Description : A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole? (1) Increase (2) Decrease (3) Remain constant (4) Will increase first and then decrease
Last Answer : (1) Increase Explanation: Assuming the disc is uniform and isotropic (the same in different directions), the hole will expand in the same ratio as the metal. It is because the thermal expansion equation ... is made out of metal. And if the circumference of the hole expands, so does the diameter.
Description : A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ? (1) Increase (2) Dacrease (3) Remain constant (4) Will increase first and then dcrease
Last Answer : Increase
Description : If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated? (1) Increases (2) Decreases (3) Unchanged (4) Depends upon the metal
Last Answer : (1) Increases Explanation: When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter of the circular hole also increases. Using ... of expansions, we find that the hole radius increases at the same linear rate as the metal.
Last Answer : Increases
Description : A copper plate has a circular hole cut in it. If the plate is heated to a higher temperature, the diameter of the hole (a) Becomes smaller (b) Increases (c) Remains constant (d) Increases but the total area of the plate remains constant
Last Answer : Ans:(b)
Description : A metal sheet with circular hole is heated. what change will be in the hole?
Last Answer : It will Expand
Description : 1. Which post does the Constitution of India does not mention? 2. What is the Solar Corona' mainly? 3. Who was a blind poet who worshipped Krishna and spread Krishna Bhakti cult? 4. A ... ? 20. By inserting a soft iron piece into solenoid, what does the strength of the magnetic field?
Last Answer : Answer : 1. The Deputy Prime Minister 2. Consists of molten lava 3. Surdas 4. It will Expand 5. The Bank Note Press, Dewas 6. Kathak 7. Hydrogen 8. Alain khan, the father of Dilawar Khan 9. ... Sarwani 14. 1991 15. 15 16. 46 gram 17. Chinook 18. Painters 19. State Election Commission 20. Increase
Description : What will happen if a sheet of metal with a hole in it is heated?
Last Answer : Need answer
Description : A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling? (1) Circular plate (2) Cube (3) Sphere (4) All will cool at the same rate
Last Answer : (3) Sphere Explanation: In the late of 17th century British scientist Isaac Newton studied cooling of bodies. Experiments showed that the cooling rate is approximately proportional to the difference of temperatures between the heated body and the environment.
Description : A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest? (A) Cube (B) Plate (C) Sphere (D) All will cool at the same rate
Last Answer : (D) All will cool at the same rate
Last Answer : Sphere
Description : If a flat plate with a circular hole is subjected to tensile force, then its theoretical stress concentration factor is? a) 2 b) 3 c) 4 d) 1
Last Answer : b) 3
Description : On heating a circular metallic disc with a circular hole at the centre, the diameter of the hole will (a) decrease (b) remain the same (c) increase (d) first increase, then decrease
Last Answer : Ans:(c)
Description : Pick up the correct statement applicable to plate load test (A) Width of the test pit for plate load test is made five times the width of the plate (B) At the centre of the test pit, a hole is dug ... at the centre of the test pit, is kept at the level of the actual formation (D) All the above
Last Answer : Answer: Option D
Description : When a ring of metal is heated what happens to its hole? (1) expands (2) contracts (3) it expands or contracts according to its diameter (4) it expands or contracts according to its coefficient of expansion
Last Answer : (1) expands Explanation: The hole size will increase because in expansion the size between two molecules, do not increase so when the molecules on the outer edge move outward. Due to expansion, the ... expansion is the tendency of matter to change in volume in response to a change in temperature.
Description : When a ring of metal is heated what happens to its hole ? (1) expands (2) contracts (3) it expands or contracts according to its diameter (4) it expands or contracts according to its coefficient of expansion
Last Answer : expands
Description : The process, whereby electrons gain sufficient energy to be released from the surface of a thin, heated metal plate, is known as _____________. A. photo electric emission B. secondary emission C. thermionic emission D. regressive emission
Last Answer : Answer: C
Description : A small group of people are all standing around a two-foot tall, empty, wooden container. Two women approach the group carrying a silver container, which they place inside the wooden container. No ... circular motions. After this, the top of the silver container is removed, and an objec -Riddles
Last Answer : This group was making home made ice cream using an old fashioned hand-cranked ice cream freezer.
Description : The radius of a circular plate increases by 2% on heating. If its radius is 10 cm before heating, find the approximate increase in its area.
Last Answer : The radius of a circular plate increases by 2% on heating. If its radius is 10 cm before heating, find the approximate increase in its area.
Description : Four equal sized maximum circular plates are cut off from a square sheet of area 784 cm2. What is the circumference of each plate? a) 22 cm b) 44 cm c) 42 cm d) 40cm
Last Answer : b) 44 cm
Description : A copper disc has a hole. If the disc is heated, the size of the hole - (1) increases (2) decreases (3) No change (4) first increases and than decreases
Last Answer : (1) increases Explanation: When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter (sum of two radii) of the circular hole also increases.
Description : A copper disc has a hole. If the disc is heated, the size of the hole (1) increases (2) decreases (3) No change (4) first increases and than decreases
Last Answer : increases
Description : At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical? (A) 1 (B) < 1 (C) > 1 (D) None of these
Last Answer : (A) 1
Description : Air is best heated with steam in a heat exchanger of (A) Plate type (B) Double pipe type with fin on steam side (C) Double pipe type with fin on air side (D) Shell and tube type
Last Answer : (C) Double pipe type with fin on air side
Description : Pick out the wrong statement. (A) In process heat exchangers, saturated steam is preferred over the superheated steam (B) The maximum is the emissive power of a surface at a temperature T1 ... under natural convection conditions, the velocity profile in air, normal to the plate, exhibits a maximum
Last Answer : (B) The maximum is the emissive power of a surface at a temperature T1 occurs at a wavelength of λ1 . If the surface temperature is halved, the maximum in the emissive power would occur at a wavelength of 0.5 λ1
Description : A circular cavity ground out of bedrock by running water is called a: w) cave x) pothole y) sinkhole z) kettle hole
Last Answer : ANSWER: X -- POTHOLE
Description : For an elliptical hole on a flat plate, if width of the hole in direction of the load decrease, Stress Concentration Factor will______ a) Increase b) Decrease c) Remains constant d) Can’t be determined. Varies from material to material
Last Answer : a) Increase
Description : Failure of riveted joints is due to (A) Tearing of the plates between the rivet hole and the edge of the plate (B) Tearing of plates between rivets (C) Shearing of rivets (D) All the above
Last Answer : (D) All the above
Description : Which is an item of storage medium in the form of circular plate? A) Disk B) CPU C) Printer D) ALU
Last Answer : Answer : A
Description : If a circular shaft is welded to the plate by means of circumferential fillet, then the shaft is subjected to torsional moment M. If throat of weld is t, then torsional shear stress is given by a) M/2πtr2 b) M/πtr2 c) M/4πtr2 d) None of the listed
Last Answer : a) M/2πtr2
Description : The ratio of the moment of inertia of a circular plate and that of a square plate for equal depth, is (A) Less than one (B) Equal to one (C) More than one (D) Equal
Last Answer : (D) Equal
Description : From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate (A) 0.5 cm (B) 1.0 cm (C) 1.5 cm (D) 2.5 cm
Last Answer : (A) 0.5 cm
Description : is a circular concave revolving steel plate using for cutting and inverting the soil. a. Gang bolt. c. Disc b. Bearing d. None
Last Answer : Bearing
Description : What is the term used to identify the amount of field strength required to cause the electrons to just miss the plate and return to the filament in a circular orbit?
Last Answer : The critical value of field strength
Description : Which is an item of storage medium in the form of circular plate? a. Disk b. CPU c. Printer d. ALU
Last Answer : a. Disk
Last Answer : d. ALU
Description : Is the singularity at the centre of a black hole subject to quantum effects and would they influence the event horizon?
Last Answer : answer:I don't see how we could know given current methods of measurement. We can't see inside the event horizon because that's the point beyond which light cannot escape. So the event ... speed. Density of mass approaches infinity. Our laws explode in our paces when fed conditions like these.
Description : A uniform solid sphere of radius R has a hole of radius R/2 drilled inside it. One end of the hole is at the centre of the sphere
Last Answer : A uniform solid sphere of radius R has a hole of radius R/2 drilled inside it. One end ... boundary. Locate centre of mass of the remaining sphere.
Description : What would happen if the container did not have a pressure release valve when there is heated lavender flowers in it?
Last Answer : What is the answer ?
Description : What happen with the air in a soccer ball with a cooled and heated?
Last Answer : The air pressure goes down when cooled, goes up when heated. Asoccer ball left outdoors in freezing weather does not have muchbounce. Left outside on a hot day, has a lot of bounce.
Description : When a vessel containing a liquid is heated, the level of liquid initially falls and then rises up. Why does it happen so? OR Describe the irregular expansion of liquid.
Last Answer : On heating the liquid water from 0 degree C to 4 degree C, it contracts so the level of liquid initially falls. But after 4 degree C it expands so liquid rises up.
Description : The tool of an NC machine has to move along a circular arc from (5, 5) to (10, 10) while performing an operation. The centre of the arc is at (10, 5). Which one of the following NC tool path command performs the ... b.N010 GO3 X10 Y10 X5 Y5 R5 c.N010 GO1 X5 Y5 X10 Y10 R5 d.N010 GO2 X5 Y5 X10 Y10 R5
Last Answer : a.N010 GO2 X10 Y10 X5 Y5 R5
Description : n an NC machining operation, the tool has to be moved from point (5, 4) to point (7, 2) alonga circular path with centre at (5, 2). Before starting the operation, the tool is at (5, 4). The G and N codes for this motion ... 0 I5.0 J2.0 c.N010 GO1 X7.0 Y2.0 I5.0 J2.0 d.N010 GOO X7.0 Y2.0 I5.0 J2.0
Last Answer : b.N010 GO2 X7.0 Y2.0 I5.0 J2.0
Description : The moment of inertia of a hollow circular section whose external diameter is 8 cm and interial diameter is 6 cm about the axis passing through its centre is a.66.8 cm4 b.137.5 cm4 c.550 cm4 d.33.4 cm4 e.275 cm4
Last Answer : b. 137.5 cm4
Description : A goat is tethered to one end of a rope of length 20m, while the other end is fixed at the centre of a large circular field. -Maths 9th
Last Answer : (b) 3.5 x 100πThe goat can graze the area CABEODC + quarter circle CDF + quarter circle FEB= \(rac{3}{4}\)x π x (20)2 + \(rac{1}{4}\) x π x (10)2 + \(rac{1}{4}\) x π x (10)2 = 300π + 25π + 25π= 3.5 x 100π.
Description : An electric bulb is hanging above the centre of a circular table of radiys 3m at a height of 3m from the its centre. Find the ratio of illuminance at
Last Answer : An electric bulb is hanging above the centre of a circular table of radiys 3m at a height of 3m from the ... and at a point on the edge of the table.
Description : On meter length of wires carriers a constant current. The wire is bent to from a circular loop. The magnetic field at the centre of this loop is `B`.
Last Answer : On meter length of wires carriers a constant current. The wire is bent to from a circular loop. The magnetic field at ... B. `4B` C. `B/4` D. `16B`
Description : An electron moving in a circular orbit of radius `r` makes `n` rotation per secound. The magnetic field produced at the centre has magnitude
Last Answer : An electron moving in a circular orbit of radius `r` makes `n` rotation per secound. The magnetic field produced at ... (r)` D. `(mu_(0)"ne")/(2r)`