Which one of the following factors does not affect the scale of the air photographs? (A) Focal length (B) Flying height (C) Ground elevation (D) None of these

Which one of the following factors does not affect the scale of the air photographs?
(A) Focal length
(B) Flying height
(C) Ground elevation
(D) None of these
by

1 Answer

Answer :

Answer: Option D
by

Related questions

A 50 millimeter focal length camera lens photographs a 4 meter tall tree at a distance of 20 meters. How tall is the image of the tree?

Description : A 50 millimeter focal length camera lens photographs a 4 meter tall tree at a distance of 20 meters. How tall is the image of the tree?

Last Answer : ANSWER: 10 MILLIMETERS

If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height (A) h = dp/(B/H) (B) h = (B/H) dp(C) h = dp/(H/B) (D) h = (H/B) dp

Description : If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height (A) h = dp/(B/H) (B) h = (B/H) dp (C) h = dp/(H/B) (D) h = (H/B) dp

Last Answer : Answer: Option A

Design of horizontal and vertical alignments, super-elevation, sight distance and grades, is worst affected by (A) Width of the vehicle (B) Length of the vehicle (C) Height of the vehicle (D) Speed of the vehicle

Description : Design of horizontal and vertical alignments, super-elevation, sight distance and grades, is worst affected by (A) Width of the vehicle (B) Length of the vehicle (C) Height of the vehicle (D) Speed of the vehicle

Last Answer : Answer: Option D

The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction, is (A) Reciprocal levelling (B) Precise levelling (C) Differential levelling (D) Flying levelling

Description : The method of finding out the difference in elevation between two points for eliminating the  effect of curvature and refraction, is  (A) Reciprocal levelling  (B) Precise levelling  (C) Differential levelling  (D) Flying levelling 

Last Answer : (A) Reciprocal levelling 

What is the height of a hill when the distance between its angles of elevation which are 20.92 degrees and 31 degrees on level ground is 110 meters?

Description : What is the height of a hill when the distance between its angles of elevation which are 20.92 degrees and 31 degrees on level ground is 110 meters?

Last Answer : Using trigonometry the height of the hill works out as 115.58meters rounded to two decimal places

What is the height of a mountain when the distance between its angles of elevation which are 16.6 degrees and 22.3 degrees on level ground is 500 meters?

Description : What is the height of a mountain when the distance between its angles of elevation which are 16.6 degrees and 22.3 degrees on level ground is 500 meters?

Last Answer : This can be solved using the Tangent trigonometric ratio.The larger angle of elevation is the closer angle.Let the horizontal distance from this point to the peak of themountain be d metres; then:height = d ... tan 22.3°≈ 546 m(Generally mountains are more than 600 m, so this is more of ahill.)

What is the height of a building when the distance between its angles of elevation which are 29 degrees and 37 degrees is 30 meters on level ground?

Description : What is the height of a building when the distance between its angles of elevation which are 29 degrees and 37 degrees is 30 meters on level ground?

Last Answer : Using trigonometry its height works out as 63 meters to thenearest meter.--------------------------------------------------------------------------------------------------------let ... substitute the values of α, β and x in and find theheight:h = (30 m tan 37° tan 29°)/(tan 37° - tan 29°) ≈ 63 m

An object of height 4 cm is kept at a distance of 80 cm from the pole af a diverging mirror. If the focal length of the mirror is 10 cm. the height of the image formed is (a) + 3.0 cm (b) + 2.5 cm (c) + 1.0 cm (d) + 0.75 cm

Description : An object of height 4 cm is kept at a distance of 80 cm from the pole af a diverging mirror. If the focal length of the mirror is 10 cm. the height of the image formed is (a) + 3.0 cm (b) + 2.5 cm (c) + 1.0 cm (d) + 0.75 cm

Last Answer : (c) + 1.0 cm

A sphere of 1 cm radius is placed at the distance of 50 cm from the convex lens of 10 cn focal length. What would be the height of the image of sphere ?

Description : A sphere of 1 cm radius is placed at the distance of 50 cm from the convex lens of 10 cn focal length. What would be the height of the image of sphere ?

Last Answer : 0.5cm

The sound power level of a jet plane flying at a height of 1 km is 160 dB. What is the maximum sound pressure level on the ground directly below the plane assuming that the aircraft radiates sound equally in all directions? A. 59.1 dB B. 69.1 dB C. 79.1 dB D. 89.1 dB

Description : The sound power level of a jet plane flying at a height of 1 km is 160 dB. What is the maximum sound pressure level on the ground directly below the plane assuming that the aircraft radiates sound equally in all directions? A. 59.1 dB B. 69.1 dB C. 79.1 dB D. 89.1 dB

Last Answer : D. 89.1 dB

A back sight (A) Is always taken on a point of known elevation or can be computed (B) Is added to the known level to obtain the instrument height (C) Taken on an inverted staff is treated as negative (D) All the above

Description : A back sight  (A) Is always taken on a point of known elevation or can be computed  (B) Is added to the known level to obtain the instrument height  (C) Taken on an inverted staff is treated as negative  (D) All the above 

Last Answer : (D) All the above 

The convexity provided to the carriageway between the crown and edge of the pavement, is known as (A) Super-elevation (B) Camber (C) Height of the pavement (D) None of these

Description : The convexity provided to the carriageway between the crown and edge of the pavement, is known as (A) Super-elevation (B) Camber (C) Height of the pavement (D) None of these

Last Answer : Answer: Option B

Let’s say we are flying over a large, flat part of Africa. Half of the area is hotter than the other half. The surface pressure is 1000 hPa everywhere. If we fly over at an elevation of 500 m above the surface, in which area does the pressure gauge (altimeter) in our plane read the lowest pressure? (a) The cold part. (b) The hot part. (c) The gauge reads the same pressure everywhere. (d) The gauge varies with the latitude and the temperature of the surface.

Description : Let's say we are flying over a large, flat part of Africa. Half of the area is hotter than the other half. The surface pressure is 1000 hPa everywhere. If we fly over at an elevation ... reads the same pressure everywhere. (d) The gauge varies with the latitude and the temperature of the surface.

Last Answer : (a) The cold part.

An isobar is a line which connects all points below the ground surface at which (a) The local ground elevation is same (b) The settlement is same (c) The vertical stress is the same (d) The ground elevation is varying

Description : An isobar is a line which connects all points below the ground surface at which (a) The local ground elevation is same (b) The settlement is same (c) The vertical stress is the same (d) The ground elevation is varying

Last Answer : (c) The vertical stress is the same

A counter may be defined as an imaginary line passing through (a) Points on the longitudinal section (b) Points of equal elevation (c) Point of equal local ground slope (d) Points of transverse section surveys

Description : A counter may be defined as an imaginary line passing through (a) Points on the longitudinal section (b) Points of equal elevation (c) Point of equal local ground slope (d) Points of transverse section surveys

Last Answer : (b) Points of equal elevation

Keeping the instrument height as 1½ m, length of staff 4 m, the up gradient of the ground 1 in 10, the sight on the up slope must be less than (A) 25 cm (B) 20 m (C) 45 m (D) 10 m

Description : Keeping the instrument height as 1½ m, length of staff 4 m, the up gradient of the ground 1 in 10,  the sight on the up slope must be less than  (A) 25 cm  (B) 20 m  (C) 45 m  (D) 10 m

Last Answer : (C) 45 m 

Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than (A) 30 m (B) 25 m (C) 20 m (D) 15 m

Description : Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the  sight on the down-slope, must be less than  (A) 30 m  (B) 25 m  (C) 20 m  (D) 15 m 

Last Answer : (B) 25 m 

The ground surface slopes 1 in 50 along a proposed railway embankment 150 m in length. The height of the embankment at zero chainage is 0.5 m, the width is 11 m and side slopes 2:1. If the falling gradient of the embankment is 1 in 150, the quantity of the earthwork calculated by Prismoidal formula, is (A) 3250 m3 (B) 3225 m3 (C) 3275 m3 (D) 3300 m3

Description : The ground surface slopes 1 in 50 along a proposed railway embankment 150 m in length. The height of the embankment at zero chainage is 0.5 m, the width is 11 m and side slopes 2:1. If the falling gradient ... calculated by Prismoidal formula, is (A) 3250 m3 (B) 3225 m3 (C) 3275 m3 (D) 3300 m3

Last Answer : (B) 3225 m3

t higher elevation airports the pilot should know that indicated airspeed: a. will be unchanged but ground speed will be faster b. will be higher but ground speed will be unchanged c. should be increased to compensate for the thinner air d. should be higher to obtain a higher landing speed

Description : t higher elevation airports the pilot should know that indicated airspeed: a. will be unchanged but ground speed will be faster b. will be higher but ground speed will be unchanged c. should be increased to compensate for the thinner air d. should be higher to obtain a higher landing speed

Last Answer : a. will be unchanged but ground speed will be faster

Pick up the correct specification of Ramsden eyepiece from the following: (A) It consists of two equal piano convex lenses (B) The curved surfaces of Plano-convex lenses face each other (C) The distance between the diaphragm and the front lens of the eyepiece is kept equal to 1/4 th of the focal length of a lens so that rays from a point on the diaphragm enter the eye as a parallel beam (D) All the above

Description : Pick up the correct specification of Ramsden eyepiece from the following:  (A) It consists of two equal piano convex lenses  (B) The curved surfaces of Plano-convex lenses face each other  (C) ... from a point on the diaphragm enter the eye as a  parallel beam  (D) All the above 

Last Answer : (D) All the above 

Pick up the correct statement from the following: (A) The power of a lens is the reciprocal of its focal length (B) The unit of power of the lens is Diopter (C) The power of two or more thin lenses in contact is the power of the combination of the lenses (D) All the above

Description : Pick up the correct statement from the following:  (A) The power of a lens is the reciprocal of its focal length  (B) The unit of power of the lens is Diopter  (C) The power of two or more thin lenses in contact is the power of the combination of the  lenses  (D) All the above 

Last Answer : (D) All the above 

Two concave lenses of 60 cm focal length are cemented on either side of a convex lens of 15 cm focal length. The focal length of the combination is (A) 10 cm (B) 20 cm (C) 30 cm (D) 40 cm

Description : Two concave lenses of 60 cm focal length are cemented on either side of a convex lens of 15 cm  focal length. The focal length of the combination is  (A) 10 cm  (B) 20 cm  (C) 30 cm  (D) 40 cm 

Last Answer : (C) 30 cm 

In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is (A) 5.24 cm (B) 6.24 cm (C) 7.24 cm (D) 8.24 cm

Description : In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is (A) 5.24 cm (B) 6.24 cm (C) 7.24 cm (D) 8.24 cm

Last Answer : (C) 7.24 cm

Diopter is the power of a lens having a focal length of (A) 25 cm (B) 50 cm (C) 75 cm (D) 100 cm

Description : Diopter is the power of a lens having a focal length of (A) 25 cm (B) 50 cm (C) 75 cm (D) 100 cm

Last Answer : (D) 100 cm

The power of a lens (A) Is reciprocal of its focal length (B) Is positive if it is a convex lens (C) Is negative if it is a concave lens (D) Is measured in Diopter

Description : The power of a lens (A) Is reciprocal of its focal length (B) Is positive if it is a convex lens (C) Is negative if it is a concave lens (D) Is measured in Diopter

Last Answer : (D) Is measured in Diopter

If f1 and f2 are the distances from the optical centre of a convex lens of focal length to conjugate two points P1 and P2 respectively, the following relationship holds good (A) f = f1 + f2 (B) f = ½ (f1 + f2) (C) 1/f = 1/f1 + 1/f2 (D) None of these

Description : If f1 and f2 are the distances from the optical centre of a convex lens of focal length to conjugate two points P1 and P2 respectively, the following relationship holds good (A) f = f1 + f2 (B) f = ½ (f1 + f2) (C) 1/f = 1/f1 + 1/f2 (D) None of these

Last Answer : (C) 1/f = 1/f1 + 1/f2

Flint glass (A) Has slightly the greater refracting power than crown glass (B) Has roughly double refracting power than that of crown (C) And crown glass proportions yield the required focal length and neutralise the dispersion produced by the convex lens at the emergence from the concave (D) All the above

Description : Flint glass (A) Has slightly the greater refracting power than crown glass (B) Has roughly double refracting power than that of crown (C) And crown glass proportions yield the required focal length ... dispersion produced by the convex lens at the emergence from the concave (D) All the above

Last Answer : (D) All the above

If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant (A) 0.1 (B) 0.4 (C) 0.6 (D) 1.33

Description : If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant (A) 0.1 (B) 0.4 (C) 0.6 (D) 1.33

Last Answer : (B) 0.4

If is the stadia distance, is the focal length and is the distance between the objective and vertical axis of the techeometer, the multiplying constant, is (A) f/i (B) i/f (C) (f + d) (D) f/d

Description : If is the stadia distance, is the focal length and is the distance between the objective and vertical axis of the techeometer, the multiplying constant, is (A) f/i (B) i/f (C) (f + d) (D) f/d

Last Answer : (A) f/i

A bird weighing 2 pounds is inside a completely enclosed box weighing 3 pounds. There is no air exchange between the inside and outside of the box. If the box is placed on a scale, and the bird is flying inside the box, what weight does the scale read?

Description : A bird weighing 2 pounds is inside a completely enclosed box weighing 3 pounds. There is no air exchange between the inside and outside of the box. If the box is placed on a scale, and the bird is flying inside the box, what weight does the scale read? 

Last Answer : ANSWER: 5 POUNDS

The focal length of a convex lens of glass `(mu = 1.5)` in air is 30 cm. Find its focal length when the lens is placed in water `(mu = 4//3)`.

Description : The focal length of a convex lens of glass `(mu = 1.5)` in air is 30 cm. Find its focal length when the lens is placed in water `(mu = 4//3)`.

Last Answer : The focal length of a convex lens of glass `(mu = 1.5)` in air is 30 cm. Find its focal length when the lens is placed in water `(mu = 4//3)`.

The focal length of a plano-convex lens is 20 cm in air. Refractive index of glass is 1.5. Calculate (i) the radius of curvature of lens surface and (

Description : The focal length of a plano-convex lens is 20 cm in air. Refractive index of glass is 1.5. Calculate (i) the radius of curvature of lens surface and (

Last Answer : The focal length of a plano-convex lens is 20 cm in air. Refractive index of glass is 1.5. ... length when immersed in liquid of refractive index 1.6

A double convex lens has radii 20 cm. The index of refraction of glass is 1.5. Compute the focal length of this lens in air and when immersed in carbo

Description : A double convex lens has radii 20 cm. The index of refraction of glass is 1.5. Compute the focal length of this lens in air and when immersed in carbo

Last Answer : A double convex lens has radii 20 cm. The index of refraction of glass is 1.5. Compute ... immersed in carbon disulphide of refractive index 1.63.

If the rate of change of the super-elevation along a curved portion of a 7 metre wide road is 1 in 150 and the maximum super-elevation allowed is 1 in 15, the maximum length of the transition curve to be provided at either end, is (A) 65 m (B) 70 m (C) 75 m (D) 80 m

Description : If the rate of change of the super-elevation along a curved portion of a 7 metre wide road is 1 in 150 and the maximum super-elevation allowed is 1 in 15, the maximum length of the transition curve to be provided at either end, is (A) 65 m (B) 70 m (C) 75 m (D) 80 m

Last Answer : Answer: Option B

The length of a transition curve, is governed by (A) Rate of change of radial acceleration (B) Rate of change of super-elevation (C) Both (a) and (b) (D) Neither (a) nor (b)

Description : The length of a transition curve, is governed by (A) Rate of change of radial acceleration (B) Rate of change of super-elevation (C) Both (a) and (b) (D) Neither (a) nor (b)

Last Answer : Answer: Option C

Flow of air from one place to the other is caused due to (A) The sum of elevation (B) Pressure head (C) Velocity head (D) All of the above

Description : Flow of air from one place to the other is caused due to (A) The sum of elevation (B) Pressure head (C) Velocity head (D) All of the above

Last Answer : (D) All of the above

The angle of elevation of the top of a tower from two points distant s and t from its foot are complementary. Prove that the height of the tower is √st. -Maths 9th

Description : The angle of elevation of the top of a tower from two points distant s and t from its foot are complementary. Prove that the height of the tower is √st. -Maths 9th

Last Answer : let the height of the tower= QR Angle of elevation= Angle RSQ= theta Then angle QTR= 90 degree- theta In triangle QTR, Tan(90 degree- theta)= QR/t That implies: cot theta= QR/t That implies: 1/tan theta= QR/t That ... ) From ( 1 ) and ( 2 ), t/QR= QR/s That implies: QR^2= st That implies: QR= root

What is the height of a moutain when from the top of a tower which is 180 meters high the angle of elevation is 25.3 degrees and its bottom angle of elevation is 26.42 degrees?

Description : What is the height of a moutain when from the top of a tower which is 180 meters high the angle of elevation is 25.3 degrees and its bottom angle of elevation is 26.42 degrees?

Last Answer : Using the sine rules in trigonometry the height of the mountainworks out as 3704 meters in height to the nearest whole number.

What is the height of a mountain when from the bottom of a tower 180 meters in height the angle of elevation is 26.42 degrees and from its top the angle of elevation is 25.3 degrees?

Description : What is the height of a mountain when from the bottom of a tower 180 meters in height the angle of elevation is 26.42 degrees and from its top the angle of elevation is 25.3 degrees?

Last Answer : By drawing a sketch from the given information then usingtriangulation and trigonometry the height of the mountain works outas 3704.435 meters rounded to three decimal places.

What is the height of a mountain when from the bottom of a tower 180 meters in height the angle of elevation is 26.42 degrees and from its top the angle of elevation is 25.3 degrees?

Description : What is the height of a mountain when from the bottom of a tower 180 meters in height the angle of elevation is 26.42 degrees and from its top the angle of elevation is 25.3 degrees?

Last Answer : By drawing a sketch from the given information then usingtriangulation and trigonometry the height of the mountain works outas 3704.435 meters rounded to three decimal places.

What is the height of the telephone pole if shadow is 20 feet long and the angle of elevation from the groung if 70 degrees?

Description : What is the height of the telephone pole if shadow is 20 feet long and the angle of elevation from the groung if 70 degrees?

Last Answer : Using the tangent ratio height of telegraph pole is 55 feet tothe nearest integer.

The angle of elevation of the antenna beam is 20°. Calculate the transmission-path distance for an ionospheric transmission that utilizes a layer of virtual height 200 km. Use flat-earth approximation. A. 966 km B. 2100 km C. 1100 km D. 405 km

Description : The angle of elevation of the antenna beam is 20°. Calculate the transmission-path distance for an ionospheric transmission that utilizes a layer of virtual height 200 km. Use flat-earth approximation. A. 966 km B. 2100 km C. 1100 km D. 405 km

Last Answer : C. 1100 km

An aircraft climbs from an airfield, elevation 1500ft, QNH 1023mb, to FL75. What height does the aircraft have to climb? (Assume 1mb=30ft) a. 6600 ft b. 7800 ft c. 6300 ft d. 6000 ft

Description : An aircraft climbs from an airfield, elevation 1500ft, QNH 1023mb, to FL75. What height does the aircraft have to climb? (Assume 1mb=30ft) a. 6600 ft b. 7800 ft c. 6300 ft d. 6000 ft

Last Answer : c. 6300 ft

An aircraft climbs from an airfield, elevation 1500ft, QNH 1023mb, to FL75. What height does the aircraft have to climb? (Assume 1mb=30ft) a. 6600 ft b. 7800 ft c. 6300 ft d. 6000 ft

Description : An aircraft climbs from an airfield, elevation 1500ft, QNH 1023mb, to FL75. What height does the aircraft have to climb? (Assume 1mb=30ft) a. 6600 ft b. 7800 ft c. 6300 ft d. 6000 ft

Last Answer : c. 6300 ft

Increasing which of the following factors will decrease the density of a radiograph: A. Milliampere B. Time C. KvP Kilovoltage D. Object-film distance E. Focal spot-object distance

Description : Increasing which of the following factors will decrease the density of a radiograph: A. Milliampere B. Time C. KvP Kilovoltage D. Object-film distance E. Focal spot-object distance

Last Answer : E. Focal spot-object distance

How do you Find the angle of elevation of the sun from the ground when a tree that is yards tall casts a shadow W yards long.?

Description : How do you Find the angle of elevation of the sun from the ground when a tree that is yards tall casts a shadow W yards long.?

Last Answer : Need answer

The total propagation delay time from transmission to reception of signals from a ground transmitter to ground receiver with angle of elevation at 10 degrees respectively is A. 273 ms B. 239 ms C. 275 ms D. 260 ms

Description : The total propagation delay time from transmission to reception of signals from a ground transmitter to ground receiver with angle of elevation at 10 degrees respectively is A. 273 ms B. 239 ms C. 275 ms D. 260 ms

Last Answer : A. 273 ms

A ground station is operating to a geostationary satellite at a 5° angle of elevation. Calculate the round-trip time between ground station and satellite. A. 275 s B. 275 ms C. 137.5 s D. 137.5 ms

Description : A ground station is operating to a geostationary satellite at a 5° angle of elevation. Calculate the round-trip time between ground station and satellite. A. 275 s B. 275 ms C. 137.5 s D. 137.5 ms

Last Answer : B. 275 ms

Pick up the correct statement from the following: (A) For the same feature, the photograph taken from the satellite vertically above the aircraft, the height displacement is lesser than the aerial photograph (B) The scale of the aerial photograph depends upon the scale of the topography (C) The feature at the principal point has no height displacement (D) All of the above

Description : Pick up the correct statement from the following: (A) For the same feature, the photograph taken from the satellite vertically above the aircraft, the height displacement is lesser than the aerial photograph ... C) The feature at the principal point has no height displacement (D) All of the above

Last Answer : Answer: Option D

What factors to consider while setting tower elevation?

Description : What factors to consider while setting tower elevation?

Last Answer : Answer: NPSH, Operator access, Maintenance access, Minimum clearance, re-boiler type , common area, type of support, Tower dimensions, type of head, bottom outlet size, foundation details, minimum clearances.