A level when set up 25 m from peg A and 50 m from peg B reads 2.847 on a staff held on A and 3.462 on a staff held on B, keeping bubble at its centre while reading. If the reduced levels of A and B are 283.665 m and 284.295 m respectively, the collimation error per 100 m is (A) 0.015 m (B) 0.030 m (C) 0.045 m (D) 0.060 m

A level when set up 25 m from peg A and 50 m from peg B reads 2.847 on a staff held on A and
3.462 on a staff held on B, keeping bubble at its centre while reading. If the reduced levels
of A and B are 283.665 m and 284.295 m respectively, the collimation error per 100 m is
(A) 0.015 m
(B) 0.030 m
(C) 0.045 m
(D) 0.060 m
by

1 Answer

Answer :

(D) 0.060 m
by

Related questions

A dumpy level is set up with its eye-piece vertically over a peg . The height from the top of peg to the centre of the eye-piece is 1.540 m and the reading on peg is 0.705 m. The level is then setup over . The height of the eye-piece above peg is 1.490 m and a reading on is 2.195 m. The difference in level between and is (A) 2.900 m (B) 3.030 m (C) 0.770 m (D) 0.785 m

Description : A dumpy level is set up with its eye-piece vertically over a peg . The height from the top of peg to the centre of the eye-piece is 1.540 m and the reading on peg is 0.705 m. The level is then setup over . The height ... in level between and is (A) 2.900 m (B) 3.030 m (C) 0.770 m (D) 0.785 m

Last Answer : (C) 0.770 m

A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at and were 1.22 and 1.06. With the level set up at , the readings at and were 1.55 and 1.37. The collimation error per 100 m length of sight is (A) 0.02 m inclined upwards (B) 0.04 m inclined downwards (C) 0.04 m inclined upward (D) None of these

Description : A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff  readings at and were 1.22 and 1.06. With the level set up at , the readings at  and were 1.55 and ... upwards  (B) 0.04 m inclined downwards  (C) 0.04 m inclined upward  (D) None of these

Last Answer : (B) 0.04 m inclined downwards 

The back staff reading on a B.M. of R.L. 500.000 m is 2.685 m. If foresight reading on a point is 1.345 m, the reduced level of the point, is (A) 502.685 m (B) 501.345 m (C) 501.340 m (D) 504.030 m

Description : The back staff reading on a B.M. of R.L. 500.000 m is 2.685 m. If foresight reading on a point is 1.345 m, the reduced level of the point, is (A) 502.685 m (B) 501.345 m (C) 501.340 m (D) 504.030 m

Last Answer : (C) 501.340 m

The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is (A) 28.8 sec (B) 41.25 sec (C) 14.52 sec (D) 25.05

Description : The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is (A) 28.8 sec (B) 41.25 sec (C) 14.52 sec (D) 25.05

Last Answer : (B) 41.25 sec

In reciprocal levelling, the error which is not completely eliminated, is due to (A) Earth's curvature (B) Non-adjustment of line of collimation (C) Refraction (D) Non-adjustment of the bubble tube

Description : In reciprocal levelling, the error which is not completely eliminated, is due to  (A) Earth's curvature  (B) Non-adjustment of line of collimation  (C) Refraction  (D) Non-adjustment of the bubble tube 

Last Answer : (C) Refraction 

While rotating the theodolite in the horizontal plane, the bubble of the bubble tube takes up the same position in its tube, it indicates (A) The rotation axis is vertical (B) The trunnion axis is horizontal (C) The line of collimation is perpendicular to vertical axis (D) None of the above

Description : While rotating the theodolite in the horizontal plane, the bubble of the bubble tube takes up the  same position in its tube, it indicates  (A) The rotation axis is vertical  (B) The trunnion ... (C) The line of collimation is perpendicular to vertical axis  (D) None of the above

Last Answer : (A) The rotation axis is vertical

Ajay reads at an average rate of 30 pages per hour, while Vikram reads at an average rate of 40 pages per hour. If Ajay starts reading a novel at 4:30 PM and Vikram begins reading an identical copy of the same book at 5:20 PM, at what time will they be reading the same page? a) 7:50 PM b) 8:15 PM c) 8:40 PM d) 9:00 PM e) 9:25 PM

Description : Ajay reads at an average rate of 30 pages per hour, while Vikram reads at an average rate of 40 pages per hour. If Ajay starts reading a novel at 4:30 PM and Vikram begins reading an identical copy of the same book at 5:20 PM, at ... same page? a) 7:50 PM b) 8:15 PM c) 8:40 PM d) 9:00 PM e) 9:25 PM

Last Answer : Ajay reads at average rate of 30 pages per hour ie. 1 page in every two minutes. Therefore, by 5:20 PM, he would have covered 25 pages By 6:20 PM, Ajay would have read 25+30 pages and Vikram would have ... and he will also finish 100 pages Hence, both of them will be on same page at 7:50 Answer: a)

The line of collimation method of reduction of levels, does not provide a check on (A) Intermediate sights (B) Fore sights (C) Back sights (D) Reduced levels

Description : The line of collimation method of reduction of levels, does not provide a check on (A) Intermediate sights (B) Fore sights (C) Back sights (D) Reduced levels

Last Answer : (A) Intermediate sights

Which one of the following statements is not correc t? (a) Parallax error is eliminated when there is no change in the staff reading when eye is moved up and down (b) The objective lens is to be focused towards a white or bright background for clear visibility of cross-hairs (c) Temporary adjustments of the dumpy level are to be performed at every set up (d) The eyepiece need not be adjusted after the first set up when the same surveyor is taking readings

Description : Which one of the following statements is not correc t? (a) Parallax error is eliminated when there is no change in the staff reading when eye is moved up and down (b) The objective lens is ... (d) The eyepiece need not be adjusted after the first set up when the same surveyor is taking readings

Last Answer : (b) The objective lens is to be focused towards a white or bright background for clear visibility of cross-hairs

In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to (A) Line of sight (B) Line of collimation (C) Axis of the telescope (D) None of these

Description : In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to (A) Line of sight (B) Line of collimation (C) Axis of the telescope (D) None of these

Last Answer : (A) Line of sight

When the bubble of the level tube of a level, remains central (A) Line of sight is horizontal (B) Axis of the telescope is horizontal (C) Line of collimation is horizontal (D) Geometrical axis of the telescope is horizontal

Description : When the bubble of the level tube of a level, remains central (A) Line of sight is horizontal (B) Axis of the telescope is horizontal (C) Line of collimation is horizontal (D) Geometrical axis of the telescope is horizontal

Last Answer : (A) Line of sight is horizontal

The reduced level of a floor is 99.995 m, the staff reading on the floor is 1.505 m. If the inverted staff reading against the roof is 1.795 m, the floor level below the slab, is (A) 3.290 m (B) 3.300 m (C) 3.275 m (D) 2.790 m

Description : The reduced level of a floor is 99.995 m, the staff reading on the floor is 1.505 m. If the inverted staff reading against the roof is 1.795 m, the floor level below the slab, is (A) 3.290 m (B) 3.300 m (C) 3.275 m (D) 2.790 m

Last Answer : (B) 3.300 m

A dumpy level was set up at mid-point between pegs A and B, 80 m apart and the staff readings were 1.32 and 1.56. When the level was set up at a point 10 m from A on BA produced, the staff readings obtained at A and B were 1.11 and 1.39. The correct staff reading from this set up at S should be (A) 1.435 (B) 1.345 (C) 1.425 (D) None of these

Description : A dumpy level was set up at mid-point between pegs A and B, 80 m apart and the staff readings were 1.32 and 1.56. When the level was set up at a point 10 m from A on BA produced, the staff readings obtained at A ... this set up at S should be (A) 1.435 (B) 1.345 (C) 1.425 (D) None of these

Last Answer : (B) 1.345

For 12 mm thick cement plastering 1 : 6 on 100 sq.m new brick work, the quantity of cement required, is (A) 0.200 m3 (B) 0.247 m3 (C) 0.274 m3 (D) 0.295 m

Description : For 12 mm thick cement plastering 1 : 6 on 100 sq.m new brick work, the quantity of cement required, is (A) 0.200 m3 (B) 0.247 m3 (C) 0.274 m3 (D) 0.295 m

Last Answer : (C) 0.274 m3

The radius of curvature of the arc of the bubble tube is generally kept (A) 10 m (B) 25 m (C) 50 m (D) 100 m

Description : The radius of curvature of the arc of the bubble tube is generally kept (A) 10 m (B) 25 m (C) 50 m (D) 100 m

Last Answer : (D) 100 m

Keeping the instrument height as 1½ m, length of staff 4 m, the up gradient of the ground 1 in 10, the sight on the up slope must be less than (A) 25 cm (B) 20 m (C) 45 m (D) 10 m

Description : Keeping the instrument height as 1½ m, length of staff 4 m, the up gradient of the ground 1 in 10,  the sight on the up slope must be less than  (A) 25 cm  (B) 20 m  (C) 45 m  (D) 10 m

Last Answer : (C) 45 m 

R.L. of floor at a building is 74.4 m, staff reading on the floor is 1.625 and staff reading when it is held inverted with bottom touching the ceiling of a hall is 2.870; then the height of the ceiling above the floor is (a) 3.593 m (b) 3.953 m (c) 4.495 m (d) 4. 594 m

Description : R.L. of floor at a building is 74.4 m, staff reading on the floor is 1.625 and staff reading when it is held inverted with bottom touching the ceiling of a hall is 2.870; then the height of the ceiling above the floor is (a) 3.593 m (b) 3.953 m (c) 4.495 m (d) 4. 594 m

Last Answer : (c) 4.495 m

Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than (A) 30 m (B) 25 m (C) 20 m (D) 15 m

Description : Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the  sight on the down-slope, must be less than  (A) 30 m  (B) 25 m  (C) 20 m  (D) 15 m 

Last Answer : (B) 25 m 

If the static deflection is 1.665×10 -3 m, calculate the critical speed of the shaft in rps. Centre of disc at 0.25m away from centre of axis of shaft. A. 8.64 B. 9.64 C. 10.64 D. 12.2

Description : If the static deflection is 1.665×10 -3 m, calculate the critical speed of the shaft in rps. Centre of disc at 0.25m away from centre of axis of shaft. A. 8.64 B. 9.64 C. 10.64 D. 12.2

Last Answer : D. 12.2

A structure is erected on an impervious clay whose thickness is 12 m. Drainage is possible both at upper and lower surfaces. Coefficient of consolidation is 0.015 cm2 per minute. For attaining 50% consolidation with a time factor 0.20, the number of days required (A) 3233 (B) 3123 (C) 33331 (D) 3313

Description : A structure is erected on an impervious clay whose thickness is 12 m. Drainage is possible both at upper and lower surfaces. Coefficient of consolidation is 0.015 cm2 per minute. For attaining 50% consolidation with a ... 20, the number of days required (A) 3233 (B) 3123 (C) 33331 (D) 3313

Last Answer : Answer: Option C

If the reduced bearing of a line AB is N60°W and length is 100 m, then the latitude and departure respectively of the line AB will be (A) +50 m, +86.6 m (B) +86.6 m, -50 m (C) +50 m, -86.6 m (D) +70.7 m, -50 m

Description : If the reduced bearing of a line AB is N60°W and length is 100 m, then the latitude and departure respectively of the line AB will be (A) +50 m, +86.6 m (B) +86.6 m, -50 m (C) +50 m, -86.6 m (D) +70.7 m, -50 m

Last Answer : (B) +86.6 m, -50 m

Staff readings on pegs x and y from X station are 1.755 m and 2.850 m, and from station Y on staff head at Y and X are 0.655 m and 1.560 m. If reduced level of X is 105.5 m, the reduced level of Y is (A) 104.0 m (B) 104.5 m (C) 105.0 m (D) 105.5 m

Description : Staff readings on pegs x and y from X station are 1.755 m and 2.850 m, and from station Y on staff head at Y and X are 0.655 m and 1.560 m. If reduced level of X is 105.5 m, the reduced level of Y is (A) 104.0 m (B) 104.5 m (C) 105.0 m (D) 105.5 m

Last Answer : (B) 104.5 m

Pick up the incorrect statement from the following: (A) While measuring a distance with a tape of length 100.005 m, the distance to be increasing by 0.005 m for each tape length (B) An increase in temperature causes a tape to increase in length and the measured distance is too large (C) The straight distance between end points of a suspended tape is reduced by an amount called the sag correction (D) A 100 m tape of cross section 10 mm × 0.25 mm stretches about 10 mm under 5 kg pull

Description : Pick up the incorrect statement from the following: (A) While measuring a distance with a tape of length 100.005 m, the distance to be increasing by 0.005 m for each tape length (B) An increase in ... ) A 100 m tape of cross section 10 mm 0.25 mm stretches about 10 mm under 5 kg pull

Last Answer : (B) An increase in temperature causes a tape to increase in length and the measured distance is too large

The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is A. 1 in 100 upward B. 1 in 500 upward C. 1 in 100 downward D. 1 in 503 upward

Description : The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is A. 1 in 100 upward B. 1 in 500 upward C. 1 in 100 downward D. 1 in 503 upward

Last Answer : ANS: C

In the illustrated motor controller, the motor fails to start. A voltmeter reading between 1 and 6 reads line voltage, while the voltmeter reading between 2 and 6 reads 0 VAC. The problem is __________. EL-0007 A. the control fuse is the wrong amperage not allowing full current to pass through B. the stop switch is open C. an open in the 'M' coil, 'Ma' contact/start switch or overload contacts D. fuse '10a' is blown

Description : In the illustrated motor controller, the motor fails to start. A voltmeter reading between 1 and 6 reads line voltage, while the voltmeter reading between 2 and 6 reads 0 VAC. The problem is __________. EL- ... in the 'M' coil, 'Ma' contact/start switch or overload contacts D. fuse '10a' is blown

Last Answer : Answer: B

You are measuring noise in a voice channel at 7 dB test point level. The meter reads -56 dBm (FIA weighted). What is the reading in dBrnc? A. 20 B. 32 C. 35 D. 25

Description : You are measuring noise in a voice channel at 7 dB test point level. The meter reads -56 dBm (FIA weighted). What is the reading in dBrnc? A. 20 B. 32 C. 35 D. 25

Last Answer : C. 35

If the intercept on a vertical staff is observed as 0.75 m from a tachometer, the horizontal distance between tachometer and staff (A) 7.5 m (B) 25 m (C) 50 m (D) 75 m

Description : If the intercept on a vertical staff is observed as 0.75 m from a tachometer, the horizontal distance between tachometer and staff (A) 7.5 m (B) 25 m (C) 50 m (D) 75 m

Last Answer : (D) 75 m

The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as (A) Line of sight (B) Line of collimation (C) Axis of the telescope (D) None of these

Description : The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as (A) Line of sight (B) Line of collimation (C) Axis of the telescope (D) None of these

Last Answer : (B) Line of collimation

If 50 m point of a 100 m tape is 50 cm off line, and 50 m sections are straight, an error is generated equal to (A) 1/10,000 (B) 1/15,000 (C) 1/20,000 (D) 1/25,000

Description : If 50 m point of a 100 m tape is 50 cm off line, and 50 m sections are straight, an error is generated equal to (A) 1/10,000 (B) 1/15,000 (C) 1/20,000 (D) 1/25,000

Last Answer : (C) 1/20,000

Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability (A) Increases by 25 % (B) Increases by 50 % (C) Increases by 33.3 % (D) Decreases by 33.3 %

Description : Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability (A) Increases by 25 % (B) Increases by 50 % (C) Increases by 33.3 % (D) Decreases by 33.3 %

Last Answer : (B) Increases by 50 %

In precision theodolite traverse if included angles are read twice and the mean reading accepted using both verniers having a least count of 30". Assuming the instrument to be in perfect adjustment, linear measurements correct to 6 mm per 30 metre tape duly corrected for temperature, slope and sag, the angular error of closure not to exceed (where n is the number of traverse legs) (A) 50" n(B) 30" n(C) 60" n (D) None of these

Description : In precision theodolite traverse if included angles are read twice and the mean reading accepted using both verniers having a least count of 30". Assuming the instrument to be in perfect adjustment, linear measurements correct to 6 mm per ... legs) (A) 50" n (B) 30" n (C) 60" n (D) None of these

Last Answer : (A) 50" n

In horizontal angles, the error due to imperfect levelling of the plate bubble is (A) Large when sights are nearly level (B) Large for long sights (C) Less for steeply inclined sights (D) Large for steeply inclined sights

Description : In horizontal angles, the error due to imperfect levelling of the plate bubble is (A) Large when sights are nearly level (B) Large for long sights (C) Less for steeply inclined sights (D) Large for steeply inclined sights

Last Answer : (D) Large for steeply inclined sights

For lapped joints, which of the following is the minimum finished height of face? a) Not less than the nominal pipe wall. b) Not less than .25". c) At least .060". d) 3/8".

Description : For lapped joints, which of the following is the minimum finished height of face? a) Not less than the nominal pipe wall. b) Not less than .25". c) At least .060". d) 3/8".

Last Answer : a) Not less than the nominal pipe wall.

The tensile force required to cause an elongation of 0.045 mm in a steel rod of 1000 mm length and 12 mm diameter, is (where E = 2 × 106 kg/cm2 ) (A) 166 kg (B) 102 kg (C) 204 kg (D) 74 kg

Description : The tensile force required to cause an elongation of 0.045 mm in a steel rod of 1000 mm length and 12 mm diameter, is (where E = 2 × 106 kg/cm2 ) (A) 166 kg (B) 102 kg (C) 204 kg (D) 74 kg

Last Answer : (B) 102 kg

Which of the following statements is incorrect? (A) Error due to refraction may not be completely eliminated by reciprocal levelling (B) Tilting levels are commonly used for precision work (C) The last reading of levelling is always a foresight (D) All of the above statements are incorrect

Description : Which of the following statements is incorrect? (A) Error due to refraction may not be completely eliminated by reciprocal levelling (B) Tilting levels are commonly used for precision work (C) The last reading of levelling is always a foresight (D) All of the above statements are incorrect

Last Answer : (D) All of the above statements are incorrect

Exposure of the patient to ionising radiation when taking a radiograph is NOT REDUCED by: A. The use of fast film B. The addition of filtration C. Collimation of the beam D. The use of an open and lead lined cone E. Decreasing the kilovoltage KvP

Description : Exposure of the patient to ionising radiation when taking a radiograph is NOT REDUCED by: A. The use of fast film B. The addition of filtration C. Collimation of the beam D. The use of an open and lead lined cone E. Decreasing the kilovoltage KvP

Last Answer : E. Decreasing the kilovoltage KvP

A stilling well is required when the stage measurement is made by employing : a) Bubble gauge b) Float gauge recorder c) Vertical staff gauge d) Inclined staff gauge

Description : A stilling well is required when the stage measurement is made by employing : a) Bubble gauge b) Float gauge recorder c) Vertical staff gauge d) Inclined staff gauge

Last Answer : b) Float gauge recorder

What is the purpose of either 'setpoint module' (6000F090/030) shown in the illustration? EL-0094 A. Program the 'signal conditioner' as to how to vary its input. B. Supply 0 - 10 volts to the 'signal conditioner'. C. Initiate logging of measured information at set intervals; for example, each hour. D. Obtain an input from the 'signal conditioner' and, if outside set limits, signals the 'annunciator'.

Description : What is the purpose of either 'setpoint module' (6000F090/030) shown in the illustration? EL-0094 A. Program the 'signal conditioner' as to how to vary its input. B. Supply 0 - 10 volts to ... . Obtain an input from the 'signal conditioner' and, if outside set limits, signals the 'annunciator'.

Last Answer : Answer: D

Pick up the correct statement from the following: (A) An observation or the resulting reading with the level on a levelling staff is called sight (B) A back sight is the first sight taken after setting up the instrument in any position (C) The first sight on each change point is a fore sight (D) All the above

Description : Pick up the correct statement from the following: (A) An observation or the resulting reading with the level on a levelling staff is called sight (B) A back sight is the first sight taken after setting up ... position (C) The first sight on each change point is a fore sight (D) All the above

Last Answer : (D) All the above

Compare collimation plane method and rise and fall method of reduction of levels.

Description : Compare collimation plane method and rise and fall method of reduction of levels.

Last Answer : The comparison between collimation plane method and Rise and fall method is given below. Collimation plane method Rise and Fall method 1 1. It is rapid method as it involves few calculations. ... Arithmetic check in this method is ΣBS - ΣFS = ΣRise - ΣFall = Last RL - First RL

A theodolite is said to be in perfect adjustment if (A) Rotation axis is vertical to the transit axis (B) Transit axis is perpendicular to line of collimation (C) Line of collimation sweeps out a vertical plane while the telescope is elevated or depressed (D) All the above

Description : A theodolite is said to be in perfect adjustment if (A) Rotation axis is vertical to the transit axis (B) Transit axis is perpendicular to line of collimation (C) Line of collimation sweeps out a vertical plane while the telescope is elevated or depressed (D) All the above

Last Answer : (D) All the above

Mention any four points to be kept in mind while entering the staff reading in a level field book.

Description : Mention any four points to be kept in mind while entering the staff reading in a level field book.

Last Answer : The following points kept in mind while entering the staff reading in a level field book. 1) The reading should be entered in the respective columns and in order of their observation. 2) The ... accurately described in the Remarks column, and their sketches drawn on the left hand side of the page.

State the important points kept in mind while recording the staff readings in level pages with respect first reading, intermediate reading, last reading, change point, carry forward from one page to next page-Remark

Description : State the important points kept in mind while recording the staff readings in level pages with respect first reading, intermediate reading, last reading, change point, carry forward from one page to next page-Remark

Last Answer : 1) First reading is on bench mark point and should be noted in back sight(BS) column 2) Intermediate reading (IS) should be taken on the points between first and last station. 3) Last reading ... column of next page 6) Remark column should have denote First and Last RL along with change points.

Who likes ppi and GHZ ? Regulotion 720X1440 Pixels ratio 18.9 295 PPI (2.0X2.0 GHz Cortex-A53 & 6X1.45 GHZ) while regulotion 720X1520 Pixels ratio 19.9 ~ 271ppi (2x1.45 GHz Cortex-A53 & 6X1.45 GHZ )

Description : Who likes ppi and GHZ ? Regulotion 720X1440 Pixels ratio 18.9 295 PPI (2.0X2.0 GHz Cortex-A53 & 6X1.45 GHZ) while regulotion 720X1520 Pixels ratio 19.9 ~ 271ppi (2x1.45 GHz Cortex-A53 & 6X1.45 GHZ )

Last Answer : answer:

Which of the following in theodolite work is imperfect adjustment of the instrument (a) Error due to line of collimation being perpendicular to the horizontal axis (b) Error due to axis not to perpendicular of the vertical axis (c) Error due to imperfect graduation (d) Error due to eccentricity of vernires (e) All of the above*

Description : Which of the following in theodolite work is imperfect adjustment of the instrument (a) Error due to line of collimation being perpendicular to the horizontal axis (b) Error due to axis not to perpendicular ... to imperfect graduation (d) Error due to eccentricity of vernires (e) All of the above*

Last Answer : (e) All of the above*

The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to (A) The distance between the zero of gradient and the foot of the staff (B) Twice the distance between the zero of graduation and the foot of the staff (C) Thrice the distance between the zero of graduation and the foot of the staff (D) None of the above

Description : The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to (A) The distance between the zero of ... Thrice the distance between the zero of graduation and the foot of the staff (D) None of the above

Last Answer : (B) Twice the distance between the zero of graduation and the foot of the staff

A long iron rod initially at a temperature of 20°C has one end dipped in boiling water (100°C) at time, t = 0. The curved surface of the rod is insulated so that heat conduction is one dimensional in the axial direction. The temperature at a distance 100 mm from the dipped end becomes 40°C at time, t = 200 s. The same temperature is achieved at a distance of 200 mm from the dipped end at time (A) t = 283 s (B) t = 356 s (C) t = 400 s (D) t = 800 s

Description : A long iron rod initially at a temperature of 20°C has one end dipped in boiling water (100°C) at time, t = 0. The curved surface of the rod is insulated so that heat conduction is one dimensional in the axial direction. The ... = 283 s (B) t = 356 s (C) t = 400 s (D) t = 800 s

Last Answer : (D) t = 800 s

In a 200-ml sample of 0.030 M Na3P04 what is the concentration of Na plus?

Description : In a 200-ml sample of 0.030 M Na3P04 what is the concentration of Na plus?

Last Answer : 200 mL sample of 0,030 M Na3P04 contain 0,414 g sodium; the concentration of Na is 2,07 g/L.