Description : Water gets evaporated from water surfaces and land surfaces, get converted into water drops at lower temperatures, flows over ground surface and finally meets its source, i.e. lake, sea, etc. This ... Hydrological cycle (B) Water cycle (C) Evaporation and precipitation cycle (D) All the above
Last Answer : (D) All the above
Description : The water in an open pond remains cool even in hot summer because (a) Of continuous evaporation of water (b) Water radiates heat more rapidly than the atmosphere (c) Water absorbs heat less rapidly than the atmosphere (d) Water absorbs heat more rapidly than the atmosphere
Last Answer : Ans:(c)
Description : What type of heat transfer is affected by the colour of surfaces?
Last Answer : Need answer
Description : What type of surfaces absorbs heat?
Last Answer : Dark, rough, and/or porous surfaces absorb the most heat (ex.Asphalt)
Description : Choose the most important factor on which the heat conducted through a wall in a unit time will depend on? (A) Thickness of the wall (B) Area of the wall perpendicular to heat flow (C) Material of the wall (D) Temperature difference between the two surfaces of the wall
Last Answer : (D) Temperature difference between the two surfaces of the wall
Description : Fourier's law of heat conduction applies to __________ surfaces. (A) Isothermal (B) Non-isothermal (C) Both (A) and (B) (D) Neither (A) and (B)
Last Answer : (C) Both (A) and (B)
Description : Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that (A) There is no internal heat generation (B) Boundary surfaces are isothermal (C) Material is anisotropic (D) Constant temperature gradient exists
Last Answer : (C) Material is anisotropic
Description : The overall heat transfer co-efficient for a shell and tube heat exchangerfor clean surfaces is U0 = 400 W/m2 .K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m2 .K. The overall heat transfer coefficient ... 1200 W/m2 .K (B) 894 W/m2 .K (C) 333 W/m2 .K (D) 287 W/m2 .K
Last Answer : (C) 333 W/m2 .K
Description : Pick out the wrong statement. (A) Heat transfer from a hot body to cold body by the emission of heat waves is called radiation (B) Filmwise condensation takes place on non-wettable surfaces (C) The ... of a solution is affected by liquid head as well as boiling point elevation (D) None of these
Last Answer : (B) Filmwise condensation takes place on non-wettable surfaces
Description : How much surfaces does the earth have?
Last Answer : the surface of the moon is 0.074 of earth's surface area
Description : Which one of the following surfaces will give highest coefficient of traction while using crawler track tractors? (A) Ice (B) Concrete (C) Loose sand (D) Earth
Last Answer : (D) Earth
Description : Which of the following surfaces will give highest rolling resistance for a rubber tyred vehicle? (A) Concrete (B) Loose sand (C) Asphalt (D) Firm earth
Last Answer : (B) Loose sand
Description : Imagine that a 20 mile diameter hole is bored along the diameter of the Earth extending from the North Pole to the South Pole, that all air and gases are pumped out of this hole, and that the temperature ... between the loci of the hole with the opposite surfaces of the Earth. z) none of the above.
Last Answer : ANSWER: Y -- FOREVER OSCILLATE IN SIMPLE HARMONIC MOTION ALONG THE OLE
Description : Pick up the incorrect statement from the following: (A) Tricalcium silicate (C3S) hydrates rapidly (B) Tricalcium silicate (C3S) generates more heat of hydration (C) Tricalcium silicate (C3S) develops early strength (D) Tricalcium silicate (C3S) has more resistance to sulphate attack
Last Answer : Answer: Option D
Description : Dicalcium silicate a) Hydrates rapidly b) Generate less heat of hydration* c) Hardens rapidly d) Reacts with water only
Last Answer : b) Generate less heat of hydration*
Description : A hot body will radiate heat most rapidly, if its surface is (A) White & rough (B) Black & rough (C) White & polished (D) Black & polished
Last Answer : (B) Black & rough
Description : Consider the following four conditions (1 - 4) and select a correct pair of them as adaptations to environment in desert lizards. Conditions: 1. Burrowing in soil to escape high temperature. 2. Losing heat rapidly from the body during ... to thick fatty dermis. (a) 3, 4 (b) 1, 3 (c) 2, 4 (d) 1, 2
Last Answer : (b) 1, 3
Description : Di-calcium silicate (C2S) (A) Hydrates rapidly (B) Generates less heat of hydration (C) Hardens rapidly (D) Provides less ultimate strength to cement
Last Answer : Answer: Option B
Description : The presence of tricalcium silicate in cement (a) Hydrates the cement rapidly (b) Generates less heat of hydration. (c) Offer high resistance to sulphate attack (d) All of these
Last Answer : (a) Hydrates the cement rapidly
Description : Dicalcium silicate (C2S) [ A ] rates rapidly [ B ] Hardens rapidly [ C ] Generates less heat of hydration [ D ] Has less resistance to sulphate attack
Last Answer : [ C ] Generates less heat of hydration
Description : The pole star does not seem to move because (a) it is in line with the earth’s axis of rotation (b) it moves around the sun and not the earth (c) its movement can be seen only during a solar eclipse (d) it rotates very rapidly
Last Answer : Ans:(a)
Description : Pulsars are : (1) stars moving towards the Earth (2) stars moving away from Earth (3) rapidly spinning stars (4) high temperature stars
Last Answer : (3) rapidly spinning stars Explanation: Pulsars are celestial objects, thought to be rapidly spinning stars, that emits regular pulses of radiowaves and other electromagnetic radiation at the rate of upto one thousand pulses per second.
Description : Pulsars are – (1) stars moving towards the Earth (2) stars moving away from Earth (3) rapidly spinning stars (4) high temperature stars
Last Answer : (3) rapidly spinning stars Explanation: The word "pulsar" is a contraction of "pulsating star. A pulsar is formed when a massive star collapses exhausts its supply of fuel. It blasts out ... an object composed primarily of neutrons packed so tightly that they no longer exist as normal matter.
Last Answer : (3) rapidly spinning stars Explanation: Pulsars are celestial objects, thought to be rapidly spinning stars, that emits regular pulses of radio waves and other electromagnetic radiation at the rate of upto one thousand pulses per second.
Description : A pulsar is a rapidly spinning neutron star which emits: A. A blinding light when it aligns with the planets B. Radio waves detectable from Earth (Answer) C. A gravitational pull which attracts high energy dust particles D. Enough energy to power itself indefinitely
Last Answer : B. Radio waves detectable from Earth (Answer)
Description : Pulsars are (1) stars moving towards the Earth (2) stars moving away from Earth (3) rapidly spinning stars (4) high temperature stars
Last Answer : rapidly spinning stars
Description : Community water fluoridation MOST effectively achieves: a. 90. 95% reduction of caries. b. 45. 55% reduction of caries. Esta se corrects si no tuviera la ultima opcion c. Reduces pit and fissures caries more than smooth surfaces. d. Reduces smooth surfaces more than pit and fissures.
Last Answer : d. Reduces smooth surfaces more than pit and fissures.
Description : Community water fluoridation MOST effectively achieves is:** A. 90-95% reduction of caries B. 45-55% reduction of caries C. Reduces pit and fissures caries more than smooth surfaces D. Reduces smooth surfaces more than pit and fissures
Last Answer : D. Reduces smooth surfaces more than pit and fissures
Description : During maintenance of circuit breakers, _______________. A. always smooth roughened contact surfaces with a file B. never pass more than rated breaker current through the overload heater element C. ... wear and misalignment of main contacts D. assume heater elements installed are of correct size
Last Answer : Answer: C
Description : There is an island with exactly 201 residents, 100 with blue eyes, 100 with brown eyes, and the island leader (who has green eyes). To leave the island, one must know their own eye color. There ... How many people leave the island and in how many days after the announcement? Notes: this is -Riddles
Last Answer : All 100 blue eyed people in 100 days. EXPLANATION: imagine there is only 1 person on the island, he will look around and see that there are no blue eyed people, he will then know his eye color in ... is needed to know their own eye color. if you would like more info, search '100 blue eyes riddle
Description : The line of intersection of two surfaces of a sloping roof forming an internal angle less than 180°, is known as (A) Ridge (B) Hip (C) Valley (D) None of these
Last Answer : Answer: Option C
Description : At same temperatures, the radiation emitted by all real surfaces is ______ the radiation emitted by a black body. A. Less than B. Greater than C. Equal to D. Either less than or greater than
Last Answer : Less than
Description : Urbanization usually results in an increase in flood frequency because ___________. a) Less water is able to runoff in streams b) Less water is able to infiltrate into the ground, so instead is ... humans and then discharged to streams d) Rainfall is greater in urban areas than in rural areas
Last Answer : b) Less water is able to infiltrate into the ground, so instead is discharged rapidly into streams
Description : Why do cats choose to curl up on what I would consider uncomfortable surfaces, instead of a more comfortable surface?
Last Answer : haha, I think you’re cats must be dumb…mine always sleep in soft areas that are usually warm…like an area of carpet near my glass sliding door that has sun shining on it….or a window seal. Or under my desk.
Description : Dynamic friction as compared to static friction is (A) Same (B) More (C) Less (D) May be less of more depending on nature of surfaces and velocity
Last Answer : (C) Less
Description : The two surfaces of a double concave lens are of curvature 10 cm and 40 cm. Find the focal length of the lens in water. The refractive index of water
Last Answer : The two surfaces of a double concave lens are of curvature 10 cm and 40 cm. Find the focal length of ... and that of the lens of the material is 3/2.
Description : What total water vapor released from soil and ocean surfaces as well as from plant leaves is called what?
Last Answer : Evapotranspiration
Description : Routine maintenance of dry-type transformers should include ______________. A. preventing the entrance of water from broken pipe lines steam lines B. keeping protective surfaces and insulating bushings free of ... debris C. periodic testing of insulation resistance with a megger D. all of the above
Last Answer : Answer: D
Description : Grease coatings on electrical contact surfaces increase contact resistance and should be removed with a/an _______________. A. small wire brush B. compressed air jet C. clean dry cloth D. 10% solution carbon solvent and water
Description : Ethylene oxide can be used toa. Kill Bacterial Spores. b. Clean Wounds. c. Sanitize Work Surfaces. d. Treat Water Supplies.
Last Answer : a. Kill Bacterial Spores.
Description : Evaporation from water surfaces exposed to air is not dependent of the: w) velocity of the wind x) humidity y) temperature z) depth of the water
Last Answer : ANSWER: Z -- DEPTH OF THE WATER
Description : Which one of the following dissolves more rapidly in blood haemoglobin than oxygen ?
Last Answer : Which one of the following dissolves more rapidly in blood haemoglobin than oxygen ? A. Ozone B. Nitrous oxide C. Sulphur dioxide D. Carbon monoxide
Description : What happens to a cell's ratio of surface area to volume as the volume increases more rapidly than its surface area?
Last Answer : The cell's ratio of surface area to volume would decrease if itsvolume increases more rapidly than its surface area.
Description : Why Milk sours more rapidly in summer than in winter?
Last Answer : Because it is hotter in the summer
Description : The absorption of glucose in the digestive tract (A) Occurs in the small intestine (B) Is stimulated by the hormone Glucagon (C) Occurs more rapidly than the absorption of any other sugar (D) Is impaired in cases of diabetes mellitus
Last Answer : A
Description : A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because– (1) Stone is heavier than parachute (2) Special mechanisms are present in parachute (3) A parachute has a larger surface area and air resistance is more (4) None of these
Last Answer : (3) A parachute has a larger surface area and air resistance is more Explanation: Gravity is pulling the man down while friction with the air slows him down. With the parachute out it adds more ... his parachute can make his downward speed vary between about 110 mph and 225 mph-using air resistance.
Description : With regard to dark adaptation: a. is a quicker process than light adaptation b. the sensitivity of the cones increases more rapidly than the rods c. it is monophasic in rod monochromatism d. the first limb of the curve represents rod recovery
Last Answer : it is monophasic in rod monochromatism
Description : Which of the following statements concerning SN2 reactions of alkyl halides is not correct? (a) The rate of reaction depends on the concentration of the nucleophile. (b) The rate of reaction depends on the ... carbon of the C-Br bond. (d) All alkyl iodides react more rapidly than all alkyl chlorides
Last Answer : All alkyl iodides react more rapidly than all alkyl chlorides
Description : The preferred route of administration of medication in the most acute care situations is which of the following routes? a) Intravenous The IV route is the preferred ... ) Intramuscular Intramuscular administration of medication is absorbed more slowly than intravenously administered medication.
Last Answer : a) Intravenous The IV route is the preferred parenteral route in most acute care situations because it is much more comfortable for the patient, and peak serum levels and pain relief occur more rapidly and reliably.
Description : Nonsteroidal antiinflammatory drugs are more commonly used than colchicine in acute gout because: A. They are more effective B. They act more rapidly C. They have additional uricosuric action D. They are better tolerated
Last Answer : D. They are better tolerated