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Question 1 of 5
A 20 m chain contains how many links?
A 100
B 150
C 200
D 120
Why: A standard 20 m metric chain has 100 links, each 20 cm long (20 m / 0.2 m = 100 links). This is confirmed by standard chain specifications: Meter chain (20 m) has 100 links of 20 cm each[1]. Option A matches this standard length.
Question 2 of 5
How many kinds of obstacles of chaining are there?
A 2
B 3
C 4
D 5
Why: Obstacles in chaining are classified into three kinds: obstacles to ranging, obstacles to chaining, and obstacles to both chaining and ranging. This classification is standard in chain surveying to address different field challenges[3]. Option B is correct.
Question 3 of 5
While measuring a line between two stations A and B intervened by a raised ground, which of the following is obstructed?
A Vision gets obstructed
B Chaining gets obstructed
C Both vision and chaining get obstructed
D Neither vision nor chaining gets obstructed
Why: A raised ground obstructs both vision (ranging) and chaining, as it blocks line of sight and prevents direct measurement along the line. This is a classic obstacle to both in chain surveying[7][8]. Option C matches.
Question 4 of 5
In chain surveying, fieldwork is limited to:
A Linear measurements only
B Angular measurements only
C Both linear and angular measurements
D All the above
Why: Chain surveying involves only linear measurements using chains or tapes, with angles approximated by right angles or offsets. Angular measurements are not used, distinguishing it from compass or theodolite surveying[7][10]. Option A is correct.
Question 5 of 5
What are the stages of fieldwork in chain surveying?
Why: This follows the standard procedure outlined in surveying texts, ensuring complete coverage of field operations[2]. The answer provides structured steps with example for completeness (approx. 120 words).