SSC JE 2019-20: Technical Quiz 22

During the conversion of timber by sawing, in order to obtain strong timber piece, the cuts should be made by

The value of principal stress for the biaxial stress condition given below:

In a Tacheometer fitted with analytical lens, the staff intercept is 2 .7m , the multiplication constant is 98 and line of sight makes an angle of 60° with vertical. What is the horizontal distance between two points?

For an incompressible fluid does density vary with temperature and pressure?

The setting speed of mortar can be increased using:

Find the density of metallic body which floats at the interface of mercury of sp.gr 13.6 and water such that 40 % of its volume is sub-merged in mercury and 60% in water.

Match List-I (Aggregate) with List-II (Effect) and select the correct answer using the codes given below the lists

List-I

A) Rounded aggregates

B) Crushed aggregates

C) Flaky aggregates

D) Irregular aggregates

List-II

1) Reduce workability appreciably because of a high ratio of surface area to volume

2) Require more water than rounded aggregates and give strength lesser than crushed aggregates

3) Give concrete of higher compressive strength due to development of stronger aggregate mortar bond

4) Require lesser amount of water and cement paste for a given workability