Technical Questions Flashcards by James Ross

At what rate dose temperature decrease with with Altitude.

a) -2°c / 1000”
b) -2°c / 1000’
c) -1°c / 1000’
d) -3°c / 1000m

b) -2°/1000’

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The atmosphere contains approximately 78% Nitrogen, 21% Oxygen & 1% other gases. How much Oxygen would there be in 288 litres of Air?

a) 58 litres
b) 60.8 litres
c) 60.48 litres
d) 224.64 litres

c) 60.48 litres

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If Air pressure was 10 PSI. What would the partial pressure of Oxygen be?

a) 3 PSI
b) 1.8 PSI
c) 2.1 PSI
d) 7.8 PSI

c) 2.1 PSI

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In what altitude range does the temperature remain constant?

a) 0’ - 36,000’
b) 36,000’ - 100,000’
c) 32,000’ - 100,000’
d) 26,000’ - 80,000’

b) 36,000’ - 100,000’

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What are the standard atmospheric conditions at sea level on a standard day?

a) 15°F, 1013.2 hPa, 1.225 Kg / M³
b) 15°C, 1013.2 hPa, 1.225 Kg / M³
c) 15°C , 1013.2 in HG, 1.225 Kg / M³
d) 15°F, 1013.2 in HG, 1.225 Kg / M³

b) 15°C, 1013.2 hPa, 1.225 Kg / M³

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What is the first layer of the atmosphere?

a) Stratosphere
b) Thermosphere
c) Mesosphere
d) Troposphere

d) Troposphere

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In the Stratosphere the temperature remains constant. What is the temperature?

a) 72°C
b) -57°F
c) 131°F
d) -56.5°C

d) -56.5°C

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Is the Density of the air higher or lower on a damp day?

a) Higher
b) Lower
c) Remains the same

b) Lower

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Density decreases with an increase in temperature!

a) True
b) False

a) True

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As Humidity increases. Does density increase or decrease?

a) Increase
b) Decrease

b) Decrease

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The actual amount of water vapour in the air, expressed in Kg / m³.

a) Relative humidity
b) True humidity
c) Absolute Humidity
d) Standard Humidity

c) Absolute Humidity

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The ratio of water present, to the amount of water that could be present if the Air were saturated, is termed?

a) Absolute humidity
b) Relative humidity
c) Standard humidity
d) True Humidity

b) Relative humidity

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The temperature at which Air must be cooled to become saturated is called?

a) Precipitation point
b) Condensation point
c) Dew point
d) Evaporation point

c) Dew point

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What instrument would be used to measure Absolute Humidity?

a) hygrometer
b) hydrometer
c) Dewmeter
d) watermeter

a) hygrometer

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What are the ratios of gases in the Atmosphere?

a) 78% O2, 21% N2, 1% other
b) 80% O2, 19% N2, 1% other
c) 79% N2, 21% O2
d) 78% N2, 21% O2,1% other

d) 78% N2, 21% O2,1% other

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Does decreasing pressure, increase or decrease density?

a) increase
b) decrease
c) No change

a) increase

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What are the standard units (SI system)?

a) Length: Meter (m), Mass: Kilograms (Kg), Weight: Newtons (N), Time: Seconds (s), Amount of substance: Mole (mole), Electric current: amperes (A), Temperature: Kelvin (K).
b) Length: Centimetres (cm), Mass: Kilograms (Kg), Weight: Newtons (N), Time: Seconds (s), Amount of substance: Mole (mole), Electric current: Volts (V), Temperature: Celsius (C)
c) Length: Inches (In), Mass: Pounds (lbs), Weight: Pounds (lbs), Time: Seconds (s), Amount of substance: Mole (mole), Electric current: amperes (A), Temperature: Fahrenheit (F)
d) Length: Kilometres (km), Mass: Tonnes (T), Weight: Newtons (N), Time: Seconds (s), Amount of substance: Mole (mole), Electric current: Volts (V), Temperature: Kelvin (K).

What are the standard units (SI system)?

a) Length: Meter (m), Mass: Kilograms (Kg), Weight: Newtons (N), Time: Seconds (s), Amount of substance: Mole (mole), Electric current: amperes (A), Temperature: Kelvin (K).

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Weight in Newtons is calculated by?

a) Mass x 9.81 m/s²
b) Mass x 9.81 m/s²
c) Mass x 9.81 n/s
d) Mass x 9.81 n/s²

a) Mass x 9.81 m/s²

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The force of gravity remains the same the further you go from the Earths surface!

a) True
b) False

b) False

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1 pound equals how many Kilograms?

a) 0.5
b) 0.454
c) 2.205
d) 0.83

c) 2.205

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A 20kg block of steel weighs how many ponds?

a) 43
b) 44
c) 40
d) 9.07

b) 44.1

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A Pilot wants 1000lbs of fuel delivered to his aircraft; The tanker pumps in litres. If the fuel S.G = 0.8 how many litres does he need?

a) 1000 Litres
b) 600 Litres
c) 547 Litres
d) 454 Litres

c) 547 Litres

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Express 0.0014 in standard scientific notation?

a) 1.0 x 10⁻²
b) 1.4 x 10⁻³
c) 14 x 10⁻⁴
d) 1.4 x 10⁻⁴

b) 1.4 x 10⁻³

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What is the volume of a cylinder 100cm in length and 50cm in diameter?

a) 19.63 Litres
b) 1963 Litres
c) 196.3 Litres
b) 19630 Litres

c) 196.3 Litres

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What is 0.0017 the same as? a) 1.7 x 10⁻³ b) 1.7 x 10⁻⁴ c) 1.7 x 10⁻² d) 1.7 x 10⁻⁵

a) 1.7 x 10⁻³

20 kilometres equals how many millimetres? a) 20 x 10⁶ b) 20 x 10⁹ c) 2 x 10⁸ d) 200 x 10³

a) 20 x 10⁶

20m² equals how many square millimetres? a) 20 x 10³ b) 20 x 10⁵ c) 200 x 10³ d) 20 x 10⁶

d) 20 x 10⁶

How many pints in 4 quarts? a) 6 b) 9 c) 8 d) 10

c) 8

How many inches in 20 cm? a) 7.9 b) 8.1 c) 79 d) 6.5

a) 7.9

If a tank contains 4000 US Gals of fuel, how many litres does it contain? a) 4,000 b) 9,000 c) 15,142 d) 18,160

c) 15,142

50kgs equals how many micrograms? a) 50 x 10³ b) 50 x 10⁵ c) 50 x 10⁴ d) 50 x 10⁹

d) 50 x 10⁹

144 sq inches equals how many sq mm's? a) 929 b) 92,903 c) 20,736 d) 7,736

b) 92,903

How many yards in 14 meters? a) 16.0 b) 15.3 c) 14.0 d) 11.0

b) 15.3

If a Train travels at 14 mph and travels 50 miles, how long will it take? a) 3.0 hrs b) 4.2 hrs c) 3.6 hrs d) 4.0 hrs

c) 3.6 hrs

if a train travels at 30 kph and travels 50 miles, how long will it take? a) 14.0 hrs b) 3.0 hrs c) 2.68 hrs d) 1.67 hrs

c) 2.68 hrs

The mass of a substance divided by the mass of an equal volume of water is termed? a) Specific Density b) Specific Resistance c) Specific Gravity d) Specific Mass

a) Specific Density

The Acceleration due to gravity is generally accepted as? a) 9.81 m/s b) 9.81 m/s³ c) 9.81 m/s² d) 9.81 N

c) 9.81 m/s²

How much work is done when a 500 kg load is raised 2.5 meters? a) 12,293 N b) 12,263 J c) 1,250 J d) 4,905 N

b) 12,263 J

What is the density of 3.5 liters of liquid that weighs 5.3 kg? a) 1855 kg/m³ b) 151 kg/ltr c) 1514 kg/m³ d) 185 kg/m³

c) 1514 kg/m³

What force is extracted by a 531 kg mass under gravitational force? a) 54.1 N b) 5209 N c) 530 N d) 1060 N

b) 5209 N

Work is done when a 500 kg load is raised 2.5 meters = 12,259 J If work done was accomplished in 40 seconds. What would be the power consumed? a) 350 watts b) 306 watts c) 24.6 kw d) 30 kw

b) 306 watts

X▼\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_▼10 N 8m ▲ 2m What force at X is required to balance the force? a) 12 N b) 25 N c) 2.5 N d) 4 N

c) 2.5 N

X 1000 N C of G ⇓←---------------------------6m-------------------------→⇑←---1.2m---→⇓ How much down force on X is required to balance the above scenario? (Note: to be straight and level the sum of all moments must equal zero) a) 1000 N b) 300 N c) 200 N d) 167 N

d) 167 N

A belt and pulley drive is 10cm diameter running at 1000rpm. What diameter dose the drive have to be to get 2300rpm? a) 3.81cm b) 4.35cm c) 6.4cm d) 7.15cm

b) 4.35cm

The driven is rotating at 2500rpm and is 6cm in diameter, the driver is 5cm in diameter. What is the rotational speed? a) 2700 rpm b) 3000 rpm c) 2083 rpm d) 3400 rpm

b) 3000 rpm

If a roundel is to be painted: white ring outer, red ring middle, blue circle inside. The white diameter is 50cm, red is 30cm and the blue is 15cm. What is the area of each of the colors in the roundels? a) White 1963cm², Red 707cm², Blue 176cm² b) White 1963cm², Red 531cm², Blue 176cm² c) White 1256cm², Red 707cm², Blue 176cm² d) White 1256cm², Red 531cm², Blue 176cm²

d) White 1256cm², Red 531cm², Blue 176cm²

What is the area of a tringle with a height of 14 inches and a base of 7cm? a) 17.1 in² b) 38.6 in² c) 19.3 in² d} 1.93 in²

c) 19.3 in²

If a wheel has a diameter of 14ft. What distance will it travel in 15 rotations? a) 1531.7 ft b) 2309 ft c) 615.7 ft d) 659.7 ft

d) 659.7 ft

A Brick measures 3.5 inches by 4.5 inches by 10 inches, what is its volume in cubic millimeters? a) 157.5 x 10⁶ b) 2.58 x 10⁴ c) 2.58 x 10⁵ d) 157.5 x 10⁵

c) 2.58 x 10⁵

What is 4 ¾ as an improper fraction? a) 19/4 b) 7/4 c) 17/4 d) 16/4

a) 19/4

3/8 + ⅔ = a) ¾ b) 1 1/24 c) 7/8 d) 16/4

b) 1 1/24

3/5 - 3/8 = a) 1/8 b) 9/40 c) 2/5 d) ⅓

b) 9/40

3/5 ÷ 2/7 = a) 2/35 b) 2 1/10 c) 3 1/5 d) 2/5

b) 2 1/10

What percentage is 9/20? a) 14% b) 51% c) 36% d) 45%

d) 45%

What Percentage is 7/35? a) 36% b) 12% c) 18% d) 20%

d) 20%

What is 23% of 125? a) 28.75 b) 32.75 c) 41.25 d) 26.15

a) 28.75

What is 4/20 as a decimal? a) 0.15 b) 0.2 c) 0.13 d) 0.23

b) 0.2

What is 1.2 + 3/10 +4/100 + 16/1000? a) 1.456 b) 1.556 c) 1.346 d) 1.2345

b) 1.556

What is the Percentage, 13 of 30? a) 33.3% b) 53.3% c) 43.3% d) 38.3%

c) 43.3%

If 300 lbs is 40% of the rated load of a rope. What is the rated load? a) 548 lbs b) 658 lbs c) 705 lbs d) 750 lbs

d) 750 lbs

What is 45% as a fraction? a) 45/1000 b) 3/8 c) 7/16 d) 9/20

d) 9/20

What is the square route of 48? a) 4.363 b) 7.021 c) 6.928 d) 7.816

c) 6.928

What is the aspect ratio of a wing measuring 40ft span 5ft width? a) 8 : 1 b) 1 : 8 c) 80 : 1 d) 1 : 18

a) 8 : 1

What is 140° F in Celsius? a) 284° C b) 60° C c) 15° C d) 50° C

b) 60° C °C = (F - 32) x 5/9

If A = ^{B + C}_/_DA = 18, B = 4, C = 2. What dose D = ? a) 0.3 b) 0.313 c) 0.333 d) 0.666

c) 0.333

P = Work Done over Time Taken. I the power is 300 watts and the time taken is 50 seconds. What is the work done in Joules? a) 16,000 J b) 15,000 J c) 15,333 J d) 5,000 J

b) 15,000 J ( 1 watt = 1 Joule / second)

if glue has a hardener to filler ratio of 6:1 and you need 5 ltrs of glue, how much hardener should you mix? a) 4.17 ltrs Hardener : 0.83 ltrs Filler b) 0.17 ltrs Hardener : 4.29 ltrs Filler c) 4.29 ltrs Hardener : 0.71 ltrs Filler d) 0.83 ltrs Hardener : 4.17 ltrs Filler

c) 4.29 ltrs Hardener : 0.71 ltrs Filler 7 parts total 6: 1 = 7 parts total & 5/7 = 0.71 (6 x 0.71 = 4.29) (1 x0.71 = 0.71)

If there is 3 parts hardener to 10 parts filler and you have 10 grams of hardener. How many grams of filler do you need? a) 10 g b) 10.3 g c) 3.33 g d) 33.3 g

d) 33.3 g

Which of Newton's laws describes what's happening when thrust is being produced by a jet engine? a) 1st b) 2nd c) 3rd

c) 3rd

Newton's 2nd Law is used to calculate ? a) Thrust b) Inertia c) Change in momentum

c) Change in momentum

Thrust is calculated by subtracting the velocity of the air exiting the jet from the air entering the jet multiplied by the mass of the air. a) True b) False

b) False The force (Thrust) is equal to the exit mass flow rate times the exit velocity minus the free stream mass flow rate times the free stream velocity.

Velocity has Magnitude and Direction. a) True b) False

a) True