Description : When MMA welding what will be the effect on the weld f the power source was changed from AC to DC-ve? a) None b) Higher deposition rate c) It would slightly increase the depth of penetration d) The arc would become unstable
Last Answer : b) Higher deposition rate
Description : When a light wave suffers reflection at the interface between air and glass medium, the change of phase of the reflected wave in air is equal to (a) 0 (b) π (c) 2π (d) π/2
Last Answer : (b) π
Description : When a light wave suffers reflection at the interface between air and glass medium, the change of phase of the reflected wave in air is equal to A. 0 B. π C.2 π D.π /2
Last Answer : B. π
Description : A medium containing crystal violet dye plus sodium deoxycholate will allow A- gram (-)ve intestinal bacteria to grow B- gram (+)ve intestinal bacteria to grow C- .aquatic bacteria to grow D- none of these
Last Answer : gram (-)ve intestinal bacteria to grow
Description : Some statement about Ellingham diagram (a) Increase in the slope of the line on +ve side indicates the phase ransformation (b) Metal oxide decomposes
Last Answer : Some statement about Ellingham diagram (a) Increase in the slope of the line on +ve side indicates the phase ... C. Only b and c D. a,b and c
Description : Quality of a musical note depends on – (1) Fundamental frequency (2) Amplitude of the wave (3) Harmonics present (4) Velocity of sound in the medium
Last Answer : (3) Harmonics present Explanation: Sound "quality" or "timbre" describes those characteristics of sound which allow the ear to distinguish sounds which have the same pitch and loudness. Timbre is mainly ... and the attack-decay envelope of the sound. Harmonic content is the most important of these.
Description : A wave in which the wave’s medium is compressed in the same direction as the movement of the wave A. Transversal wave B. Transverse wave C. Frequency wave D. compression wave
Last Answer : C. Frequency wave
Description : The speed of any mechanical wave as it propagates through a medium is dependent mainly on the A. frequency of the wave source B. wavelength C. period of the wave D. type of medium through which the wave travels E. amplitude
Last Answer : D. type of medium through which the wave travels
Description : Quality of a musical note depends on (1) Fundamental frequency (2) Amplitude of the wave (3) Harmonics present (4) Velocity of sound in the medium
Last Answer : Harmonics present
Description : The speed of a multi-speed, squirrel-cage, induction motor operating in a fixed frequency system can be changed by _____________. A. reconnecting stator windings for different numbers of poles B. ... sequence of the applied voltage D. reconnecting the stator so that no poles have the same polarity
Last Answer : Answer: A
Description : Pick up the correct statement from the following: (A) The refractive index of a medium varies according to the wavelength of the radiation, (B) The variation of the refractive index with wave length, ... of white light by passing through a prism is caused due to dispersion (D) All of these
Last Answer : Answer: Option D
Description : If the phase difference between two points is 120° for a wave with velocity of 360 m/ and frequency 500 Hz, then path difference between the two points is – (1) 1 cm (2) 6 cm (3) 12 cm (4) 24 cm
Last Answer : (4) 24 cm
Description : The number of cycles per second occurring in AC voltage is known as the _____________. A. phase angle B. frequency C. wave form D. half mode
Last Answer : Answer: B
Description : What type of transmission is radiated from an aircraft’s radio altimeter antenna? A. An amplitude modulated continuous wave B. A pulse position modulated UHF signal C. A differential phase shift keyed UHF signal D. A frequency modulated continuous wave
Last Answer : D. A frequency modulated continuous wave
Description : Amplitude of modulated wave is in phase with A. output B. system C. frequency D. signal
Last Answer : signal
Description : A sine wave in the ______domain can be representedby onesingle spikein the _____domain. A) time; frequency B) frequency; time C) time; phase D) phase; time
Last Answer : time; frequency
Description : The phase constant of a wave propagation with frequency of 35 radian/sec and time delay of 7.5 sec is a) 4.66 b) 262.5 c) 46.6 d) 26.25
Last Answer : b) 262.5
Description : The group delay of a wave with phase constant 2.5 units and frequency of 1.2 radian/sec is a) 3.7 b) 1.3 c) 3 d) 2.08
Last Answer : d) 2.08
Description : The frequency in rad/sec of a wave with velocity of that of light and phase constant of 20 units is (in GHz) a) 6 b) 60 c) 600 d) 0.6
Last Answer : a) 6
Description : Calculate the velocity of wave propagation in a conductor with frequency 5 x 10 8 rad/s and phase constant of 3 x 10 8 units. a) 3/5 b) 15 c) 5/3 d) 8
Last Answer : c) 5/3
Description : Calculate the velocity of a wave with frequency 2 x10 9 rad/s and phase constant of 4 x 10 8 units. a) 0.5 b) 5 c) 0.2 d) 2
Last Answer : b) 5
Description : Calculate the phase constant of a wave with frequency 12 rad/s and velocity 3×10 8 m/s(in 10 -8 order) a) 0.5 b) 72 c) 4 d) 3
Last Answer : c) 4
Description : If the phase difference between two points is 120° for a wave with velocity of 360 m/ and frequency 500 Hz, then path difference between the two points is (1) 1 cm (2) 6 cm (3) 12 cm (4) 24 cm
Last Answer : 24 cm
Description : The input frequency is 50 Hz. The ripple frequency in a 12 phase full wave rectifier is (A) 1200 Hz (B) 600 Hz (C) 100 Hz (D) 50 Hz
Last Answer : The input frequency is 50 Hz. The ripple frequency in a 12 phase full wave rectifier is 1200 Hz
Description : Heat cannot be created, nor destroyed, but it can be changed from one form to another. The energy in the universe remains constant. a. 1st Law of Energy Conservation b. 2nd Law of Energy Conservation c. 3rd Law of Energy Conservation d. None of the above
Last Answer : 1st Law of Energy Conservation
Description : Internal energy change of a system over one complete cycle in a cyclic process is (A) Zero (B) +ve (C) -ve (D) Dependent on the path
Last Answer : (A) Zero
Description : In an ideal refrigeration cycle, the change in internal energy of the fluid is (A) +ve (B) -ve (C) 0 (D) Either of the above three; depends on the nature of refrigerant
Last Answer : (C) 0
Description : When a light wave suffers reflection at the interface between air and glass medium, the change of wavelength of the reflected wave in air is equal to (a) 0 (b) λ/2 (c) λ (d) 2λ
Last Answer : (b) λ/2
Description : The main advantage of the parliamentary form of government is that (1) the executive and legislature work independently. (2) it provides continuity of policy and is more efficient. (3) the ... responsible to the legislature. (4) the head of the government cannot be changed without election.
Last Answer : (3) the executive remains responsible to the legislature. Explanation: New NCERT, Std. 11, Introduction to Indian Constitution, page 91: Parliamentary system is also known as Cabinet Government. It provides for collective responsibility of the executive to the legislature. Hence answer "C".
Description : The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will (A) Increase (B) Decrease (C) Remain same (D) Depend on saturated boiling point; may increase or decrease
Last Answer : (A) Increase
Description : Which statement best describes the operating principle of a constant-speed propeller? a. As throttle setting is changed by the pilot, the prop governor causes pitch angle of the propeller blades to ... the pilot, the RPM of the engines remains constant as the pitch angle of the propeller changes
Last Answer : b. The propeller control regulates the engine RPM and in turn the propeller RPM
Description : I am a vietnam vet I,ve never applied for medicial or disability benifits but now have too. where do I start I am recieving ssd and have had a liver transplant?
Last Answer : Contact your local VA office there are plenty of government support programs for Disabled vets.
Description : In a typical medium speed 4- stroke Diesel engine, the inlet valve A. opens 20°before top dead centre and closes at 35°afterthebottomdead centre. B. opens up at top dead centre and closes at bottomdead centre C. may open orcloseanywhere D. remains open for 200°
Last Answer : ANSWER : A
Description : The speed of light with the rise in the temperature of the medium : (1) Increases (2) Decreases (3) Remains unaltered (4) Drops suddenly
Last Answer : (3) Remains unaltered Explanation: The speed of light with the rise in the temperature of the medium remains unaltered because speed of light doesn't depend on temperature. It does depend, however ... in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics.
Description : Oxethazaine is used for anaesthetizing gastric mucosa because: A. It is not absorbed from the gastrointestinal tract B. It remains largely unionized in acidic medium C. It is highly ionized in acidic medium D. It produces no systemic effects even at high doses
Last Answer : B. It remains largely unionized in acidic medium
Last Answer : Remains unaltered
Description : When a beam of light enters one medium from another, which quantity will not change? a. Direction b. Speed c. Frequency d. Wavelength
Last Answer : c. Frequency
Description : Quantity that do not change when a beam of light enters on e medium to another. A. Frequency B. Wavelength C. Direction D. Speed
Last Answer : A. Frequency
Description : When a beam of light enters one medium from another, which quantity will not change? ∙ a. Direction ∙ b. Speed ∙ c. Frequency ∙ d. Wavelength
Description : When a light wave is reflected from a mirror, there is a change in its – (1) frequency (2) amplitude (3) wavelength (4) velocity
Last Answer : (2) amplitude Explanation: When a light wave is reflected from an object, it changes not only its amplitude but also its phase according to the properties of the object at a particular point. The velocity and momentum are just reversed in another direction.
Description : When a light wave is reflected from a mirror, there is a change in its (1) frequency (2) amplitude (3) wavelength (4) velocity
Last Answer : amplitude
Description : A source produces sound waves under water. Waves travel through water and then into air. Which of the following statements about the frequency (f) and the wavelength () is correct and sound passes from ... increases. (3) remains unchanged but f decreases. (4) remains unchanged but f increases.
Last Answer : 3) remains unchanged but f decreases.
Description : A 220/440 V, 50 Hz, 5 KVA, single phase transformer operates on 220V, 40Hz supply with secondary winding open circuited. Then (A) Both eddy current and hysteresis losses decreases. (B) Both ... same but hysteresis loss increases. (D) Eddy current loss increases but hysteresis loss remains the same.
Last Answer : (A) Both eddy current and hysteresis losses decreases.
Description : Oxygen exhibits its `+ve` oxidation states in its
Last Answer : Oxygen exhibits its `+ve` oxidation states in its A. Fluorides B. Chlorides C. Nitrides D. Sulphides
Description : The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is (A) ∞ (B) 1 (C) 0 (D) -ve
Description : Like New Pr Like New Products w oducts wants to i ants to improve its pack ve its packaging aft aging after readi er reading custo ng customer res mer responses t ponses to its customer its ... brand mark. It contains the brand mark. c. It protects children. d. It determines product quality.
Last Answer : d. It determines product quality.
Description : How wavelength of wave traveling with the same speed would change if the frequency of the wave increase?
Last Answer : The speed of a wave is equal to the wavelength divided by the frequency (speed = wavelength/frequency). So if the frequency of the wave increases, the wavelength will decrease.
Description : Metal present in the exhaust gases of ve- hicles?
Last Answer : Lead
Description : Ionic compounds containing cations (+ve ion) and anions (-ve ion) are?
Last Answer : Salt
Description : The element used in the smoke of the ve- hicles?