Maximum permissible wear in stones for road work is
A good brick Earth can be rolled without breaking in small thread of diameter
As per plastic limit, thead of soil can be rolled in 3mm without crumbling
Fat lime is used for best performance in
Fate lime is 95% pure lime having 5% impurity only. Used for whitewashing and plastering work
Which of the following grades of concrete in RCC is recommended for severe exposure
RCC Exposure Condition as per IS 456:2000 Mild M20 300 kg cement 0.55 w/c Moderate M25 300 kg cement 0.50 w/c Severe M30 320 kg cement 0.45 w/c Very Severe M35 340 kg cement 0.45 w/c Extreme M40 360 kg cement 0.40 w/c
Which of the following minerals has more than 50% share in rapid hardening cement
C3S responsible for initial strength and C2S for longterm strength. C3A has highest energy of heat of hydration and C4AF has highest rate of heat of hydration
Which of the following range of pigment volume concentration number is recommended for paint for prime coat on metal
PVCN = V1/(V1+V2) V1 = Pigment volume V2 = Other Volatile matter 25-40 for Prime coat on metal 28-40 for Exterior 35-40 for wooden 45-50 for semi-Gloss 50-70 for Flite Color
The best season for felling of trees of timber production in hilly area
Felling of tree for timber production: Hilly - Summer Plain - Winter
Which of the following Indian Standard is referred to determine zone of fine aggregate
A dummy activity in a project network does not consume
Dummy activity does not consume time and resources
In a CPM network latest finish time for an event 1 is 10 weeks. Activity i-j takes 4 weeks for completion. Event J starts after 16 weeks. Float for activity i-j is
Network = Event I + Activity i j + Event J Event J starts at 16 weeks Activity i j takes 4 weeks Event I takes 10 weeks so total float = 16-10-4 = 2 weeks
Surface tension is due to
Surface tension is due to Cohesion only. (Same type of material bonding) Capillary action is due to Cohesion & adhesion. Capillary rise if Adhesion>cohesion
The absolute pressure is equal to
P(absolute) = P(atm)+ P(gauge)
The centre of gravity of the volume of the liquid displaced is called
Buoyancy in fluid is upward force equal to weight of fluid displaced. Metacentre is a point about which body oscillates when tilted.
Which of the following function represent the velocity potential of a function
if Φ exist, flow should irrotational (w=0) if Φ satisfy laplance eqn then possible steady incompressible flow.
Which of the following pressure units represent the least pressure
1 N/mm2 Kgf/cm2 = 0.098 N/mm2 1 millibar = 0.0001 N/mm2 1 mm of mercury = 0.0001332 N/mm2
The reading of Differential manometer of a Venturimeter placed at 45 ° to the horizontal is 11 cm. If the eventual venturimeter is turned to horizontal position, the manometer reading will be
Doesn't effect of inclined angle, remained same 11 cm.