Practice Test: Question Set - 03
1. Remote sensing techniques make use of the properties of ___________ emitted, reflected or diffracted by the sensed objects:
- (A) Electric
waves
- (B) Sound waves
- (C) Electromagnetic
waves
- (D) Wind waves
2. A reduction of nitrogen nutrient in plants:
- (A) Affects
leaf color
- (B) Reduces
pigment concentration
- (C) Increase
the visible reflectivity
- (D) All
of these
3. 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
4. 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
5. The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:
- (A) Reflectance
- (B) Reflectance
factor
- (C) Albedo
- (D) None of
these
6. Due to scan geometry of a satellite sensor:
- (A) The off-nadir
resolution is degraded
- (B) The ground
distance swept by the senor, IFOV is proportional to sec2θ, where θ
is the angle of scan measured from the nadir
- (C) The details
towards the edge of the scan get compressed
- (D) All of these
7. 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
8. 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 - 5 m if rover is less than 2-5 km 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
9. Pick up the correct statement from the following:
- (A) The
surface defined by the locus of points having same phase, is called a wave
front
- (B) The wave
whose surface of constant phase are parallel planes, is known as a plane wave
- (C) The
relative phase difference between the waves is important and not the absolute
phase of a point on the wave
- (D) All of these
10. Which one of the following statements is correct?
- (A) π radians equal to 180°
- (B) The cone
subtended by an area on the sphere at the centre, is called the solid angle
- (C) The solid
angle is equal to the ratio of the area on the sphere and the square of the
radius of the sphere
- (D) All of these
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