Elements of Remote Sensing MCQ Practice Questions (Civil) Set 4

Pick up the correct statement from the following:


Options are :

  • The relative phase difference between the waves is important and not the absolute phase of a point on the wave
  • All of these
  • The surface defined by the locus of points having same phase, is called a wave front
  • The wave whose surface of constant phase are parallel planes, is known as a plane wave

Answer :All of these

Hydraulics MCQ Practice Questions (Civil Engineering) Set 9

Which one of the following residual biases involves the GPS accuracy ?


Options are :

  • Satellite dependent baises due to uncertainty in the orbital parameters of the satellite
  • Signal propagation baises due to the sphere and troposphere propogation
  • All the above
  • Receiver-depandent biases due to clock stability with line

Answer :All the above

Which one of the following parameters is accurate for DGPS.


Options are :

  • Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station
  • Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station
  • Positional accuracies ~ 5 - 10 m if rover is less than 25 km
  • Positional accuracies ~ 2 - 5m if rover is less than 2-5 fm from the reference station

Answer :Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station

Rayleigh's criteria for a rough surface is: (where letters carry their usual meanings)


Options are :

  • h > ?/? cos ?
  • h < ?/8 cos ?
  • h = ?/8 cos ?
  • h > ?/8 cos ?

Answer :h > ?/8 cos ?

Theory of Structures MCQ Practice Questions (Civil Eng) Set 1

Critical angle of electromagnetic radiation takes place if:


Options are :

  • Angle of refraction is equal to 90
  • Angle of incidence is equal to 90
  • Angle of incidence is equal to angle of refraction
  • Angle of incidence is greater than the angle of refraction

Answer :Angle of refraction is equal to 90

Hydraulics MCQ Practice Questions (Civil Engineering) Set 1

The changes in the reflectivity/emissivity with time, is called:


Options are :

  • Temporal variation
  • None of these
  • Spatial variation
  • Spectral variation

Answer :Temporal variation

Crop Acreage and Production Estimation (CAPE) was funded and taken up in 1983 by:


Options are :

  • Russia
  • India
  • European Union
  • USA

Answer :India

In GPS, receivers are used are:


Options are :

  • Quartz clocks
  • Electronic clocks
  • Atomic clocks
  • Mechanical clocks

Answer :Quartz clocks

Hydraulics MCQ Practice Questions (Civil Engineering) Set 7

Pick up the correct statement from the following:


Options are :

  • The minimum frequency of light for which no electrons are emitted, is called threshold frequency
  • At the polarising angle, the reflected and refracted rays are orthogonal
  • Polarising angle of glass is 57.5
  • All the above

Answer :All the above

In case of reflection and refraction of electromagnetic radiation:


Options are :

  • Angle of refraction = sum of the angles of incidence and refraction
  • Angle of incidence = angle of reflection
  • All the above
  • Angle of incidence = angle of refraction

Answer :Angle of incidence = angle of reflection

The infrared portion of EMR lies between:


Options are :

  • 0.7 to 14 ?m
  • 0.4 - 0.7 ?m
  • 0.7 - 1.3 ?m
  • 0.5 mm to 1m

Answer :0.7 to 14 ?m

Hydraulics MCQ Practice Questions (Civil Engineering) Set 9

Which one of the following statements is correct ?


Options are :

  • ? radians equal to 180
  • The cone subtended by an area on the sphere at the centre, is called the solid angle
  • The unit of the solid angle is steradian (Sr)
  • All of these
  • The solid angle is equal to the ratio of the area on the sphere and the square of the radius of the sphere

Answer :All of these

Electromagnetic spectrum contains:


Options are :

  • Infrared rays (wave length < 10-4 m)
  • Radio rays (wave length > 1 m)
  • Ultraviolet rays (wave length < 10-6 m)
  • All of these
  • Gamma rays (wave length < 10-10 m)

Answer :All of these

For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length lcoh is:


Options are :

  • 250 km
  • 500 km
  • 230 km
  • 130 km

Answer :230 km

Elements of Remote Sensing MCQ Practice Questions (Civil) Set 4

Pick up the correct statement from the following:


Options are :

  • U.S.A.'s highly secret mission CORONA started the collection of intelligence photograpy in 1960
  • All of these
  • The United State's Explorer 6 transmitted the first picture of the earth in August 1959
  • The first man-made satellite, Sputnik-l' was launched on 4th October, 1957
  • Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960

Answer :All of these

Spatial variation in horizontal and vertical directions, is caused due to:


Options are :

  • Chemical weathering of rocks
  • Physical weathering of rocks
  • All of these
  • Biological'weathering of rocks

Answer :All of these

The reflectance from a surface is called specular reflection if it follows:


Options are :

  • Lambert's cosine law
  • Snell's law
  • All of these
  • Planktan's law

Answer :Snell's law

Elements of Remote Sensing MCQ Practice Questions (Civil) Set 3

Which one of the following statements is correct ?


Options are :

  • All the above
  • A map is a collection of stored, analysed data, its stored information is suitability used in making decisions
  • The information system is the chain of operations
  • The function of an information system is to improve ones ability to make decisions

Answer :All the above

The maximum sun's radiation occurs around:


Options are :

  • 0.55 ? wave length
  • 0.4 ?m wave length
  • 0.7 ? wave length
  • None of these

Answer :0.55 ? wave length

Who coined the term, 'Remote sensing' ?


Options are :

  • Evelyn L. Pruitt, a geographer
  • None of these
  • Gaspard Felix Tournachon, a French scientist
  • Wilbur Wright, an Italian sciencist

Answer :Evelyn L. Pruitt, a geographer

Hydraulics MCQ Practice Questions (Civil Engineering) Set 10

'A time varrying electric field produces a magnetic field' This phenemenon is called:


Options are :

  • Kirchoff's law
  • Ampere Maxwell's law
  • Hertz's law
  • Faraday's law

Answer :Ampere Maxwell's law

Which one of the following geometric errors of satellite sensors is random ?


Options are :

  • Panoramic distortion
  • Scan skew
  • Altitude variation
  • Earth rotation

Answer :Altitude variation

Pick up the correct statement from the following:


Options are :

  • Phytoplankton contains photosyn-thetically active pigment
  • An increase of phytoplankton increases the back scattering in the green region
  • An increase of phytoplankton absorbs the bule region rapidly
  • An increase of phytoplankon decreases the back scattering in the green region

Answer :An increase of phytoplankon decreases the back scattering in the green region

Hydraulics MCQ Practice Questions (Civil Engineering) Set 4

Which one of the following quantities forms the basis of radiometery ?


Options are :

  • Radiant flux (?)
  • Radiant energy (Q)
  • All of these
  • Radiance (L)
  • Radiant intensity (I)

Answer :All of these

Earth observations from a satellite platform provides:


Options are :

  • Synoptic view of a large area
  • Repetitive observations of the same area with intervals of a few minutes to a few weeks
  • Constant solar zenith angles and similar illumination conditions
  • All of these

Answer :All of these

Which one of the following statement is correct ?


Options are :

  • The radiant energy which falls upon a surface, is termed as irradiance
  • Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation
  • The rate of transfer of radiant energy is called flux and is expressed in watts
  • All of these
  • The radiant energy which falls away from the surface is termed as radient exitance and is measured in Wm^(-2)

Answer :All of these

RCC Structures Design MCQ Practice Questions (Civil Eng) Set 7

Which one of the following statement is incorrect regarding the electromagnetic radiation ?


Options are :

  • These are produced by the motion of electric charge
  • The changing electric fields induce the changing magnetic fields in the surrounding medium
  • The oscillation of charged particles sets up changing electric fields
  • None of these

Answer :None of these

The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is:


Options are :

  • 8
  • 24
  • 16
  • 12

Answer :24

DGPS is based on the concept that bais errors in the position of locations in a given local area, are same if their distances are within:


Options are :

  • 75 km
  • 1250 km
  • 50 km
  • 100 km
  • 25 km

Answer :100 km

Hydraulics MCQ Practice Questions (Civil Engineering) Set 9

Consider the following statements regarding the satellite imaging:


1. The satellite orbit is fixed in the inertial space

2. During successive across-track imaging, the earth rotates beneath the sensor

3. The satellite images a skewed area

Which one of the following statements is/are correct ?


Options are :

  • 1, 3
  • 2, 3
  • 1, 2, 3
  • 1, 2

Answer :1, 2, 3

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