250+ TOP MCQs on Introduction – Chain Survey Equipments and Answers

Surveying Multiple Choice Questions on “Introduction – Chain Survey Equipments”.

1. The simplest instrument used for setting right angles is a _____
a) Cross staff
b) Optical square
c) Prism square
d) Site square
Answer: a
Clarification: The simplest instrument used for setting out the right angles is a cross staff. It consists of either a frame or box with pairs of vertical slits and is mounted on a pole shod for fixing in the ground.

2. Which of the following is not a common form of cross staff?
a) Open cross staff
b) French cross staff
c) Adjustable cross staff
d) German cross staff
Answer: d
Clarification: The common forms of cross staff are open cross staff, french cross staff, adjustable cross staff.

3. Which cross staff consists of two cylinders of equal diameter placed one on top of the other?
a) Open cross staff
b) French cross staff
c) Adjustable cross staff
d) Optical square
Answer: c
Clarification: Adjustable cross staff consists of two cylinders of equal diameter placed one on top of the other. Both are provided with sighting sits. The upper box carries a vernier and can be rotated relatively to lower by a circular rack.

4. Prism square works on the same principle as that of _______
a) Cross staff
b) Open cross staff
c) Optical square
d) Site square
Answer: c
Clarification: It is a modern and precise instrument and is used in a similar manner as that of optical square. It has a merit that no adjustment is required since the angle between the reflecting surfaces cannot vary.

5. What are used to mark the positions of the stations or terminal points of survey line?
a) Arrows
b) Pegs
c) Ranging rods
d) Plumb bob
Answer: b
Clarification: Wooden pegs are used to mark the positions of the stations or terminal points of survey line. They are made of stout timber.

6. Which cross staff consists of two pairs of vertical slits giving two lines of sights at right angles to each other?
a) Open cross staff
b) French cross staff
c) Adjustable cross staff
d) In all types
Answer: a
Clarification: Open cross staff is provided with two pairs of vertical slits giving two lines of sights at right angles to each other.

7. Which cross staff consists of a hollow octagonal box?
a) Open cross staff
b) French cross staff
c) Adjustable cross staff
d) Optical square
Answer: b
Clarification: Adjustable cross staff consists of two cylinders of equal diameter placed one on top of the other. Both are provided with sighting sits. French cross staff consists of a hollow octagonal box.

8. How many number of arrows are required for chain surveying?
a) 10
b) 5
c) 15
d) 20
Answer: a
Clarification: These are among the list of equipment required for chain surveying they are 20 m chain, 10 arrows, ranging rods and offset rods, plumb bob etc.

9. What are used after every chain length measured on the ground?
a) Pegs
b) Ranging rods
c) Arrows
d) Offset rods
Answer: c
Clarification: An arrow is inserted into the ground after every chain length measured on the ground. Wooden Pegs or pegs and offset rods are the survey instruments used in the chaining process in surveying.

10. What can be used in conjunction with a datum rod into the base of the instrument?
a) Cross staff
b) Open cross staff
c) Optical square
d) Site square
Answer: d
Clarification: A site square designed for setting out straight lines and offset lines at 90 degrees. It can be used in conjunction with a datum rod into the base of the instrument.