Description : Differentiate between retarding and accelerating admixtures with following points. i) Hydration process ii) Setting time iii) Weather condition iv) Use
Last Answer : The accelerating and retarding admixtures can be compared as follows. Accelerating Admixture Retarding Admixture Hydration process Due to accelerating admixture, hydration process completes ... where slow hardening of concrete is necessary i.e. in mass concrete structures.
Description : ick up the incorrect statement from the following: (A) Admixtures accelerate hydration (B) Admixtures make concrete water proof (C) Admixtures make concrete acid proof (D) Admixtures give high strength
Last Answer : Answer: Option A
Description : Admixtures which cause early setting and hardening of concrete are called (A) Workability admixtures (B) Accelerators (C) Retarders (D) Air entraining agents
Last Answer : Answer: Option B
Description : State two disadvantages of air entraining admixtures.
Last Answer : Disadvantages of air entraining admixtures: 1.Porosity of the concrete mass increases the chances of honeycombing. 2.The density of concrete i.e. unit weight decreases. 3.Workability of concrete increases but strength of concrete decreases up to certain extent.
Description : According to IS: 456-2000, the maximum cement content exclusive of admixtures is [ A ] 200 kg/m3 [ B ] 300 kg/m3 [ C ] 450 kg/m3 [ D ] 550 kg/m3
Last Answer : [ C ] 450 kg/m3
Description : According to IS:456 minimum cement content inclusive of admixtures is [ A ] 200 kg/m3 [ B ] 300 kg/m3 [ C ] 450 kg/m3 [ D ] 550 kg/m3
Last Answer : [ B ] 300 kg/m3
Description : Two dimensional motion is not always projectile motion . in two -dimensional motion that is not projectile motion , ____ is not accelerating the objective?
Last Answer : Gravity
Description : Can American conservatism cope In an era defined by by rapidly accelerating change?
Last Answer : Yes. Their will be greater and greater pushback.
Description : Car has vvvvrrrrrrrrrrrrr sound when I first start accelerating?
Last Answer : answer:I can’t see how replacing a head gasket would cause your weird noise unless they did something to your carburetor. Perhaps the sound is coming from your transmission? It might just be a coincidence that now your transmission is having a problem(s). God luck!
Description : What causes a car engine to whistle upon accelerating?
Last Answer : Not a mechanic…but it could be that your fan belt needs tightening
Description : Is evolution accelerating or are my eyes just getting older?
Last Answer : Blame the age of technology for this (as well as the child's opportunity to express him/herself).. When you were growing up there wasn't many things to do to open your analytic imagination ( ... level of intelligence will be the only way that our heirs and their heirs will become space voyagers..
Description : A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating ... inclined plane, while another identical block B is released for free fall from the same height e.decelerating
Last Answer : a. moving at constant velocity
Description : Under which circumstances will have zero velocity and be still accelerating? a.The bob of a simple pendulum when at its mean position b.107 dynes c.A steamer while taking a turn d.A ball at its highest point of its rise when thrown up e.Tyres of a stationary automobile
Last Answer : d. A ball at its highest point of its rise when thrown up
Description : In which case power required would be more a.In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec b.In lowering a weight of 100 kg along an a inclined plane ... speed of 3 m/sec e.In lowering the weight at a velocity of 3 m/sec and acceleration of 1 m/sec2
Last Answer : a. In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec
Description : A flywheel starting from rest and accelerating uniformly performs 25 revolutions in 5 sec. Its angular velocity in rpm after 10 seconds would be a.50 rpm b.20 rpm c.25 rpm d.60 rpm e.45 rpm
Last Answer : b. 20 rpm
Description : Evaluate the role of large scale development projects in accelerating the loss of forests in india -SST 10th
Last Answer : 'This answer was deleted by our moderators...
Description : Why the Archimedes' principle is not valid in case of an elevator accelerating upwards but it is valid for a car accelerating on a level road?
Last Answer : Need answer
Description : Is the moon accelerating when it revolves around earth at a fairly constant speed?
Description : A person weighs more in a lift, which is (a) moving up with a constant velocity (b) moving down with a constant velocity (c) accelerating upward (d) accelerating downward
Last Answer : Ans:(c)
Description : An atomic pile is used for – (1) producing X-rays (2) conducting nuclear fission (3) coducting thermonuclear fusion (4) accelerating atoms
Last Answer : (2) conducting nuclear fission Explanation: An atomic pile is a nuclear reactor that uses controlled nuclear fission to generate energy. The most common reactor consists of a large assembly of graphite (an allotropic form of carbon) blocks having rods of uranium metal (fuel).
Description : An object is in static equilibrium when it is _____. (1) at rest (2) moving in a circular path (3) moving with uniform velocity (4) accelerating at high speed
Last Answer : (1) at rest Explanation: When forces acting on an object which is at rest are balanced, the object is said to be in a state of static equilibrium. The resultant of these forces equals zero.
Description : An object is in static equilibrium when it is _______. (1) at rest (2) moving in a circular path (3) moving with uniform velocity (4) accelerating at high speed
Last Answer : (1) at rest
Description : The full load torque of an electric motor is the __________. A. minimum torque developed by the motor accelerating from stop to full speed B. turning moment exerted by the motor at rated load ... and frequency D. turning moment exerted by the motor from any rotor angular position at any load
Last Answer : Answer: B
Description : Reduced voltage applied to a motor during the starting period will _____________. A. result in decreased acceleration time only B. lower the starting current and increase accelerating time C. cause a greater starting torque D. increase the starting current and pump capacity
Description : Research reactors are normally meant for (A) Producing high neutron flux 10 12 -10 13 neutrons/cm2 , sec and studying the effect of neutron bombardment on different materials (B) Accelerating the neutrons (C) Power generation (D) None of these
Last Answer : (A) Producing high neutron flux 10 12 -10 13 neutrons/cm2 , sec and studying the effect of neutron bombardment on different materials
Description : Use of molten metal as a coolant in fast breeder reactor helps in (A) Rapid heat transfer from the core (B) Accelerating the reaction rate in the core (C) Breeding neutrons (D) Accelerating the neutrons
Last Answer : (A) Rapid heat transfer from the core
Description : . In filtration, the use of 'filter aid' helps in (A) Reducing the filtration pressure (B) Accelerating the rate of filtration (C) Deplugging the filter medium (D) Enhancing the cake porosity in case of a dense impermeable cake
Last Answer : (C) Deplugging the filter medium
Description : By accelerating the magnet inside the coil, the current in it A. increases B. decreases C. remains constant D. reverses
Last Answer : increases
Description : In a spring-mass system, which of the following force is not considered? A Spring force B Damping force C Accelerating force D A and B
Last Answer : B Damping force
Description : In a spring-mass system, which of the following force is not considered? B ( A ) Spring force ( B ) Damping force ( C ) Accelerating force ( D ) A and B
Last Answer : B ) Damping force
Description : n which direction does the accelerating force acts? a) Opposite to the motion b) Along the motion c) Perpendicular to motion d) Variable
Last Answer : b) Along the motion
Description : Presence of SO2 in furnace gases attacks the ferrous metal by way of (A) Accelerating the rate of scaling (B) Causing metal embrittlement (C) Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Boundary layer separation is characterised by one of the conditions given below, where 'Re' is the Reynolds number for the flow. Select the appropriate conditions. (A) Re > 1, accelerating flow (C) Re >1, decelerating flow
Last Answer : (D) Re >>1, decelerating flow
Description : Pascal law is not applicable for a/an __________ fluid. (A) Accelerating frictionless (B) Static (C) Uniformly moving (D) None of these
Last Answer : (D) None of these
Description : Nitrogenous fertiliser is required (A) During the early stage of growth to promote development of stem andleaves (B) For accelerating fruit formation in later stage of growth (C) To lessen the effect of excessive potash application (D) None of these
Last Answer : (A) During the early stage of growth to promote development of stem andleaves
Description : The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is __________ fertiliser. (A) Nitrogenous (B) Phosphatic (C) Potassic (D) None of these
Last Answer : (A) Nitrogenous
Description : A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called (A) Pascal's law (B) (C) D-Alembert's principle (D) None of these
Last Answer : Answer: Option C
Description : The hyperboloid shape also aids in accelerating the upward convective air flow, improving ________ efficiency. • Performance • Cooling • Heating • All of the above
Last Answer : cooling
Description : The hyperboloid shape also aids in accelerating the upward convective air flow, improving __________ efficiency. a. Heating b. Warming c. Cooling d. Cold
Last Answer : c. Cooling
Description : Range of accelerating factor is a) 50 to 100 b) 1.3 to 1.7 c) 1 to 10 d) 10.8 to 11.2
Last Answer : b) 1.3 to 1.7
Description : The wavelength of the wave associated with the moving object is a) Directly proportional to the accelerating voltage b) Directly proportional to the square of accelerating voltage c) ... proportional to the square root of accelerating voltage d) Inversely proportional to the accelerating voltage
Last Answer : c) Inversely proportional to the square root of accelerating voltage
Description : For a body to be in equilibrium, which of the following conditions must exist? w) no forces may be acting on the body. x) the body must be accelerating. y) the velocity of the body must be zero. z) the sum of the forces acting on the body must be equal to zero.
Last Answer : ANSWER: Z -- THE SUM OF THE FORCES ACTING ON THE BODY MUST BE EQUAL TO ZERO.
Description : A car traveling at a constant velocity of 20 meters per second passes a second car which is initially at rest. The car which was at rest starts accelerating at 10 meters per second squared the instant it is passed ... car. They will meet again in: w) 2 seconds x) 4 seconds y) 6 seconds z) 8 seconds
Last Answer : ANSWER: X -- 4 SECONDS
Description : The equation, X = A cos(wt + f) (read: X equals A times the cosine of omega t + phi (fee)), can represent an expression for: w) accelerating due to gravity x) uniform straight line motion y) dc current z) a simple harmonic oscillator
Last Answer : ANSWER: Z -- A SIMPLE HARMONIC OSCILLATOR
Description : A pendulum which is suspended from the ceiling of a railroad car is observed to hang at an angle of 10 degrees to the left of vertical. Which of the following answers could explain this phenomena? w ... is moving with constant velocity to the right. z) The railroad car is accelerating to the right.
Last Answer : ANSWER: Z -- THE RAILROAD CAR IS ACCELERATING TO THE RIGHT.
Description : A pendulum which is suspended from the ceiling of a railroad car is observed to hang at an angle of 10 degrees to the right of vertical. Which of the following answers could explain this phenomena? ... is moving with constant velocity to the right. z) The railroad car is accelerating to the right.
Last Answer : ANSWER: X -- THE RAILROAD CAR IS ACCELERATING TO THE LEFT.
Description : An atomic pile is used for (1) producing X-rays (2) conducting nuclear fission (3) coducting thermonuclear fusion (4) accelerating atoms
Last Answer : conducting nuclear fission
Description : Draw indicator diagram for reciprocating pump showing the effect of accelerating head and frictional head.
Last Answer : Draw indicator diagram for reciprocating pump showing the effect of accelerating head and frictional head.