    • A.

      NEWTONS 1ERS LAW

    • B.

      NEWTONS 2D LAW

    • C.

      NEWTONS 3ERS LAW

    Correct Answer
    B. NEWTONS 2D LAW
    Explanation
    The correct answer is "NEWTONS 2D LAW" because Newton's second law of motion states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. This law explains how the motion of an object changes when a force is applied to it, and it is commonly expressed as F = ma, where F is the net force, m is the mass of the object, and a is the acceleration.

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  • 15. 

    WHAT ARE THE THREE PARTS OF MIL-STD-879 ENGINE DESIGNATION SYSTEM

    • A.

      TYPE INDICATOR , MANUFACTOR SYMBOL, AND MODEL INDICATOR

    • B.

      TYPE INDICATOR , MANUFACTOR SYMBOL, SERVICE INDENTIFIFIER

    • C.

      TYPE INDICATOR , MANUFACTOR SYMBOL, AND TYPE INDICATOR

    Correct Answer
    A. TYPE INDICATOR , MANUFACTOR SYMBOL, AND MODEL INDICATOR
    Explanation
    The three parts of the MIL-STD-879 engine designation system are the type indicator, manufacturer symbol, and model indicator. The type indicator specifies the type or category of the engine, such as whether it is a reciprocating engine or a turbine engine. The manufacturer symbol identifies the specific manufacturer of the engine. The model indicator indicates the specific model or version of the engine. These three parts together provide a standardized way to designate and identify different engines according to their type, manufacturer, and model.

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  • 16. 

    WHICH OF THE FOLLOWING IS A REASON FOR PROPER AIR ENTRANCE DUCT DESIGN

    • A.

      TO INCREASE RAM RECOVERY WHILE REDUCING PRESSURE DROPS

    • B.

      TO REDUCE THE RATIO OF COMPRESSOR DISCHARGE PRESSURE TO DUCT INLET PRESSURE

    Correct Answer
    A. TO INCREASE RAM RECOVERY WHILE REDUCING PRESSURE DROPS
    Explanation
    Proper air entrance duct design is important to increase ram recovery while reducing pressure drops. Ram recovery refers to the ability of an aircraft to recover and utilize the kinetic energy of the incoming air. By designing the air entrance duct properly, the aircraft can effectively capture and utilize the kinetic energy, resulting in increased ram recovery. Additionally, reducing pressure drops in the duct helps to maintain a smooth and efficient airflow, allowing for optimal performance and fuel efficiency.

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  • 17. 

    A SINGLE AIR ENTRANCE IS MORE ADVANTAGEOUS THAN DUAL AIR ENTRANCE SYSTEM FOR WICH OF THE FOLLOWING  REASONS

    • A.

      IT EASIER FOR AIRCRAFT TO MANUFACTURE

    • B.

      IT OBTAINS MAXIMUN RAM PRESSURE

    Correct Answer
    B. IT OBTAINS MAXIMUN RAM PRESSURE
    Explanation
    A single air entrance is more advantageous than a dual air entrance system because it allows the aircraft to obtain maximum ram pressure. This means that the air entering the aircraft is at its highest possible pressure, which is important for various functions such as engine performance and aerodynamic efficiency. Having a single air entrance simplifies the design and manufacturing process of the aircraft, making it easier to produce. However, the main advantage mentioned in the question is the ability to obtain maximum ram pressure.

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  • 18. 

    DURING SUPERSONIC FLIGHT WHAT MAJOR AIRCRAFT COMPONENT CAN NOT WITHTAND SUPERSONIC VELOCITY AIRFLOW

    • A.

      THE TAIL

    • B.

      THE ENGINE

    • C.

      THE INTAKE

    Correct Answer
    B. THE ENGINE
    Explanation
    During supersonic flight, the major aircraft component that cannot withstand supersonic velocity airflow is the engine. Supersonic airflow creates extreme conditions of temperature and pressure, which can cause damage to the engine components. The high-speed airflow can lead to overheating, structural deformation, and failure of engine parts. Therefore, engines need to be specifically designed and equipped with materials and cooling systems that can handle the intense conditions of supersonic flight.

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  • 19. 

    IN AN AXIAL-FLOW ENGINE, BY WHAT MEANS IS HIGH-VELOCITY , LOW PRESSURE AIR CONVERTED TO LOW-VELOCITY, HIGH PRESSURE AIR

    • A.

      ACTION OF SINGLE INTAKE DIFFUSER

    • B.

      ACTION OF STATOR BLADES AT EACH STAGE OF COMPRESSION

    Correct Answer
    B. ACTION OF STATOR BLADES AT EACH STAGE OF COMPRESSION
    Explanation
    In an axial-flow engine, high-velocity, low-pressure air is converted to low-velocity, high-pressure air through the action of stator blades at each stage of compression. Stator blades are stationary blades that are placed between rotating blades (rotor blades) in the compressor section of the engine. As the high-velocity air passes through the stator blades, it is redirected and its velocity is reduced. This redirection and reduction in velocity cause an increase in pressure, resulting in the conversion of high-velocity, low-pressure air into low-velocity, high-pressure air.

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  • 20. 

    WHAT IS THE MOST SERIOUS DISADVANTAGE OF AXIAL-FLOW COMPRESSOR

    • A.

      LOW COMPRESSION RATIO

    • B.

      HIGH STARTING POWER NEEDS

    • C.

      HIGH TENDENCY TO STALL

    Correct Answer
    C. HIGH TENDENCY TO STALL
    Explanation
    The most serious disadvantage of an axial-flow compressor is its high tendency to stall. Stalling occurs when the airflow through the compressor becomes disrupted, leading to a loss of efficiency and potentially causing damage to the compressor blades. This can result in a decrease in overall engine performance and reliability. Stalling is particularly problematic in axial-flow compressors due to their design, which relies on a delicate balance of airflow and pressure. Therefore, the high tendency to stall is a significant drawback of axial-flow compressors.

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  • 21. 

    WITCH REFERENCE TO AXIAL-FLOW ENGINE THE ANGLE OF ATTACK IS THE ANGLE AT WICH THE AIRFLOW

    • A.

      STRIKES THE ROTOR BLADES

    • B.

      BECOMES TURBULANT OVER THE UPPER FOIL SURFACE

    Correct Answer
    B. BECOMES TURBULANT OVER THE UPPER FOIL SURFACE
    Explanation
    The angle of attack is the angle at which the airflow strikes the rotor blades. At this angle, the airflow becomes turbulent over the upper foil surface.

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  • 22. 

    WHAT THREE ENGINE OPERATING PARAMETER CAUSE THE AIRFLOW  ANGLE OF ATTACT TO VARY

    • A.

      ENGINE RPM, HUMIDITY AND COMPRESSOR DISCHARGE PRESSURE

    • B.

      ENGINE, RPM, COMPRESSOR-INLER TEMP AND COMPRESSOR DISCHARGE PRESSURE

    Correct Answer
    B. ENGINE, RPM, COMPRESSOR-INLER TEMP AND COMPRESSOR DISCHARGE PRESSURE
  • 23. 

    ENGINE CHOKING REFER TO WHICH OF THE FOLLOWING TERMS

    • A.

      HIGH COMPRESSOR INLET AIR TEMP

    • B.

      STALL DUE TO AN EXCESS VOLUME OF AIR IN THE REAR OF COMPRESSOR

    Correct Answer
    B. STALL DUE TO AN EXCESS VOLUME OF AIR IN THE REAR OF COMPRESSOR
    Explanation
    The correct answer is "STALL DUE TO AN EXCESS VOLUME OF AIR IN THE REAR OF COMPRESSOR." Engine choking refers to a condition where the airflow through the engine is disrupted, leading to a loss of power or stall. In this case, the excess volume of air in the rear of the compressor causes a disruption in the airflow, leading to engine choking. This can occur due to various reasons such as a malfunctioning compressor or a blockage in the air intake system.

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  • 24. 

    WHICH OF THE FOLLOWING IS NOT CONSIDER BY ENGINE MANUFACTURES AS CORRECTIVE ACTION FOR A FRONT END, LOW SPEED. HIGH TEMP STALL

    • A.

      INSTALLING A BLEED VALVE IN THE MIDDLE OF REAR PORTION OF THE COMPRESSOR SECTION

    • B.

      INCREASING COMPRESSOR LOAD THROUGH THE USE OF VARIABLE-AREA EXHAUST NOZZLES

    Correct Answer
    B. INCREASING COMPRESSOR LOAD THROUGH THE USE OF VARIABLE-AREA EXHAUST NOZZLES
    Explanation
    Increasing compressor load through the use of variable-area exhaust nozzles is not considered by engine manufacturers as a corrective action for a front-end, low-speed, high-temp stall. This is because increasing the compressor load can potentially exacerbate the stall condition and lead to further damage to the engine. Installing a bleed valve in the middle of the rear portion of the compressor section is a common corrective action to alleviate the stall condition by reducing the compressor load.

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  • 25. 

    GIUDES VANE CHANGE THE DIRECTION OF THE AIR ENTERING AND LEAVING THE COMPRESSOR IN WHAT MANER

    • A.

      BY SWIRLING IT AS IT ENTERS AND LEAVES

    • B.

      BY SWIRLING IT AS IT ENTERS AND STRAIGHTENING IT OUT AS IT LEAVES

    Correct Answer
    B. BY SWIRLING IT AS IT ENTERS AND STRAIGHTENING IT OUT AS IT LEAVES
    Explanation
    The correct answer is "BY SWIRLING IT AS IT ENTERS AND STRAIGHTENING IT OUT AS IT LEAVES". This means that the vanes in the compressor guide the air in a swirling motion as it enters the compressor, and then straighten it out as it leaves. This swirling motion helps to improve the efficiency and performance of the compressor.

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  • 26. 

    BLEED AIR FOR UNLOADING THE COMPRESSOR DURING STARTING , COCKPIT PRESSURIZATION AND HEATING, ENGINE ANTI-ICING, FUEL TANK , PRESSURIZATION AND VARIOUS OTHER PURPOSES IS TAPPED FROM WHICH OF THE FOLLOWING SOURCE

    • A.

      THE COMPRESSOR FOR LOW PRESSURE AND TEM NEEDS ONLY

    • B.

      DIFFERENT STAGES OF THE COMPRESSOR DEPENDING ON THE PRESSURE AND TEMP NEEDED

    Correct Answer
    B. DIFFERENT STAGES OF THE COMPRESSOR DEPENDING ON THE PRESSURE AND TEMP NEEDED
    Explanation
    Bleed air for various purposes is tapped from different stages of the compressor depending on the pressure and temperature needed. This means that the specific stage of the compressor is selected based on the requirements of the system that needs the bleed air. The compressor has multiple stages, each operating at different pressures and temperatures, allowing for the extraction of air at the desired conditions for different purposes such as cockpit pressurization, heating, engine anti-icing, and fuel tank pressurization.

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  • 27. 

    WHAT ARE TWO COMMON FORM OF BLADE ROOTS

    • A.

      GRUB AND BULB

    • B.

      FIR-TREE AND BULB

    Correct Answer
    B. FIR-TREE AND BULB
    Explanation
    The correct answer is FIR-TREE AND BULB. These are two common forms of blade roots used in various applications. The fir-tree root is shaped like a fir tree, with multiple protrusions that fit into corresponding slots in the rotor disc. This design provides good stability and resistance to centrifugal forces. The bulb root, on the other hand, is a rounded shape that allows for easy installation and removal of the blade. It provides a secure fit and helps in distributing the load evenly. Both forms of blade roots have their advantages and are commonly used in different types of blades.

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  • 28. 

    WHAT IS THE PROFILE OF COMPRESSOR BLADE

    • A.

      THE LENGTH OF THE BLADE

    • B.

      A CUTOUT THAT REDUCES BLADE THICKNESS

    Correct Answer
    B. A CUTOUT THAT REDUCES BLADE THICKNESS
    Explanation
    The profile of a compressor blade refers to its shape and design. In this case, the correct answer is "A cutout that reduces blade thickness." This means that the compressor blade has a specific cutout or indentation that is designed to reduce its thickness. This cutout helps to improve the aerodynamic performance of the blade and optimize its efficiency in compressing air. By reducing the blade thickness, the cutout allows for better airflow and reduces the chances of turbulence or drag, ultimately enhancing the overall performance of the compressor.

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  • 29. 

    WHAT IS THE PURPOSE OF COMPRESSOR BLADE PROFILES

    • A.

      TO ALLOW LESS AIRFLOW TO ESCAPE AROUND THE EDGE OF THE TIP

    • B.

      TO ALLOW THE COMPRESSOR BLADE TIPS TO RUB WITHOUT CAUSING SERIOUS DAMAGE

    Correct Answer
    B. TO ALLOW THE COMPRESSOR BLADE TIPS TO RUB WITHOUT CAUSING SERIOUS DAMAGE
    Explanation
    The purpose of compressor blade profiles is to allow the compressor blade tips to rub without causing serious damage. This means that the profiles are designed in a way that allows for a small amount of contact between the blade tips and the surrounding components, such as the casing, without causing significant wear or damage. This is important because the tips of the compressor blades can experience rubbing during operation due to factors like thermal expansion or manufacturing tolerances. By having specific blade profiles, the rubbing can be minimized and the overall performance and durability of the compressor can be improved.

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  • 30. 

    WHICH OF THE FOLLOWING IS A DISADVANTAGE OF THE AXIA-FLOW COMPRESSOR

    • A.

      HIGH STARTING POWER NEEDS

    • B.

      LOU PEAK EFFICIENCIES

    Correct Answer
    A. HIGH STARTING POWER NEEDS
    Explanation
    The disadvantage of the Axia-Flow compressor is that it requires high starting power needs. This means that it requires a significant amount of power to start and operate, which can be a disadvantage in terms of energy consumption and cost.

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  • 31. 

    WHICH OF THE FOLLOWING TYPES OF COMPRESSOR PROVIDES GREATER STARTING FLEXIBILITY AND IMPROVED HIGH-ALTITUDE PERFORMANCE

    • A.

      SPLIT-SPOOL. AXIAL-FLOW

    • B.

      SOLID-SPOOL, AXIAL-FLOW

    Correct Answer
    B. SOLID-SPOOL, AXIAL-FLOW
    Explanation
    The solid-spool, axial-flow compressor provides greater starting flexibility and improved high-altitude performance. This type of compressor is designed with a solid rotor, or spool, that rotates within a stationary casing. It is known for its efficient airflow and ability to handle varying operating conditions, making it ideal for applications where starting flexibility and high-altitude performance are important. The solid-spool design allows for better control of the airflow, resulting in improved performance at high altitudes.

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  • 32. 

    WHAT IS THE PRIMARY FUNCTION OF THE COMBUSTION SECTION

    • A.

      TO PROVIDE IGNITION

    • B.

      TO BURN THE FUEL-AIR MIXTURE

    Correct Answer
    B. TO BURN THE FUEL-AIR MIXTURE
    Explanation
    The primary function of the combustion section is to burn the fuel-air mixture. This is where the fuel and air are mixed together and ignited to produce combustion, which generates the necessary heat and energy to power the engine.

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  • 33. 

    APPROXIMATELY WHAT % OF AIR ENTERING THE COMBUSTION CHAMBER IS MIXED WITH FUEL FOR COMBUSTION

    • A.

      40 %

    • B.

      35%

    • C.

      25%

    Correct Answer
    C. 25%
    Explanation
    Approximately 25% of air entering the combustion chamber is mixed with fuel for combustion. This means that a smaller portion of air is combined with the fuel to facilitate the combustion process. The remaining percentage of air is likely used for other purposes such as cooling or dilution.

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  • 34. 

    APPROXIMATELY WHAT % OF AIR ENTERING THE COMBUSTION CHAMBER SERVES AS FLAME CONTROL

    • A.

      80

    • B.

      75

    • C.

      65

    Correct Answer
    B. 75
    Explanation
    Approximately 75% of the air entering the combustion chamber serves as flame control. This means that a significant portion of the air is used to regulate and maintain the flame during the combustion process. By controlling the amount of air, the flame can be adjusted to achieve optimal combustion efficiency and ensure proper fuel combustion.

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  • 35. 

    DURING THE COMBUSTION PROCESS, THE EMISSION LEVEL OF WHITCH OF THE FOLLOWING POLLUTANT INCREASES AS TEMP INCREASES

    • A.

      CARBON MONOXID

    • B.

      CARBON DIOXIDE

    • C.

      NITRIC OXIDE

    Correct Answer
    C. NITRIC OXIDE
    Explanation
    During the combustion process, the emission level of nitric oxide increases as the temperature increases. This is because at higher temperatures, the nitrogen and oxygen molecules in the air react more vigorously, leading to the formation of more nitric oxide. Nitric oxide is a harmful pollutant that contributes to air pollution and can have negative effects on human health and the environment.

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  • 36. 

    WHICH OF THE FOLLOWING IS NOT A BASIC ELEMENT OR SYSTEM OF COMBUSTION CHAMBER

    • A.

      CASING

    • B.

      INNER LINER

    • C.

      AIR POLLUTION EMISION REDUCTION

    Correct Answer
    C. AIR POLLUTION EMISION REDUCTION
    Explanation
    Air pollution emission reduction is not a basic element or system of a combustion chamber. A combustion chamber is primarily composed of a casing and an inner liner. The casing provides structural support and contains the combustion process, while the inner liner helps to protect the casing from the high temperatures generated during combustion. Air pollution emission reduction, on the other hand, is a separate concern that involves implementing technologies and strategies to minimize the release of pollutants into the atmosphere. While important, it is not directly related to the basic elements or systems of a combustion chamber.

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  • 37. 

    WHICH OF THE FOLLOWING IS NOT A BASIC TYPE OF COMBUSTION CHAMBER

    • A.

      ANNULAR

    • B.

      CAN-ANNULAR

    • C.

      BASKET-CHAMBER

    Correct Answer
    C. BASKET-CHAMBER
    Explanation
    The given answer, "BASKET-CHAMBER," is not a basic type of combustion chamber. The other two options, "ANNULAR" and "CAN-ANNULAR," are commonly used types of combustion chambers in gas turbines. An annular combustion chamber consists of a ring-shaped design, while a can-annular combustion chamber consists of multiple individual combustion cans arranged in a circular pattern. However, a "basket-chamber" is not a recognized or commonly used type of combustion chamber in the field of gas turbines.

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  • 38. 

    PRESENTLY, WHAT TOTAL NUMBER OF COMBUSTION LINER ARE USED IN JET ENGINE USING CAN-TYPE COMBUSTION CHAMBER

    • A.

      2 OR 4

    • B.

      6 OR 7

    • C.

      8 OR 10

    Correct Answer
    C. 8 OR 10
    Explanation
    The correct answer is 8 OR 10. The question asks about the total number of combustion liners used in a jet engine with a can-type combustion chamber. The answer 8 OR 10 suggests that there can be either 8 or 10 combustion liners used in such an engine. The exact number may vary depending on the specific design and model of the engine.

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  • 39. 

    WHICH OF THE FOLLOWING TYPES OF FUEL NOZZLES ARE USED IN JET ENGINES

    • A.

      INTERNAL AND EXTERNAL

    • B.

      SIMPLEX AND DUPLEX

    Correct Answer
    B. SIMPLEX AND DUPLEX
    Explanation
    Jet engines use both simplex and duplex fuel nozzles. Simplex fuel nozzles have a single fuel spray pattern, while duplex fuel nozzles have multiple fuel spray patterns. The choice between simplex and duplex fuel nozzles depends on the specific requirements of the jet engine and the desired fuel distribution. Simplex fuel nozzles are commonly used in smaller jet engines, while duplex fuel nozzles are used in larger engines to achieve better fuel atomization and more efficient combustion.

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  • Apr 16, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 22, 2010
    Quiz Created by
    Louis0737
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