Description : The coefficient of friction depends on?
Last Answer : The coefficient of friction depends on nature of surface.
Description : What is Friction?
Last Answer : Friction is the force that opposes the relative motion or tendency to such motion of two bodies in contact. If we try to push a block of wood across a table, there are two opposing forces ... table) the object moves further and further before stopping. This demonstrates Galileo's law of inertia too.
Description : We often sprinkle talcum powder on the carom board . This is done to reduce ______ between the board and the striker. a) friction b)movement c)speed d)contact
Last Answer : a) friction
Description : ________ is a substance that can reduce the force of friction between the two surface in contact. a) lubricant b)paste c)water d)push
Last Answer : a) lubricant
Description : Air resistance ______ with an increase in the speed of the object moving through it. a) increases b)decreases c)remains same d)no change
Last Answer : a) increases
Description : A ball bearing is used in shafts of motors, dynamos to reduce ______. a) movement b)friction c)speed d)none
Last Answer : b)friction
Description : The skidding of vehicle on snow is because of very little _______. a) pull b)friction c)push d)none
Description : Write two advantages and two disadvantages of friction.
Last Answer : They change the direction of the objects They change the size of the objects
Description : Describe with neat diagram air friction damping.
Last Answer : Air Friction Damping: Here air trapped in the chamber works as damping medium for the piston movement connected to the spindle. The piston moves in the air chamber. The clearance between piston and ... will be the damping torque, bringing the pointer to the equilibrium position quickly.
Description : The friction losses in Real Transformers are : (A) 0% (B) 5% (C) 25% (D) 50%
Last Answer : A
Description : Kinetic friction is the?
Last Answer : Kinetic friction is the friction force acting when the body is in motion.
Description : Tangent of angle of friction is equal to?
Last Answer : Tangent of angle of friction is equal to coefficient of friction.
Description : Dynamic friction as compared to static friction is?
Last Answer : Dynamic friction is less compared to static friction.
Description : Coulomb friction is the friction between?
Last Answer : Coulomb friction is the friction between bodies having relative motion.
Description : Limiting force of friction is the?
Last Answer : Limiting force of friction is the friction force acting when the body is just about to move.
Description : Coefficient of friction is the?
Last Answer : Coefficient of friction is the ratio of limiting friction and normal reaction.
Description : On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be?
Last Answer : On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be zero at its upper end.
Description : On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be?
Last Answer : On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be upwards at its upper end.
Description : The ratio of limiting friction and normal reaction is known as?
Last Answer : The ratio of limiting friction and normal reaction is known as coefficient of friction.
Description : Angle of friction is the?
Last Answer : Angle of friction is the angle between normal reaction and the resultant of normal reaction and the limiting friction.
Last Answer : The normal value of adhesion friction is 0.25.
Last Answer : The friction at the track is proportional to speed.
Description : If we want to calculate the pressure of a liquid at the bottom of a vessel, the quantity which is not required to determine it, is – (1) Height of the liquid column (2) Surface area of the bottom of the vessel (3) Density of the liquid (4) Acceleration due to gravity at the bottom of the vessel
Last Answer : (2) Surface area of the bottom of the vessel Explanation: The pressure exerted by a static fluid depends only upon the depth of the fluid, the density of the fluid, and the acceleration of gravity. Static fluid pressure does not depend on the shape, total mass, or surface area of the liquid.
Last Answer : (2) Surface area of the bottom of the vessel Explanation: The pressure exerted by a static fluid depends only upon the depth of the fluid, the density of the fluid, and the acceleration of gravity.
Description : If we want to calculate the pressure of a liquid at the bottom of a vessel, the quantity which is not required to determine it, is (1) Height of the liquid column (2) Surface area of the bottom of the vessel (3) Density of the liquid (4) Acceleration due to gravity at the bottom of the vessel
Last Answer : Surface area of the bottom of the vessel
Description : Pressure exerted by a liquid depends upon its (A) Surface tension (B) Density (C) Viscosity
Last Answer : Option B
Description : Natural draught produced by a chimney depends upon the (A) Density of the chimney gases (B) Height of the chimney (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : The buoyancy depends upon the (A) Weight of the liquid displaced (B) Pressure with which the liquid is displaced (C) Viscosity of the liquid (D) Compressibility of the liquid
Last Answer : Answer: Option A
Description : The boiling point of water depends upon the – (1) atmospheric pressure (2) volume (3) density (4) mass
Last Answer : (1) atmospheric pressure Explanation: The boiling point corresponds of water to the ternperature at which its vapour pressure equals the surrounding environmental pressure. So it is dependent on ... pressure decreases. As this pressure decreases, the boiling point of the water also decreases.
Description : The boiling point of water depends upon the (1) atmospheric pressure (2) volume (3) density (4) mass
Last Answer : atmospheric pressure
Description : The coefficient of discharge for an external mouthpiece depends upon (A) Velocity of liquid (B) Pressure of liquid (C) Area of mouthpiece (D) Length of mouthpiece
Last Answer : Answer: Option D
Description : Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their (A) Viscosity (B) Density (C) Solubility (D) Relative volatility
Last Answer : (C) Solubility
Description : Pick up the correct statement from the following: (A) For the same feature, the photograph taken from the satellite vertically above the aircraft, the height displacement is lesser than the aerial photograph ... C) The feature at the principal point has no height displacement (D) All of the above
Description : Assume that the speed (v) of sound in air depends upon the pressure (P) and density (ρ) of air, then use dimensional analysis to obtain
Last Answer : Assume that the speed (v) of sound in air depends upon the pressure (P) and density (ρ) ... analysis to obtain an expression for the speed of sound.
Description : The penetration of x-rays through an object depends upon the object’s _____. A. Density B. Shape C. Pressure D. Size
Last Answer : ANSWER: A
Description : The capacity of a pneumatic conveying system depends upon the (A) Bulk density of materials (B) Pressure of the conveying air (C) Diameter of the conveying line (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Pressure in fluid depends upon A. depth below the surface B. density of fluid C. the value of g D. all of above
Last Answer : all of above
Description : The shearing strength of a cohesion-less soil depends upon (A) Dry density (B) Rate of loading (C) Confining pressure (D) Nature of loading
Last Answer : Answer: Option C
Description : E.M.F for a coil depends upon A. the cross sectional area B. no. of turns of wire C. the magnitude of magnetic flux density D. all of above
Description : In an operating distillation column, the (A) Vapors and liquids are at their dew point and bubble point respectively (B) Driving force for the liquid flow is its specific weight (C) Driving force for ... bottom to the top of the column (D) Highest temperature is encountered at the top of the column
Last Answer : (C) Driving force for the vapor flow is the pressure drop, as the pressure decreases gradually from the bottom to the top of the column
Description : In a counter-current liquid extractor (A) Both liquids flow at fixed rate (B) Both liquids can have any desired flow rate (C) Only one of the liquids may be pumped at any desired rate (D) Liquid’s flow rate depends upon the temperature and pressure
Last Answer : (C) Only one of the liquids may be pumped at any desired rate
Description : Pick out the wrong statement: (A) Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer (B) Blowers develop a maximum pressure of 2 atmospheres ( ... factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number
Last Answer : (C) Friction losses in pipe fittings are generally expressed in terms of velocity heads
Description : The pressure of the liquid flowing through the divergent portion of a Venturimeter (A) Remains constant (B) Increases (C) Decreases (D) Depends upon mass of liquid
Description : A column has moment of inertia about X-X and Y-Y axis as follows IXX=4234.4 mm4 IYY=236.3 mm4 This column will buckle about (a) X-X axis (b) Y-Y axis (c) It depends upon the applied load (d) None of these
Last Answer : (b) Y-Y axis
Description : Unpaid postage abstract is a record in form______-which is to be maintained by every_____ and_______to record the _______of unpaid articles a) MS-88, Account office, Circle account office, registered b) ... office, receipt and dispatch d) ACG 45, Account office, Head office, receipt and dispatch
Last Answer : c) ACG 45 , Head office and sub office, receipt and dispatch
Description : The _______of an office must daily examine the condition of the locks of the main doors leading into the office and at least once a _____that of the locks of the boxes, etc., in the office and note the ... the error book c) Officer in charge, Daily, Order book or in the error book d) None of these
Last Answer : b) Officer in charge, Month, Order book or in the error book
Description : The network layer encapsulates the data into _______of data. A. bits B. frames C. packets D. bytes
Last Answer : C. packets
Description : Set of L-dimensional blocks called the _______of the vector quantizer. a. Group b. Codebook c. Coding d. Index
Last Answer : b. Codebook
Description : Centre of pressure in an immersed body is __________ the centre of gravity. (A) Above (B) Below (C) At (D) Either above or below; depends on the liquid density
Last Answer : (B) Below
Description : Liquid A and liquid B exert same amount of pressure on each other, but the density of A is twice the density of B. The height of liquid B is 10 cm, then the height of liquid A would be A. 5 cm B. 10 cm C. 20 cm D. 40 cm
Last Answer : 5 cm