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How many types of cross staff are available?

How many types of cross staff are available? Correct Answer 3

The three types are open cross staff, French cross staff and adjustable cross staff. Open cross staff has two vertical, opposite slits. French cross staff consists of a hollow octagonal box. The adjustable cross staff consists of two cylinders of equal diameter, one placed on top of the other.

Related Questions

Match the following, in the context of the leveling staff. a. Self-reading staff 1. The smallest division is 5 mm. its length is about 3 metres. b. Solid Staff 2. It has a moving target against which readings are taken by the staff man. The sliding target comes along with the vernier. c. Telescopic Staff 3. The readings are always taken from the telescope hence appear inverted. Therefore, readings are taken from downwards. d. Target staff 4. It has three telescopic lengths of 1.5, 1.5, and 2 meters when stretched out fully. Normally, its total length is 5 metres
Directions : In each of the following questions a statement is given, followed by three conclusions. Give answer :

Statement : "As our business is expanding, we need to appoint more staff." Owner of a company informs his staff.

Assumptions :
I. The present staff is not competent.
II. More staff will further expand the business.
III. Suitable persons to be taken as staff will be available.
Jagan Bhai is a famous decorator and caterer. His two male staff and four females staff members can complete a work in 6 days, while one male staff and five female staff members can finish the same work in 8 days. Find the number of days in which 8 female staff members can complete the same task? 
In an international school, 60% of the staff is of teachers and 40% of teachers are earning more than Rs.37,325. If 50% of the school's staff earn more than Rs.37,325 per year, then find which statement is correct. a) Percentage of administrative staff earn Rs.37,325 or less per year is less than 30%. b) Percentage of administrative staff earn Rs.37,325 or less per year is more than 30%. c) Percentage of administrative staff earn Rs.37,325 or less per year is exactly 30%. Select the correct answer.
Examine the following statements on the line and staff and identify the ones which are true.
1. Line and staff concept originated from Military.
2. Line decides and staff assists.
3. Personnel role is performed both by line and staff.
4. The Personnel Department's role is a staff function.
Four staff members at a certain company worked on a project. The amounts of time that the furn staff members worked on the project were in the ratio 2 to 3 to 5 to 6 If one of the four staff members worked o the project for 30 hours, which of the following CANNOT be the total number of hours that the for staff members worked on the project?
Four staff members at a certain company worked on a project. The amounts of time that the furn staff members worked on the project were in the ratio 3 to 4 5 to 6 . If one of the four staff members worked on the project for 60 hours, which of the following CANNOT be the total number of hours that the four staff members worked on the project ?
The following are the staff readings given when the staff is held normal. The line of sight of instrument is placed at an angle +3024ꞌ. It being an anallactic lens, find the horizontal distance between staff and instrument station. Staff readings – 2.145 m, 1.925 m, 1.464 m.
In an office, 40% of the staff is female. 70% of the female staff and 50% of the male staff are married. The percentage of the unmarried staff in the office is :
Four friends A, B, C and D need to cross a bridge. A maximum two persons can cross it at a time. It is night and they just have one lamp. Persons that cross the bridge must carry the lamp to find the way. A pair must walk together at the speed of slower person. After crossing the bridge, the person having faster speed in the pair will return with the lamp each time to accompany another person in the group. Finally, the lamp has to be returned at the original place and the person who returns the lamp has to cross the bridge again without lamp. To cross the bridge, the time taken by them is as follows: A :1 minute, B : 2 minutes, C : 7 minutes and D : 10 minutes. What is the total minimum time required by all the friends to cross the bridge?