

InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
1. |
An airliner with take-off gross weight of 2100kg is cruising with fuel weight fraction of 0.280. Then, what will be the weight of fuel (Wf)?(a) 588kg(b) 588lb(c) 90kg(d) 28lbI got this question during an interview for a job.The doubt is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» Correct answer is (a) 588KG |
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2. |
According to FAA, general aviation aircraft requires reserved fuel in terms of _____(a) additional cruise fuel of half hour(b) additional climb fuel(c) no provision is mentioned in FAA(d) additional taxi-way fuel of three hoursI got this question at a job interview.Origin of the question is Conceptual Sketch Sizing topic in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct answer is (a) ADDITIONAL cruise fuel of half hour |
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3. |
Avionics systems are an example of ____ weight.(a) empty(b) crew(c) passenger(d) payloadThe question was posed to me in a job interview.My query is from Conceptual Sketch Sizing topic in division Conceptual Sketch Sizing of Aircraft Design |
Answer» The CORRECT ANSWER is (a) EMPTY |
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4. |
What will be the weight fraction of the aircraft at final mission segment w.r.t. W0?(a) Multiplication of individual weight fraction(b) Division of individual weight fraction(c) Addition of individual weight fraction(d) Subtraction of individual weight fractionThis question was posed to me in an interview.The origin of the question is Conceptual Sketch Sizing in division Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct option is (a) Multiplication of individual weight fraction |
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5. |
Mission leg fuel fraction is defined by _____(a) weight at end of the phase to that of at the begin(b) weight at end of the phase to that of at the begin(c) weight of phase at the begin(d) weight at end of the phaseI had been asked this question in an interview.I want to ask this question from Conceptual Sketch Sizing in division Conceptual Sketch Sizing of Aircraft Design |
Answer» Correct choice is (a) WEIGHT at end of the phase to that of at the begin |
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6. |
The “Design take-off gross weight” and “maximum take-off weight” are always interchangeable.(a) True(b) FalseThis question was posed to me in an international level competition.This key question is from Conceptual Sketch Sizing topic in section Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct choice is (b) False |
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7. |
Total fuel weight of aircraft is ______(a) mission fuel only(b) sum of mission fuel, reserve fuel and trapped fuel(c) sum of trapped and mission fuel(d) reserved fuel onlyI had been asked this question in an international level competition.This interesting question is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The CORRECT ANSWER is (b) sum of MISSION fuel, reserve fuel and trapped fuel |
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8. |
Which of the following is the correct pair?(a) Empty weight fraction is similar to gross weight of the aircraft(b) Empty weight fraction is inversely proportion to gross weight of the aircraft(c) Empty weight fraction is directly proportion to gross weight of the aircraft(d) Empty weight fraction is not related with the gross weight of the aircraftThe question was asked during an interview for a job.The above asked question is from Conceptual Sketch Sizing in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» The CORRECT choice is (B) Empty weight fraction is INVERSELY proportion to GROSS weight of the aircraft |
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9. |
A Jet transport aircraft is flying with crew load of 175kg, payload of 1400kg and fuel weight of 500kg. Find out Fuel to empty weight fraction, if design take-off gross weight of the aircraft is 5600lb.(a) 1.076(b) 0.1831(c) 0.196(d) 0.1418I got this question during an interview.Question is from Conceptual Sketch Sizing topic in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct answer is (a) 1.076 |
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10. |
A prop-driven aircraft having fuel weight of 650kg. Now, aircraft is taxing on runway, after which it has fuel fraction of 0.975. Determine fuel used during taxing of aircraft, if W0 = 5000kg.(a) 225kg(b) 125kg(c) 221kg(d) 125.65lbThe question was posed to me by my college professor while I was bunking the class.This intriguing question comes from Conceptual Sketch Sizing in division Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct answer is (b) 125kg |
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11. |
What is the typical range for empty weight fraction?(a) 0.3-0.7(b) 0.1-0.125(c) 0.14-0.28(d) 0.25-0.27This question was addressed to me during an interview.Question is taken from Conceptual Sketch Sizing in section Conceptual Sketch Sizing of Aircraft Design |
Answer» CORRECT answer is (a) 0.3-0.7 To EXPLAIN: Empty weight fraction has typical RANGE from 0.3-0.7 according to historical guidelines. HIGHER empty weight fraction indicates more weight. The range given is based on typical guideline and HENCE in some cases it can go beyond 0.7 as well. |
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12. |
Is it mandatory for Aircraft to carry reserved fuel?(a) Yes(b) No(c) Depends upon the type of aircraft(d) Depends upon manufactureThe question was asked in an interview for internship.I'm obligated to ask this question of Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» Correct answer is (a) Yes |
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13. |
A jet aircraft is cruising at 12000ft. What will be the cruise leg (mission phase ‘n’) weight fraction?(a) Wn/Wn-1 = \(e^{\left(-\frac{R*C}{V*\frac{L}{D}}\right)}\)(b) Wn/Wn+1 = \(e^{\left(-\frac{R*C}{V*\frac{L}{D}}\right)}\)(c) Wn/Wn-2 = \(e^{\left(-\frac{R*C}{V*\frac{L}{D}}\right)}\)(d) Wn/Wn-1 = \(e^{\left(-\frac{R*C}{V*\frac{L}{D}}\right)}\)This question was addressed to me in an international level competition.Enquiry is from Conceptual Sketch Sizing in section Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct answer is (a) Wn/Wn-1 = \(e^{\LEFT(-\FRAC{R*C}{V*\frac{L}{D}}\right)}\) |
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14. |
How will you determine climb mission weight fraction?(a) Climb Endurance(b) Loiter(c) Always constant(d) Cruise SpeedThe question was asked in examination.Origin of the question is Conceptual Sketch Sizing topic in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» Correct choice is (a) Climb Endurance |
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15. |
An aircraft has Crew and payload of 180kg. It has empty weight fraction of 0.48 and fuel weight is 0.7 times empty weight. What will be the gross weight of aircraft?(a) 2157lb(b) 215kg(c) 950kg(d) 1000lbThe question was asked by my college director while I was bunking the class.Enquiry is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct answer is (a) 2157lb |
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16. |
A jet transport aircraft has fuel storage of 1200kg. It has completed taxi phase and preparing for take-off. At the end of the taxing, it has fuel fraction of 0.98. Determine how much fuel is available after taxing. Given take-off gross weight is 9000kg.(a) 1020kg(b) 180kg(c) 1800kg(d) 2240lbThis question was posed to me by my college professor while I was bunking the class.My question is from Conceptual Sketch Sizing topic in section Conceptual Sketch Sizing of Aircraft Design |
Answer» Correct choice is (a) 1020kg |
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17. |
Take-off gross weight of an aircraft is summation of _____(a) empty and payload weight(b) fuel, payload, crew, empty and miscellaneous weight(c) fuel and crew weight(d) only passenger and crew weightThe question was posed to me by my school principal while I was bunking the class.This intriguing question originated from Conceptual Sketch Sizing in section Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct choice is (a) empty and payload weight |
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18. |
A military Aircraft should be designed to have ______(a) lowest possible empty weight fraction(b) highest possible empty weight fraction(c) empty weight fraction higher than 0.89(d) empty weight fraction unityThis question was addressed to me by my school teacher while I was bunking the class.My enquiry is from Conceptual Sketch Sizing in division Conceptual Sketch Sizing of Aircraft Design |
Answer» The CORRECT choice is (a) lowest possible EMPTY weight fraction |
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19. |
What is the first step to estimate the gross weight W0?(a) To find crew and payload weight so initial W0 can be guess(b) To find proper lofting(c) Drafting(d) Directly finding take-off distanceI have been asked this question by my school teacher while I was bunking the class.Query is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» Correct answer is (a) To find crew and PAYLOAD WEIGHT so initial W0 can be guess |
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20. |
Total take-off gross weight depends on _____(a) fuel consumption only(b) only on aerodynamic efficiency(c) fuel, crew, payload and empty weight(d) independentThe question was posed to me during an interview.My question is from Conceptual Sketch Sizing in section Conceptual Sketch Sizing of Aircraft Design |
Answer» The CORRECT answer is (c) FUEL, crew, payload and EMPTY weight |
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21. |
An aircraft with crew and payload of 180kg is flying. If fuel weight fraction is 0.353 and empty weight fraction 0.481 then, what will be the gross weight of aircraft?(a) 2391kg(b) 2391lb(c) 1000kg(d) 1000lbI got this question in an interview for job.This key question is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» CORRECT choice is (B) 2391lb Easiest explanation: Given crew and PAYLOAD = 180kg, Fuel weight fraction Wf / W0 = 0.353, EMPTY weight fraction We / W0 = 0.481 Gross weight of aircraft is, W0 = Wcrew + Wpayload + WFUEL + Wempty By re-arranging, W0 = Wcrew + Wpayload / [1 – (Wf / W0) – (We / W0)] = 180 / [1-0.353-0.481] = 1084.33 kg = 2390.96lb |
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22. |
A general aviation aircraft is flying with crew load of 115lb, payload of 220lb and fuel weight of 100lb. Find out the design take-off gross weight of the aircraft, given 95lb empty weight.(a) 530lb(b) 241lb(c) 435lb(d) 500lbI got this question in semester exam.Query is from Conceptual Sketch Sizing topic in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The CORRECT choice is (a) 530lb |
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23. |
Which of the following is part of the fuel-fraction method?(a) Developing lofting(b) Empty weight fraction(c) Calculating individual mission segment weight fraction(d) Finding volume ratioI got this question in final exam.The above asked question is from Conceptual Sketch Sizing topic in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» Right option is (c) Calculating INDIVIDUAL mission segment weight fraction |
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24. |
Which of the following is true?(a) Lowest possible empty weight fraction in practice is zero(b) F-35 aircraft has the highest possible empty weight fraction(c) Empty weight fraction will be different for different type of aircrafts(d) Empty weight fraction is always same for each aircraftI have been asked this question in examination.My query is from Conceptual Sketch Sizing topic in division Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct answer is (c) Empty weight fraction will be different for different type of aircrafts |
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25. |
Cessna 172R has total gross weight of the 1110.98kg with fuel capacity of 210 kg and weight of crew and passenger is 125kg. Find out empty weight fraction.(a) 775.98kg(b) 69.84kg(c) 0.6984(d) 0.6984lbI got this question by my school teacher while I was bunking the class.The origin of the question is Conceptual Sketch Sizing in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» Right answer is (c) 0.6984 |
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26. |
The typical method for determining fuel weight used is called as _____(a) fuel-fraction method(b) fuel-invert method(c) fuel interpolation(d) fuel fraction miningThe question was asked during an online interview.I'm obligated to ask this question of Conceptual Sketch Sizing in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» Right answer is (a) fuel-fraction METHOD |
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27. |
Which of the following pair is correct based on the empty weight fraction?(a) Flying boat-0.77, Jet trainer-0.65(b) Flying boat-0.65, Jet trainer-0.77(c) Flying boat-0.45, Jet trainer-0.65(d) Flying boat-0.3, Jet trainer-1.0I have been asked this question in homework.My question is based upon Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct choice is (a) Flying boat-0.77, Jet trainer-0.65 |
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28. |
The design take-off gross weight of aircraft is given by _____(a) W0 = Wcrew + Wpayload + Wfuel – Wempty(b) W0 = Wcrew + Wpayload – Wfuel – Wempty(c) W0 = Wcrew + Wpayload + Wfuel * Wempty(d) W0 = Wcrew + Wpayload + Wfuel + WemptyThis question was addressed to me by my college professor while I was bunking the class.Asked question is from Conceptual Sketch Sizing topic in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» Right CHOICE is (d) W0 = Wcrew + Wpayload + Wfuel + Wempty |
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29. |
Design take-off gross weight includes ______(a) only fuel weight(b) only crew weight(c) only payload weight(d) crew, payload and fuel weightsI got this question by my college professor while I was bunking the class.Question is taken from Conceptual Sketch Sizing topic in division Conceptual Sketch Sizing of Aircraft Design |
Answer» Right CHOICE is (d) crew, payload and FUEL weights |
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30. |
Choose the correct statement based on fuel weight.(a) Fuel required is solely based on mission profile(b) Fuel weight is independent of SFC of engine(c) The required amount of the fuel for mission depends on aerodynamics, SFC, mission itself etc(d) Fuel requirement is not affected by any factorsThe question was asked during an interview for a job.I'd like to ask this question from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct choice is (c) The required amount of the fuel for mission depends on aerodynamics, SFC, mission itself ETC |
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31. |
Aircraft fuel weight does not include reserved fuel fraction.(a) True(b) FalseI got this question in final exam.This intriguing question originated from Conceptual Sketch Sizing topic in division Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct choice is (b) False |
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32. |
An aircraft has cruise range of 1500NM and SFC C = 0.5 1/hr. Cruise velocity of jet aircraft is 570ft/s with L/D as 13.2. Aircraft is supposed to do loiter of 2 hrs then what should be the gross weight of aircraft? Given, empty weight fraction of 0.55, crew and payload OF 6500kg with 0.98 as mission segment fuel fraction for climb, take-off and landing.(a) 37000 kg(b) 37.8 ton(c) 37880lb(d) 3780 kgI had been asked this question during a job interview.This interesting question is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct answer is (b) 37.8 ton |
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33. |
The subsequent step after the requirements in conceptual design phase is _____(a) design take-off gross weight(b) control(c) stability(d) loftingThis question was addressed to me in an online quiz.Enquiry is from Conceptual Sketch Sizing in section Conceptual Sketch Sizing of Aircraft Design |
Answer» Right option is (a) design take-off GROSS weight |
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34. |
In A/C, we provide reserve fuel for _____(a) loiter maneuver(b) weight reduction(c) to increase weight(d) there is no provision for itI had been asked this question in a job interview.I would like to ask this question from Conceptual Sketch Sizing topic in division Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct answer is (a) loiter maneuver |
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35. |
Choose appropriate option for cruise mission leg weight fraction.(a) Breguet endurance formula(b) Breguet range formula(c) Cruise invert method(d) Breguet approximationI had been asked this question at a job interview.This is a very interesting question from Conceptual Sketch Sizing in division Conceptual Sketch Sizing of Aircraft Design |
Answer» Right option is (b) BREGUET range formula |
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36. |
Which of the following is correct?(a) Fuel weight fraction is based on mission profile only(b) Take-off gross weight is sum of all possible weight of aircraft(c) Empty weight fraction is always 0.55(d) Crew load is always half of payloadThis question was addressed to me in examination.The doubt is from Conceptual Sketch Sizing topic in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» Right answer is (b) Take-off gross weight is sum of all possible weight of aircraft |
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37. |
For given mission leg ‘n’, mission leg weight fraction is _____(a) Wn / Wn-1(b) Wn / Wn-2(c) Wn-1 / Wn+1(d) Wn / Wn+1The question was posed to me in semester exam.This key question is from Conceptual Sketch Sizing in division Conceptual Sketch Sizing of Aircraft Design |
Answer» The CORRECT option is (a) WN / Wn-1 |
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38. |
What will be the total fuel weight fraction for x-number of mission phases?(a) Wf / W0 = 1 – (Wx / W0)(b) Wf / W0 = 1 + (Wx / W0)(c) Wf / W0 = 1 / (Wx / W0)(d) Wf / W0 = 1 + (Wx / W0)The question was posed to me in semester exam.My enquiry is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» Right option is (a) WF / W0 = 1 – (Wx / W0) |
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39. |
Keeping all other factors constant if only range of aircraft is increased then, what will be effect on the gross weight of aircraft?(a) Gross weight will increase(b) Will decrease(c) Unchanged(d) Not depended on rangeThe question was posed to me in an interview.My query is from Conceptual Sketch Sizing topic in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» CORRECT choice is (a) Gross weight will INCREASE The EXPLANATION is: Cruise range will directly affect the fuel fraction of the aircraft. If range is INCREASED then the fuel weight will ALSO increase. Hence, as per W0 = Wcrew + Wpayload + Wfuel + Wempty gross weight will increase. |
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40. |
If all the other factors remain unchanged and only aerodynamic efficiency of the aircraft is doubled then, what will be the cruise segment fuel weight fraction?(a) Will increase(b) Will decrease(c) Will remain same(d) Will be independent of aerodynamic efficiencyI had been asked this question by my school principal while I was bunking the class.This is a very interesting question from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct option is (a) Will increase |
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41. |
A prop-driven aircraft is cruising with 90% propeller efficiency. If, range of aircraft is 7*10^6 ft, C=1.38*10^-7 s^-1 and L/D = 14 then what will be the fuel weight fraction for the cruise?(a) 0.9216(b) 0.9261(c) 0.9289(d) 0.9365The question was asked by my college professor while I was bunking the class.My doubt stems from Conceptual Sketch Sizing topic in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» Correct choice is (b) 0.9261 |
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42. |
Estimation of take-off weight is an iterative method.(a) True(b) FalseThe question was asked in an online interview.The query is from Conceptual Sketch Sizing topic in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» RIGHT option is (a) True The explanation is: Take-off GROSS WEIGHT estimation is an ITERATIVE PROCESS. Here, we guess the take-off gross weight. According to which we calculate the actual weight. This is a step by step method. |
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43. |
What is the working principle of ‘fuel-fraction’ method?(a) Division of mission profile into number of phases and finding individual phase fuel fraction(b) Division of mission profile into 3 phases only(c) Calculating fuel fraction for each stage(d) Assuming any value for fuel fractionThis question was addressed to me in an interview for internship.My question is taken from Conceptual Sketch Sizing in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» Correct answer is (a) Division of mission profile into NUMBER of phases and FINDING INDIVIDUAL phase fuel fraction |
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44. |
An Aircraft has gross weight of 10000lb. At the end of the mission segment it has weight fraction as 0.985. Determine fuel consumed for this mission.(a) 150lb(b) 150kg(c) 60kg(d) 60lbThe question was asked in an online interview.This intriguing question originated from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct choice is (a) 150lb |
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45. |
What does the following diagram represents?(a) Simple cruise mission profile(b) Accelerated cruise(c) Bomber mission(d) Penetration strikeThe question was asked in semester exam.This intriguing question comes from Conceptual Sketch Sizing topic in division Conceptual Sketch Sizing of Aircraft Design |
Answer» The correct CHOICE is (a) Simple cruise MISSION profile |
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46. |
Following diagram is showing mission profile with different phases with mission segment fuel fraction as shown. If crew weight is 150kg, payload of 600kg and empty fraction of 0.495. Determine gross weight of the aircraft.(a) 4430kg(b) 39810kg(c) 4431lb(d) 38910lbThe question was asked during an interview for a job.I need to ask this question from Conceptual Sketch Sizing topic in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» CORRECT choice is (a) 4430kg Easy explanation: Given crew WEIGHT = 150kg, payload weight = 600kg Fuel weight fraction Wf / W0 = 1.06[1 – Wx/W0], Now from fuel fraction method, Wx / W0 = MULTIPLICATION of each phase fraction = 0.975*0.98*0.96*0.8*0.96*0.97 = 0.6833 Now, Wf / W0 = 1.06 * [1 – (Wx / W0)] = 0.3357 Empty weight fraction We / W0 = 0.481 Gross weight of aircraft is, W0 = Wcrew + Wpayload + Wfuel + Wempty By re-arranging, W0 = Wcrew + Wpayload / [1 – (Wf/ W0) – (We / W0)] = 150 + 600 / [1-0.3357-0.495] = 4430kg |
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47. |
Which of the following is part of take-off weight estimation?(a) Lofting(b) Drafting(c) Initial guess of take-off gross weight based on mission specifications(d) Manufacturing part is first stepI had been asked this question during an internship interview.This key question is from Conceptual Sketch Sizing topic in division Conceptual Sketch Sizing of Aircraft Design |
Answer» Right choice is (c) Initial guess of take-off gross weight based on mission specifications |
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48. |
A jet airliner aircraft is flying with crew load of 150kg, payload of 520lb and fuel weight of 500lb. Find out the empty weight if design take-off gross weight of the aircraft is given 1525lb.(a) 79kg(b) 79lb(c) 170lb(d) 355lbI got this question during a job interview.My doubt is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» Right answer is (a) 79kg |
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49. |
Initial guess of gross weight will be same for every aircraft.(a) True(b) FalseI have been asked this question during an interview for a job.The above asked question is from Conceptual Sketch Sizing topic in chapter Conceptual Sketch Sizing of Aircraft Design |
Answer» RIGHT option is (b) False The best explanation: Initial GUESS of aircraft partially BASED on crew and payload weight. Crew and payload weight will be based on specification of PARTICULAR aircraft. HENCE, initial guess is not same for each aircraft. |
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50. |
The empty weight fraction of a jet transport with fixed sweep is given by ______(a) 1.02*(Wo^-0.06)*1.0(b) 1.5*(Wo^-0.16)*1.0(c) 1.09*(Wo^-0.06)*1.12(d) 1.02*(Wo^-0.06)*1.04This question was posed to me in a national level competition.My question comes from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design |
Answer» Right option is (a) 1.02*(Wo^-0.06)*1.0 |
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