Elements of Remote Sensing Objectives – Set 05

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(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

Q2. The infrared portion of EMR lies between

(A) 0.4 – 0.7 μm
(B) 0.5 mm to 1 μm
(C) 0.7 – 1.3 μm
(D) 0.7 to 14 μm

Q3. The maximum sun’s radiation occurs around:

(A) 0.4 μm wave length
(B) 0.55 μ wave length
(C) 0.7 μ wave length
(D) None of these

Answer: (B) 0.55 μ wave length

Q4. 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

Q5. Which one of the following geometric errors of satellite sensors is random?

(A) Scan skew
(B) Panoramic distortion
(C) Earth rotation
(D) Altitude variation

(A) 15,200 km
(B) 26,600 km
(C) 18,400 km
(D) 36,000 km

Q7. ‘A’ and ‘B’ are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?

(A) Height displacement of A will be less than that of B
(B) Height displacement of B will be less than that of A
(C) Height displacement of A and B is equal
(D) Height displacement of A and B will be towards each other

Answer: (A) Height displacement of A will be less than that of B

Q8. Pick up the correct statement from the following:

(A) The first man-made satellite, Sputnik-l’ was launched on 4th October, 1957
(B) The United State’s Explorer 6 transmitted the first picture of the earth in August 1959
(C) Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960
(D) All of these

Q9. If electric permittivity and magnetic permeability of the medium are respectively ‘ε’ and ‘μ’, then the velocity (Cm) of the electromagnetic wave in the medium is given by:

(A) Cm = 1/εμ
(B) Cm = 1/√8 μ
(C) Cm = 5/√εμ
(D) None of these

Answer: (B) Cm = 1/√8 μ

Q10. The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:

(A) 10-10 to 106 m
(B) 10-8 to 106 m
(C) 10-10 to 1010 m
(D) 10-8 to 108 m

Answer: (A) 10-10 to 106 m

Q11. Which one of the following frequency regions is a part of sun’s radiation?

(A) Ultraviolet frequency region
(B) Infrared frequency region
(D) All of these

Q12. The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,

(A) Reduces the contrast of the image and also its sharpness
(B) Increases the contrast of the image but reduces the sharpness
(C) Increases both the contrast and sharpness
(D) Reduces the contrast but increases the sharpness

Answer: (A) Reduces the contrast of the image and also its sharpness

(A) 1, 2, 3
(B) 1, 3
(C) 2, 3
(D) 1, 2

Q14. The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:

(A) Ozone hole
(B) Atmospheric window
(C) Ozone window
(D) Black hole