The fluorescence of the glass (discharge) tube at very low pressure is characteristic of_________.

The fluorescence of the glass (discharge) tube at very low pressure is characteristic of_________.
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The fluorescence of the glass (discharge) tube at very low pressure is characteristic of_________. A. ... tube C. the cathode D. the emitted particles
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A high voltage applied to a gas discharge tube containing neon gas at very low pressure causes a current to flow through the tube. Which one of the following are the particles that flow towards the cathode? Are they w) electrons x) protons y) negatively charged neon ions z) positively charged neon ions

Description : A high voltage applied to a gas discharge tube containing neon gas at very low pressure causes a current to flow through the tube. Which one of the following are the particles that flow towards the ... Are they w) electrons x) protons y) negatively charged neon ions z) positively charged neon ions

Last Answer : ANSWER: Z -- POSITIVELY CHARGED NEON IONS

The Postmaster or_______personal duties prescribed in this rule may, under the order of_________, be delegated to the _________, Assistant Postmaster, Supervisor or office supervisor of the _______ as the case may be. a) Head Sorting Assistant , Head of the Circle, Deputy postmaster, office b) Sorting assistant , Supdt of Rms, Deputy postmaster, office c) Postal assistant , Head of the Circle, Deputy postmaster, office d) Record officer , Head of the Circle, Deputy postmaster, office

Description : The Postmaster or_______personal duties prescribed in this rule may, under the order of_________, be delegated to the _________, Assistant Postmaster, Supervisor or office supervisor of the _______ as ... Deputy postmaster, office d) Record officer , Head of the Circle, Deputy postmaster, office

Last Answer : a) Head Sorting Assistant , Head of the Circle, Deputy postmaster, office

SIDBI was set up as a subsidiary of_________. A. IDBI. B. IFCI. C. ICICI. D. SFC.

Description : SIDBI was set up as a subsidiary of_________. A. IDBI. B. IFCI. C. ICICI. D. SFC.

Last Answer : A. IDBI.

For very low pressure and high discharge rate, the compressor used is a/an __________ compressor. (A) Axial (B) Reciprocating (C) Rotary (D) None of these

Description : For very low pressure and high discharge rate, the compressor used is a/an __________ compressor. (A) Axial (B) Reciprocating (C) Rotary (D) None of these

Last Answer : (C) Rotary

The discharge tube is filled with uniform_______column glow at how enough pressure of the gas in the tube.

Description : The discharge tube is filled with uniform_______column glow at how enough pressure of the gas in the tube.

Last Answer : The discharge tube is filled with uniform_______column glow at how enough pressure of the gas in the tube.

Color of the glow produced in the discharge tube: A. depends on the pressure in the discharge tube B. depends on the metal used as cathode C. depends on the gas used in the discharge tube (Answer) D. does not depend on the nature of the gas used in the discharge tube

Description : Color of the glow produced in the discharge tube: A. depends on the pressure in the discharge tube B. depends on the metal used as cathode C. depends on the gas used in the discharge tube (Answer) D. does not depend on the nature of the gas used in the discharge tube

Last Answer : C. depends on the gas used in the discharge tube (Answer)

In laminar flow through a round tube, the discharge varies (A) Linearly as the viscosity (B) Inversely as the pressure drop (C) Inversely as the viscosity (D) As the square of the radius

Description : In laminar flow through a round tube, the discharge varies (A) Linearly as the viscosity (B) Inversely as the pressure drop (C) Inversely as the viscosity (D) As the square of the radius

Last Answer : (C) Inversely as the viscosity

Pitot tube is used for measurement of (A) Pressure (B) Flow (C) Velocity (D) Discharge

Description : Pitot tube is used for measurement of (A) Pressure (B) Flow (C) Velocity (D) Discharge

Last Answer : Answer: Option C

A pitot tube is used to measure the (A) Velocity of flow at the required point in a pipe (B) Pressure difference between two points in a pipe (C) Total pressure of liquid flowing in a pipe (D) Discharge through a pipe

Description : A pitot tube is used to measure the (A) Velocity of flow at the required point in a pipe (B) Pressure difference between two points in a pipe (C) Total pressure of liquid flowing in a pipe (D) Discharge through a pipe

Last Answer : Answer: Option A

What is fluorescence ?

Description : What is fluorescence ?

Last Answer : : Substances that absorb the 200-375 nanometer wavelength spectrum of the UV region but emit visible spectra with a wavelength of 400-780 nanometers are called fluorescence substances.

What is immuno fluorescence ?

Description : What is immuno fluorescence ?

Last Answer : Fluorescence is the property of absorbing light ray of particular wavelength and emitting rays in different wavelength. Antigens that are bound to cells or tissue sections can be visualized by tugging the antibody molecule with a fluorescent dye or fluorochrome.

Into how many types is immuno fluorescence is divided ?

Description : Into how many types is immuno fluorescence is divided ?

Last Answer : Immuno fluorescence is divided into 2 types- Direct immuno fluorescence Indirect immuno fluorescence

What is direct immuno fluorescence ?

Description : What is direct immuno fluorescence ?

Last Answer : In this method, the species antibodies are primary antibodies, which are directly conjugated to fluorescent dye.

What is the disadvantage of direct immuno fluorescence ?

Description : What is the disadvantage of direct immuno fluorescence ?

Last Answer : A separate fluorescent conjugate have to be prepared against each antigen to be tested.

What is indirect immuno fluorescence ?

Description : What is indirect immuno fluorescence ?

Last Answer : In a method the primary unlabelled antibody is detected with a number of reagents have been developed for indirect staining. The most common is fluorescence labeled anti isotype antibody such as fluoroscin labeled goat- mouse antibody.

What are the advantages of indirect immuno fluorescence ?

Description : What are the advantages of indirect immuno fluorescence ?

Last Answer : The primary does not need to be conjugated with label. It increases the sensitivity of staining because multiple fluorochrome reagents will bind to each antibody molecule. This method has great flexibility.

What are the uses of indirect immuno fluorescence ?

Description : What are the uses of indirect immuno fluorescence ?

Last Answer : For identifying bacterial species Detecting antigen-antibody complexes in autoimmune diseases Detecting compliment components in tissues. Localizing hormones

When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy state, they emit light, which we can observe in - (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence

Description : When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy state, they emit light, which we can observe in - (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence

Last Answer : (3) Emission spectra Explanation: When a metal atom is strongly heated, its electrons absorb the heat energy and jump to a higher energy level. When the electron returns to its original position it ... to the energy the electron has released at each stage °fits fall back to its original state.

Pick out the wrong statement. (A) A pale color of petroleum product indicates lower viscosity (B) Color of petroleum products indicates the degree of refinement (C) Lighter petroleum distillates are lighter in color than the heavier residual oils (D) Fluorescence of oils helps to detect its adulteration

Description : Pick out the wrong statement. (A) A pale color of petroleum product indicates lower viscosity (B) Color of petroleum products indicates the degree of refinement (C) Lighter petroleum distillates are ... in color than the heavier residual oils (D) Fluorescence of oils helps to detect its adulteration

Last Answer : (A) A pale color of petroleum product indicates lower viscosity

Particle nature of cathode rays is proved due to the fact that they (A) Travel in a straight line (B) Get deflected by magnetic electric field (C) Produce fluorescence (D) Heat the exposed material

Description : Particle nature of cathode rays is proved due to the fact that they (A) Travel in a straight line (B) Get deflected by magnetic electric field (C) Produce fluorescence (D) Heat the exposed material

Last Answer : Option B

In organic molecules, fluorescence seldom results from absorption of UV radiation of wavelengths lower than (A) 350 nm (B) 200 nm (C) 300 nm (D) 250 nm

Description : In organic molecules, fluorescence seldom results from absorption of UV radiation of wavelengths lower than (A) 350 nm (B) 200 nm (C) 300 nm (D) 250 nm

Last Answer : (A) 350 nm

Indicate the HPLC detector that is most sensitive to change in temperature : (A) PDA detector (B) Refractive Index detector (C) Electrochemical detector (D) Fluorescence detector

Description : Indicate the HPLC detector that is most sensitive to change in temperature : (A) PDA detector (B) Refractive Index detector (C) Electrochemical detector (D) Fluorescence detector

Last Answer : (B) Refractive Index detector

Which one of the following statements is WRONG? (A) A singlet or triplet state may result when one of the electrons from the HOMO is excited to higher energy levels (B) In an excited singlet state, the spin of the electron in the higher energy orbital is paired with the electron in the ground state orbital (C) Triplet excited state is more stable than the singlet excited state (D) When the electron from the singlet excited state returns to ground state, the molecule always shows fluorescence phenomenon

Description : Which one of the following statements is WRONG? (A) A singlet or triplet state may result when one of the electrons from the HOMO is excited to higher energy levels (B) In an ... the electron from the singlet excited state returns to ground state, the molecule always shows fluorescence phenomenon

Last Answer : (C) Triplet excited state is more stable than the singlet excited state

Which of the following HPLC detectors is used as a bulk property or general purpose detector? A. Electrochemical detector B. Fluorescence detector C. UV-Visible detector D. Evaporative Light scattering detector

Description : Which of the following HPLC detectors is used as a bulk property or general purpose detector? A. Electrochemical detector B. Fluorescence detector C. UV-Visible detector D. Evaporative Light scattering detector

Last Answer : D. Evaporative Light scattering detector

Hydraulic lime is not used in plastering because it may result in a) Blistering* b) Efflorescence c) Flaking d) Fluorescence

Description : Hydraulic lime is not used in plastering because it may result in a) Blistering* b) Efflorescence c) Flaking d) Fluorescence

Last Answer : a) Blistering*

The fluorescence examination of the seminal stains indicates (a). Pink color (b). White color (c). Blue color (d). Red color

Description : The fluorescence examination of the seminal stains indicates (a). Pink color (b). White color (c). Blue color (d). Red color

Last Answer : Ans: (b). Blue color 

Which of the following is an example of bulk property or general detector in HPLC A. Fluorescence detector B. Refractive index detector C. Electrochemical detector D. UV-Visible detector

Description : Which of the following is an example of bulk property or general detector in HPLC A. Fluorescence detector B. Refractive index detector C. Electrochemical detector D. UV-Visible detector

Last Answer : Refractive index detector

When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence

Description : When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence

Last Answer : Emission spectra

What is phosphorescence and fluorescence?

Description : What is phosphorescence and fluorescence?

Last Answer : Fluorescence is the light produced when the source of energy is applied. The light produced after the removal of source of energy is known as phosphorescence.

Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have (A) Very low speeds (B) Smaller discharge (C) Higher capital &maintenance cost (D) High vibrations

Description : Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have (A) Very low speeds (B) Smaller discharge (C) Higher capital &maintenance cost (D) High vibrations

Last Answer : (C) Higher capital &maintenance cost

Filtration should be stopped in a filter press, if the (A) Cake becomes very dense (B) Liquor stops flowing out to the discharge (C) Filtration pressure rises suddenly (D) Both (B) & (C

Description : Filtration should be stopped in a filter press, if the (A) Cake becomes very dense (B) Liquor stops flowing out to the discharge (C) Filtration pressure rises suddenly (D) Both (B) & (C

Last Answer : (D) Both (B) & (C

A modified discharge tube is used as ________.

Description : A modified discharge tube is used as ________.

Last Answer : A modified discharge tube is used as ________. A. cathode ray oscilloscope B. fluorescent tube C. X-ray tube D. All the above

The conditions for the discharge of electricity through gases in a discharge tube is _______.

Description : The conditions for the discharge of electricity through gases in a discharge tube is _______.

Last Answer : The conditions for the discharge of electricity through gases in a discharge tube is _______. A. ... high pressure D. low potential and low pressure

The accelerated positive ions in a discharge tube colide with_________to eject electrons.

Description : The accelerated positive ions in a discharge tube colide with_________to eject electrons.

Last Answer : The accelerated positive ions in a discharge tube colide with_________to eject electrons.

Cathode rays in a discharge tube are made up of electrons emitted from the plate that is connected to the negative terminal of the DC voltage source.

Description : Cathode rays in a discharge tube are made up of electrons emitted from the plate that is connected to the negative terminal of the DC voltage source.

Last Answer : Cathode rays in a discharge tube are made up of electrons emitted from the plate that is connected to the negative terminal of the DC voltage source.

Helium is subjected to electrical discharge. The following species is not present in the discharge tube

Description : Helium is subjected to electrical discharge. The following species is not present in the discharge tube

Last Answer : Helium is subjected to electrical discharge. The following species is not present in the discharge tube A. `He^(+)` B. `He_(2)^(+)` C. `He_(2)` D. He

An electric current of `2.0 mu A` exists in a discharge tube. How much charge flows across a cross-section of the tube in 5 minutes ?

Description : An electric current of `2.0 mu A` exists in a discharge tube. How much charge flows across a cross-section of the tube in 5 minutes ?

Last Answer : An electric current of `2.0 mu A` exists in a discharge tube. How much charge flows across a cross-section of the tube in 5 minutes ?

From which the cathode ray particles originate in a discharge tube?

Description : From which the cathode ray particles originate in a discharge tube?

Last Answer : Cathode

A __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end. (A) Compartment (B) Tube (C) Rod (D) Pebble

Description : A __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end. (A) Compartment (B) Tube (C) Rod (D) Pebble

Last Answer : (A) Compartmen

Neon gas is (A) Flammable in nature (B) Used in color discharge tube (C) Filled in lamps having tungsten filament (D) All (A), (B) and (C)

Description : Neon gas is (A) Flammable in nature (B) Used in color discharge tube (C) Filled in lamps having tungsten filament (D) All (A), (B) and (C)

Last Answer : (B) Used in color discharge tube

The discharge Q = 2 /2.3 log10 (R/rw) for the confined tube well is obtained from (A) Thiem's formula (B) Darcy's formula (C) Tolman's formula (D) Dupuits formula

Description : The discharge Q = 2 /2.3 log10 (R/rw) for the confined tube well is obtained from  (A) Thiem's formula  (B) Darcy's formula  (C) Tolman's formula  (D) Dupuits formula 

Last Answer : (D) Dupuits formula 

From which the cathode ray particles originate in a discharge tube

Description : From which the cathode ray particles originate in a discharge tube

Last Answer : Cathode

In Helium-neon Laser discharge tube, neon gas is a) 85% b) 15% c) 75% d) 45%

Description : In Helium-neon Laser discharge tube, neon gas is a) 85% b) 15% c) 75% d) 45%

Last Answer : b) 15%

In Helium-neon Laser discharge tube, helium gas is a) 15% b) 85% c) 75% d) 35%

Description : In Helium-neon Laser discharge tube, helium gas is a) 15% b) 85% c) 75% d) 35%

Last Answer : b) 85%

Variation in the drop size of seed can be minimised by (a) Using a short, smooth, small diameter tube with the discharge end close to bottom of furrow. (b) Discharging the seed directly from the metering device within a few centimetres of the furrow bottom. (c) Mechanically transferring the seeds from the metering unit in the furrow. (d) All of the above.

Description : Variation in the drop size of seed can be minimised by (a) Using a short, smooth, small diameter tube with the discharge end close to bottom of furrow. (b) Discharging the seed directly from ... (c) Mechanically transferring the seeds from the metering unit in the furrow. (d) All of the above.

Last Answer : d) All of the above.

Certain characteristic demographic features of developing countries are (a) high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution(b) high fertility, high density, rapidly rising mortality rate and a very young age distribution (c) high infant mortality, low fertility, uneven population growth and a very young age distribution (d) high mortality, high density, uneven population growth and a very old age distribution.

Description : Certain characteristic demographic features of developing countries are (a) high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution (b) high ... (d) high mortality, high density, uneven population growth and a very old age distribution.

Last Answer : (a) high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution

Finned tube heat exchangers (A) Give larger area per tube (B) Use metal fins of low thermal conductivity (C) Facilitate very large temperature drop through tube wall (D) Are used for smaller heat load

Description : Finned tube heat exchangers (A) Give larger area per tube (B) Use metal fins of low thermal conductivity (C) Facilitate very large temperature drop through tube wall (D) Are used for smaller heat load

Last Answer : (A) Give larger area per tube

Which of the following is used for very accurate measurement of flow of gas at low velocity? (A) Pitot tube (B) Rotameter (C) Segmental orificemeter (D) Hot wire anemometer

Description : Which of the following is used for very accurate measurement of flow of gas at low velocity? (A) Pitot tube (B) Rotameter (C) Segmental orificemeter (D) Hot wire anemometer

Last Answer : (D) Hot wire anemometer

The bubble tube is nearly filled with (A) Alcohol or chloroform (B) A liquid which is very mobile (C) A liquid having low freezing point (D) All the above

Description : The bubble tube is nearly filled with (A) Alcohol or chloroform (B) A liquid which is very mobile (C) A liquid having low freezing point (D) All the above

Last Answer : (D) All the above

Which of the following is an undesirable characteristic of a refrigerant? (A) It should be non-explosive (B) It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils (C) Its vapor pressure at the condenser temperature should be very high (D) None of these

Description : Which of the following is an undesirable characteristic of a refrigerant? (A) It should be non-explosive (B) It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils (C) Its vapor pressure at the condenser temperature should be very high (D) None of these

Last Answer : (B) It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils