Elements Of Remote Sensing — Part 2 MCQs with Explanations
Practice high-yield Civil Engineering MCQs on Elements Of Remote Sensing — Part 2 with worked academic solutions for PPSC SDO, FPSC AEE, C&W, Irrigation, NTS.
Questions
39
Difficulty Level
Exam-Level
Target Exams
PPSC SDO, FPSC AEE, C&W...
Estimated Time
47 mins
Exam-Level PPSC SDO FPSC AEE C&W Irrigation NTS
Verified for Commission Syllabus • Oct 14, 2026
39
Verified Practice Questions
Interactive test mode with detailed academic worked solutions
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Question 1 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
In the given figure the phase of
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “In the given figure the phase of”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 2 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Which one of the following helps to identify the objects on the earth surface?
Correct Answer: Option B — Signature
Detailed Academic Explanation:
Signature is the correct answer to “Which one of the following helps to identify the objects on the earth surface”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 3 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called:
Correct Answer: Option B — Active remote sensing
Detailed Academic Explanation:
Active remote sensing is the correct answer to “The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 4 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 5 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Orbital radius of GPS satellites is approximately:
Correct Answer: Option B — 26,600 km
Detailed Academic Explanation:
26,600 km is the correct answer to “Orbital radius of GPS satellites is approximately:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 6 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Spatial variation in horizontal and vertical directions is caused due to:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “Spatial variation in horizontal and vertical directions is caused due to:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 7 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Which one of the following quantities forms the basis of radiometry?
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “Which one of the following quantities forms the basis of radiometry”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 8 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called:
Correct Answer: Option B — Spatial variation
Detailed Academic Explanation:
Spatial variation is the correct answer to “The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 9 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
‘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?
Correct Answer: Option A — Height displacement of A will be less than that of B
Detailed Academic Explanation:
Height displacement of A will be less than that of B is the correct answer to “‘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”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 10 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Leaf reflectance depends primarily on:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “Leaf reflectance depends primarily on:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 11 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The code based GPS receivers are generally used for:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “The code based GPS receivers are generally used for:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 12 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Which one of the following statements regarding remote sensing is correct?
Correct Answer: Option C — Both (A) and (B)
Detailed Academic Explanation:
Both (A) and (B) is the correct answer to “Which one of the following statements regarding remote sensing is correct”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 13 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The object of photo-interpretation is:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “The object of photo-interpretation is:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 14 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The various stages occuring in GPS system are described below: 1. Generation of an output to the user 2. Detection of the GPS signals 3. Processing the data in the built-in-computer 4. Decoding the GPS signal. The correct sequence of the stages is:
Correct Answer: Option C — 2, 4, 3, 1
Detailed Academic Explanation:
2, 4, 3, 1 is the correct answer to “The various stages occuring in GPS system are described below: 1. Generation of an output to the user 2. Detection of the GPS signals 3. Processing the data in the built-in-computer 4. Decoding the GPS signal. The correct sequence of the stages is:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 15 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Pick up the important characteristic of a target which facilitates its identification from the following:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “Pick up the important characteristic of a target which facilitates its identification from the following:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 16 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
'A time varying electric field produces a magnetic field.' This phenomenon is called:
Correct Answer: Option B — Ampere Maxwell's law
Detailed Academic Explanation:
Ampere Maxwell's law is the correct answer to “'A time varying electric field produces a magnetic field.' This phenomenon is called:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 17 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The reflectance from a surface is called specular reflection if it follows:
Correct Answer: Option A — Snell’s law
Detailed Academic Explanation:
Snell’s law is the correct answer to “The reflectance from a surface is called specular reflection if it follows:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 18 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The maximum sun's radiation occurs around:
Correct Answer: Option B — 0.55 μ wave length
Detailed Academic Explanation:
0.55 μ wave length is the correct answer to “The maximum sun's radiation occurs around:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 19 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Critical angle of electromagnetic radiation takes place if
Correct Answer: Option D — Angle of refraction is equal to 90°
Detailed Academic Explanation:
Angle of refraction is equal to 90° is the correct answer to “Critical angle of electromagnetic radiation takes place if”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 20 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The reflection of solar energy is characterized by the water content in the leaf, in the reflective optical infrared:
Correct Answer: Option C — Short wave-IR (1.3 - 2.7 μm) region
Detailed Academic Explanation:
Short wave-IR (1.3 - 2.7 μm) region is the correct answer to “The reflection of solar energy is characterized by the water content in the leaf, in the reflective optical infrared:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 21 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Which one the following is a correct statement?
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “Which one the following is a correct statement”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 22 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Electromagnetic spectrum contains:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “Electromagnetic spectrum contains:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 23 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Earth observations from a satellite platform provide:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “Earth observations from a satellite platform provide:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 24 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:
Correct Answer: Option C — Active sensors
Detailed Academic Explanation:
Active sensors is the correct answer to “The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 25 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
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?
Correct Answer: Option A — 1, 2, 3
Detailed Academic Explanation:
1, 2, 3 is the correct answer to “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”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 26 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Due to scan geometry of a satellite sensor:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “Due to scan geometry of a satellite sensor:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 27 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Coherence of two electromagnetic waves takes place if their phase difference is:
Correct Answer: Option C — Constant in time and space
Detailed Academic Explanation:
Constant in time and space is the correct answer to “Coherence of two electromagnetic waves takes place if their phase difference is:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 28 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The basic requirement of any sensor system is:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “The basic requirement of any sensor system is:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 29 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
A passive sensor uses:
Correct Answer: Option A — Sun as the source of energy
Detailed Academic Explanation:
Sun as the source of energy is the correct answer to “A passive sensor uses:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 30 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within
Correct Answer: Option D — 100 km
Detailed Academic Explanation:
100 km is the correct answer to “DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 31 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Which one of the following residual biases involves the GPS accuracy?
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “Which one of the following residual biases involves the GPS accuracy”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 32 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is:
Correct Answer: Option B — Sun-synchronous orbit
Detailed Academic Explanation:
Sun-synchronous orbit is the correct answer to “For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 33 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:
Correct Answer: Option A — 10-10 to 106 m
Detailed Academic Explanation:
10-10 to 106 m is the correct answer to “The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 34 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:
Correct Answer: Option B — Atmospheric window
Detailed Academic Explanation:
Atmospheric window is the correct answer to “The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 35 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
A reduction of nitrogen nutrient in plants:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “A reduction of nitrogen nutrient in plants:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 36 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Formation of snow occurs if the cloud temperature is
Correct Answer: Option C — Below the freezing point
Detailed Academic Explanation:
Below the freezing point is the correct answer to “Formation of snow occurs if the cloud temperature is”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 37 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is :
Correct Answer: Option D — 24
Detailed Academic Explanation:
24 is the correct answer to “The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is :”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 38 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Which one of the following attributes is not associated with digital maps
Correct Answer: Option D — South arrow
Detailed Academic Explanation:
South arrow is the correct answer to “Which one of the following attributes is not associated with digital maps”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
Question 39 of 39
★ PPSC SDO
★ FPSC AEE
★ PPSC SDO
★ FPSC AEE
Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena:
Correct Answer: Option D — All of these
Detailed Academic Explanation:
All of these is the correct answer to “Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena:”. This question is standard in competitive examination syllabi for Elements Of Remote Sensing.
💡Key Conceptual Anchor:Elements Of Remote Sensing
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In competitive commission exams (FPSC, PPSC, KPPSC, SPSC, CSS, PMS), questions are frequently phrased with distractor options designed to catch rote learners. Whenever you answer an MCQ, read the Detailed Academic Explanation and Conceptual Anchor to understand why the remaining options are incorrect.