Top 80+ Solved Elements of Remote Sensing MCQ Questions Answer
Q. Which one of the following statements is correct?
a. during the day, earth reflects solar radiation
b. during the day, earth reflects both solar radiations the emission from its surface
c. during the night, earth emits radiation from its surface
d. all of these
Q. A reduction of nitrogen nutrient in plants:
a. affects leaf colour
b. reduces pigment concentration
c. increase the visible reflectivity
d. all of these
Q. Remote sensing techniques make use of the properties of ___________ emitted, reflected ordiffracted by the sensed objects:
a. electric waves
b. sound waves
c. electromagnetic waves
d. wind waves
Q. Which one of the following statement is incorrect regarding the electromagnetic radiation?
a. these are produced by the motion of electric charge
b. the oscillation of charged particles sets up changing electric fields
c. the changing electric fields induce the changing magnetic fields in the surrounding medium
d. none of these
Q. The altitudinal distance of a geostationary satellite from the earth is about:
a. 26,000 km
b. 30,000 km
c. 36,000 km
d. 44,000 km
Q. The ratio of the total solar radiant energy returned by a planetary body to the total radiant energyincident on the body, the called:
a. reflectance
b. reflectance factor
c. albedo
d. none of these
Q. Which one of the following statement is correct?
a. radiant energy expressed in joules, is the energy associated with electromagnetic radiation
b. the rate of transfer of radiant energy is called flux and is expressed in watts
c. the radiant energy which falls upon a surface is termed as irradiance
d. all of these
Q. Which one of the following parameters is accurate for DGPS?
a. positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station
b. positional accuracies ~ 2 - 5m if rover is less than 2-5 fm from the reference station
c. positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station
d. positional accuracies ~ 5 - 10 m if rover is less than 25 km
Q. Crop Acreage and Production Estimation (CAPE) was funded and taken up in 1983 by:
a. usa
b. european union
c. russia
d. india
Q. If flying height of a spacecraft is H, the length of air base is B and the parallax difference betweentwo 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
Q. Critical angle of electromagnetic radiation takes place if
a. angle of incidence is equal to angle of refraction
b. angle of incidence is greater than the angle of refraction
c. angle of incidence is equal to 90°
d. angle of refraction is equal to 90°
Q. Earth observations from a satellite platform provide:
a. synoptic view of a large area
b. constant solar zenith angles and similar illumination conditions
c. repetitive observations of the same area with intervals of a few minutes to a few weeks
d. all of these
Q. DGPS is based on the concept that bias errors in the position of locations in a given local area, aresame if their distances are within
a. 25 km
b. 50 km
c. 75 km
d. 100 km
Q. Electromagnetic radiation:
a. produces a time varying magnetic field and vice versa
b. once generated, remains self-propagating
c. is capable to travel across space
d. all of these
Q. Which one of the following residual biases involves the GPS accuracy?
a. satellite dependent biases due to uncertainty in the orbital parameters of the satellite
b. receiver-dependent biases due to clock stability with line
c. signal propagation biases due to the sphere and troposphere propagation
d. all the above