The type of steel used for precision levelling staff, is Titanium steel Carbon s

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Question
The type of steel used for precision levelling staff, is
Options
A. Titanium steel
B. Carbon steel
C. Invar
D. Stainless steel.

Correct Answer

Invar

More questions

1. Gauge pressure is
Options
A. absolute pressure - atmospheric pressure
B. absolute pressure + atmospheric pressure
C. atmospheric pressure - absolute pressure
D. none of these.

2. A beam may be designed as a cased beam if
Options
A. section is of double open channel form with the webs not less than 40 mm apart
B. overall depth and width of the steel section do not exceed 750 and 450 mm respectively.
C. beam is solidly encased in concrete with 10 mm aggregate having 28 days strength 160 kg/cm²
D. width of the solid casing is kept at least 100 mm more than the width of the steel flange and having a concrete cover of 50 mm
E. all the above.

3. A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be
Options
A. 0.01 m/sec
B. 0.05 m/sec
C. 1.00 m/sec
D. 1.5 m/see.

4. The cost of the earthwork in excavation for the surface drain of cross-section shown in the given figure for a total length of 5 metres @ Rs. 450% cum, is
Options
A. Rs. 400
B. Rs. 425
C. Rs. 450
D. Rs. 500

5. Pick up the correct statement from the following:
Options
A. The slenderness ratio of lacing bars for compression members should not exceed 145
B. The minimum width of lacing bar connected with rivets of nominal diameter 16 mm, is kept 50 mm
C. The minimum thickness of a flat lacing bar is kept equal to one-fortieth of its length between inner end rivets
D. The angle of inclination of lacing bars and the axis of the members should be between 40° and 70°
E. All the above.

6. The liquidity index is defined as a ratio expressed as percentage of
Options
A. plastic limit minus the natural water content, to its plasticity index
B. natural water content minus its plastic limit to its plasticity index
C. natural water content plus its plastic limit to its plasticity index
D. liquid limit minus the natural water content to the plasticity index.

7. If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is
Options
A. 2 hours
B. 4 hours
C. 6 hours
D. 8 hours.

8. Design of a riveted joint is based on the assumption:
Options
A. Bending stress in rivets is accounted for
B. Riveted hole is assumed to be completely filled by the rivet
C. Stress in the plate in not uniform
D. Friction between plates is taken into account
E. None of these.

10. Pick up the correct statement from the following:
Options
A. The property of a soil that enables it to become stiff in a relatively short time on standing is called thixotropy
B. The ratio of shear strength in natural state to the remoulded shear strength under undrained conditions, is called degree of sensitivity.
C. The difference between the undisturbed shear strength and remoulded shear strength is known remoulding loss
D. The tendency of dense sand to expand on application of shearing load, is known as dilatancy
E. All the above.

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