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MCQ
261. A line joining some fixed points on the main survey lines, is called a-[MES-18]
Line joining some fixed points as a tie station on the main survey line is called as tie line.
check line
baseline
tie line
none of these
262. The instrument attached to the wheel of a vehicle in order to measure the distance travelled, is called-[BADC-18]
passometer
pedometer
odometer
speedometer
263. যে ত্রিভুজায়ন স্টেশনে যন্ত্র বসানো হয় সেখানে নির্মাণ করা হয়-
সিগন্যাল
টাওয়ার
স্কাফোল্ড
কোনোটিই নয়
264. Plane and geodetic surveying are classification of surveying based on : [HED-19]
Plane and geodetic surveying based on the considerations and true shape of the earth. Plane surveying assumes the earth is flat and geodetic surveying the curvature of the earth.
Methodology
Earth's curvature
Object of survey
Instrument
265. What is the length of each link of a 20m long chain? [BREB-17]
চেইন 100 ভাগে ভাগ থাকে 20 x 1000 /100 = 200mm 100
100mm
200mm
300mm
400mm
266. A plain scale is used to read-[BADC-18]
one dimension
two dimension
three dimension
all of these
267. Contour lines cross ridge or valley lines at-[BGFCL-17]
30°
60°
45°
90°
268. স্টেশন বিন্দু নির্বাচনে প্রাধান্য দিতে হয়-
সীমানা
গ্রন্থিরেখা
পরিদৃশ্যতা
আবহাওয়া
269. The error in measured length due to incorrect holding of chain is- [BADC-18]
জরিপকালে শিকলের (ফিতার) দৈর্ঘ্য যদি একবার বাড়ে আবার কমে, অথবা একবার কমে আবার বাড়ে, তাহলে ঐ ধরনের ভ্রান্তিকে ক্ষতিপূরক ভ্রান্তি (Compensative error) বলে।
compensating error
cumulative error
instrumental error
negative error
270. The representative fraction 1/2500 means that the scale is- [BADC-18]
1/2500 means 1 cm = 2500 ст Hence, 1 cm = 25 m
1cm = 0.25m
1cm = 2.5m
1cm = 25m
1cm = 250m
271. When the measured length is less than the actual length, the error is known as-(MOCA-19]
Negative errors (making the measured lengths less than the actual) may be caused because the length of the tape or chain may be greater than the standard because of the wear or flattening of the connecting rings, opening of ring joints, temperature higher than the one at which it was calibrated.
positive erroг
negative error
compensating error
none of these
272. জরিপের প্রারম্ভেই করতে হয়-
স্টেশন বিন্দু নির্বাচন
স্টেশন চিহ্নিতকরণ
পর্যবেক্ষণ জরিপ
পরিমাপ গ্রহণ
273. When 1cm on a map represents 10m on the ground, the representative fraction of the scale is-[MOCA-19]
R.F = = Distance on map Distance on ground 1 cm = 1 1 10 m10×100 cm = 1000 ст
1/10
1/100
1/1000
1/10000
274. কোন জাতীয় জরিপকার্যে পর্যবেক্ষণ জরিপের গুরুত্ব অপরিসীম?
ত্রিভুজায়ন
কিস্তোয়ার
আলোকচিত্র
প্লেন টেবিল
275. The method of measuring distance by pacing is S chiefly used in-[BADC-18]
reconnaissance survey
preliminary survey
location survey
all of these
276. A fixed point reference of known elevation is called-[MES-16, 18/
change point
station point
benchmark
datum
277. An angle between the inclined line of sight and the horizontal is called- [BADC-18]
If the object is below the horizontal, then the angle between the line of sight and the horizontal is called the angle of depression
direct angle
vertical angle
horizontal angle
deflection angle
278. The error in measured length due to sag of chain or tape is known as--[BADC-18]
The error in measured length due to careless holding of chain is cumulative error. When the pull applied while measuring with a tape, is more than the standard pull for that tape, the error in measured length is positive.
positive error
negative error
compensating error
instrumental error
279. জরিপ এলাকার সমতল ভূমির ওপর নির্বাচিত দীর্ঘ রেখার নাম-
ভিত্তিরেখা
শিকল রেখা
গ্রন্থিরেখা
যাচাই রেখা।
280. In an optical square, the angle between the first incident ray and the last reflected ray is- [MES-18, MOCA-19]
অপটিক্যাল স্কয়ারের First incident ray last incident ray-এর মধ্যবর্তী কোণের মান 90°।
60°
90°
120°
150°