सर्भेक्षण – Surveying MCQ

सर्भेक्षण: प्रश्न र उत्तर

सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।

सही: ० / ०

141. In the vector data model of GIS, geographic features are represented as:

     कPoints, lines and polygons defined by coordinates खA regular grid of cells गScanned photographs only घTables without any location
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

142. A 'pseudorange' measured by a GPS receiver is:

     कThe height of the satellite above the geoid खThe exact geometric distance to the satellite गThe distance between two receivers घThe range computed from the signal travel time, which includes the effect of receiver clock error
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

143. A CORS in GNSS surveying is a:

     कClosed Orbit Radar Satellite खCoordinate Origin Reference System used only in maps गContinuously Operating Reference Station that records satellite data at a fixed known point घCorrection for Optical Refraction in Surveying
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

144. In GNSS surveying, 'multipath' error occurs when:

     कThe receiver clock is not synchronised खSatellite signals reach the antenna after reflecting from nearby surfaces such as buildings or water गSatellites are poorly distributed in the sky घThe signal is delayed in the ionosphere
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

145. The three segments of the GPS system are the:

     कSpace, control and user segments खSpace, ground and air segments गSatellite, radio and map segments घTransmitter, receiver and antenna segments
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

146. Earth observation satellites such as Landsat are usually placed in a sun-synchronous orbit so that they:

     कOrbit at the height of GPS satellites खRemain fixed above one point of the equator गAvoid passing over the poles घPass over a given area at the same local solar time, giving similar lighting conditions
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

147. The spatial resolution of a satellite image refers to:

     कHow often the satellite revisits the same place खThe number of spectral bands recorded गThe size of the smallest ground area represented by one pixel घThe number of grey levels a pixel can have
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

148. The Normalised Difference Vegetation Index (NDVI), used in remote sensing to assess vegetation, is computed as:

     क(Red − Blue)/(Red + Blue) ख(NIR − Red)/(NIR + Red) गNIR × Red घ(Green + Blue)/Red
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

149. A vertical aerial photograph of format 23 cm × 23 cm is taken at a scale of 1:10,000. The ground length covered by one side of the photograph is:

     क2.3 km ख23 km ग0.23 km घ10 km
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

150. In aerial photography, 'crab' refers to the condition in which:

     कThe photographs have too little overlap खThe aircraft drifts sideways off the planned flight line because of wind गThe aircraft flies at a varying height घThe edges of the photographs are not parallel to the flight line because the camera is not squared to the direction of travel
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।