Which of the following is an example of failure in flexible pavements?
Alligator cracking
Mud pumping
Warping cracks
Shrinkage cracks
Correct Answer :
A. Alligator cracking
Related Questions
The maximum length and pavement strength of the runway is that of
A 1
B 2
B 3
G 7
The length of clear zone for none instrument runway of a small aircraft is
150 m
300 m
600 m
750 m
The width and interval of transverse centre line bars along the extended centre line of runway, in approach lighting system are
3 m and 30 m
4.2 m and 30 m
4.2 m and 50 m
3 m and 45 m
An airport has 4 gates. If the weighted average gate occupancy time is 30 minutes and gate utilisation factor is 0.5, then the capacity of the gate will be
1 aircraft per hour
2 aircrafts per hour
4 aircrafts per hour
16 aircrafts per hour
The cruising speed of the aircraft is 500 kmph. If there is a head wind of 50 kmph, then the air speed and ground speed of the aircraft respectively will be
450 kmph and 500 kmph
500 kmph and 450 kmph
450 kmph and 450 kmph
500 kmph and 500 kmph
Assertion A: The width of a taxiway is smaller than the runway width. Reason R: The speed of the aircraft on a taxiway is greater than that on runway. Select your answer based on coding system given below
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
The reduced level of the proposed site of an air port is 2500 m above M.S.L. If the recommended length by I.C.A.O. for the runway at sea level is 2500 m, the required length of the runway is
2500 m
3725 m
3000 m
3250 m
According to I.C.A.O. the slope of transitional surface at right angles to the centre line of runway, is kept
1 in 4
1 in 5
1 in 6
1 in 7
The engine failure case for determining the basic runway length may require
Only clearway
Only stop way
Either a clearway or a stop-way
Either a clearway or a stop-way or both
For determining the basic runway length, the landing case requires that aircraft should come to a stop within p % of the landing distance. The value of p is
40 %
50 %
60 %
75 %
The maximum value of the angle of turning of the nose gear large jet aircrafts, is limited to
20°
30°
45°
60°
For the proposed runway stated in if the aerodrome reference temperature is 17°.2, the net designed length of the runway is
2716 m
2816 m
2916 m
3016 m
For Class A Air port the difference of reduced levels of higher and lower edges of the conical surface, is
25 m
50 m
75 m
100 m
For night landing, the thresholds are lighted
Green
Red
White
Yellow
Pick up the component not applicable to aeroplanes
Wings
Engines
Air screw
None of these
In approach areas of runways equipped with instrumental landing facilities any object within 4.5 km distance from runway end shall be considered as an obstruction if its height is more than
20 m
30 m
45 m
51 m
For the proposed air port, the survey project provides
Master plan
Topographic plan
Grading plan
All the above
Pick up the incorrect statement from the following:
Channelization of pavement is caused by constant use of tri-cycle gears of aircraft
Blast pads are used over cohesionless soils to resist erosion due to tremendous speed of the jet blast
Over-run areas of at least 300 m length on either side of the runway are provided
None of these
Effective length of a runway is the distance between
Ends of the runway
Point of intersection of the obstruction clearance line and the extended plane of the runway surface, and the other end of the runway
Point of intersection of the glide path and the extended plane of the runway surface and the other end of the runway
Ends of the clear way on either side
As per ICAO recommendation, the rate of change of longitudinal gradient per 30 m length of vertical curve for A and B type of airports is limited to a maximum of
0.1 %
0.2 %
0.3 %
0.4 %
The coordinates of the ends of a runway are (5000, 5000) and (8000, 7000). The co-ordinates of another runway are (4600, 5100) and (7000, 5300). The co-ordinates of the A.R.P. are
(6500, 6000)
(5800, 5200)
(61500, 5600)
(8000, 7000)
Which of the following is used for servicing and repairs of the aircraft?
Apron
Hanger
Terminal building
Holding apron
The fuse large includes
Passengers chamber
Pilot's cabin
Tail of aircraft
All the above
The length of runway is increased per 300 m rise above M.S.L.
3 %
4 %
5 %
7 %
Assertion A : Airport capacity during IFR conditions is usually less than that during VFR conditions. Reason R: During clear weather condition (VFR), the aircrafts on final approach to runway can be spaced closer during poor visibility conditions. Select your answer based on the coding system given below:
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
As per ICAO, the minimum basic runway length for A and E type of airport will be
1500 m and 600 m
2100 m and 750 m
1500 m and 750 m
2100 m and 600 m
Total correction for elevation, temperature and gradient for a runway should not be more than
15 %
20 %
25 %
35 %
The slope of the transitional surface for A, B and C type of runway shall be
1 : 5
1 : 7
1 : 10
1 : 12
The runway orientation is made so that landing and takeoff are
Against the wind direction
Along the wind direction
Perpendicular to wind direction
None of these
From the end of an instrumental runway, the approach surface rises outwards
1 in 20
1 in 30
1 in 40
1 in 50