Description : The most common unit of noise measurement in white noise voltage testing. A. NPR B. dBm C. dBW D. dBrn
Last Answer : A. NPR
Description : What is the reference tone level for dBrn? A. -90 dBm B. -82 dBm C. -67 dBm D. -85 dBm
Last Answer : A. -90 dBm
Description : Reference noise is ___________. A. a 1000 Hz, -90 dBm tone B. a noise that creates the same interfering effect as a 1000Hz, -90dBm tone C. a noise that creates zero dBrn in a voice channel D. B and C above
Last Answer : D. B and C above
Description : Reading a 58 dBrn, at a +7 test point is equal to ________ dBa0. A. 26 B. 65 C. 51 D. 46
Last Answer : D. 46
Description : What is the unit of noise power of psophometer? A. pWp B. dBa C. dBm D. dBrn
Last Answer : A. pWp
Description : Which stands for dB relative level? A. dBrn B. dBm C. dBr D. dBa
Last Answer : C. dBr
Description : A number with both integer and a fractional part has digits raised to both positive and negative powers of 2 in a decimal number system. a) True b) False
Last Answer : Answer: b Explanation: In a decimal number system, a number with both integer and a fractional part has digits raised to both positive and negative powers of 10 and not 2. e.g. 22.34 = 2 * 101 + 2 * 100 + 3 * 10-1 + 4 * 10-2
Description : If two commodities are complements, then their crossprice elasticity is- (1) zero (2) positive (3) negative (4) imaginary number
Last Answer : (4) imaginary number Explanation: In economics, the cross elasticity of demand or cross-price elasticity of demand measures the responsiveness of the demand for a good to a change in ... denotes two products that are complements, while a positive cross elasticity denotes two substitute products.
Description : If two commodities are complements, then their cross-price elasticity is (1) zero (2) positive (3) negative (4) imaginary number
Last Answer : negative
Description : What is antenna bandwidth? A. Antenna length divided by the number of elements B. The angle between the half-power radiation points C. The angle formed between two imaginary lines drawn through D. The frequency range over which an antenna can be expected to operate satisfactorily
Last Answer : D. The frequency range over which an antenna can be expected to operate satisfactorily
Description : What is meant by the term antenna bandwidth A. Antenna length divided by the number of elements. B. The angle between the half-power radiation points C. The frequency range over which and antenna ... perform well D. The angle formed between two imaginary line drawn through the ends of the elements
Last Answer : C. The frequency range over which and antenna can be expected to perform well
Description : What is positive and negative clipping?
Last Answer : Depending on the orientation of the diode, the positive or negative region of the input signal is “clipped” off and accordingly the diode clippers may be positive or negative clippers.
Description : Transmission lines are either balanced or unbalanced with respect to _________. A. negative terminal B. input C. ground D. positive terminal
Last Answer : C. ground
Description : It is the made from semiconductor material such as aluminum-galium-arsenide or gallium-arsenide-phosphide. A. APD B. Injection laser diode C. Light emitting diode D. Positive-intrinsic-negative
Last Answer : C. Light emitting diode
Description : Which of the following imaginary line almost divides India into two equal parts? A. Equator B. Tropic of Cancer C. Tropic of Capricorn D. Arctic Circle
Last Answer : B. Tropic of Cancer
Description : Top loading is used in an antenna in order to increase its ______. A. practical height B. beamwidth C. effective height D. input capacitance
Last Answer : C. effective height
Description : What is the need for frequency compensation in practical op-amps?
Last Answer : Frequency compensation is needed when large bandwidth and lower closed loop gain is desired. Compensating networks are used to control the phase shift and hence to improve the stability.
Description : In practical op-amps, what is the effect of high frequency on its performance?
Last Answer : The open-loop gain of op-amp decreases at higher frequencies due to the presence of parasitic capacitance. The closed-loop gain increases at higher frequencies and leads to instability.
Description : An object farther from a converging lens than its focal point always has an _______ image. A. virtual B. the same in size C. inverted D. smaller size
Last Answer : C. inverted
Description : A satellite beam that covers almost 42.4% of the earths surface. A. Zone beam B. Hemispheric beam C. Spot beam D. Global beam
Last Answer : D. Global beam
Description : A satellite beam that covers almost 42.4% of earths surface. A. Spot beam B. Global beam C. Zone beam D. Hemispheric beam
Last Answer : B. Global beam
Description : The order of a chemical reaction is (A) An experimentally determined quantity (B) Always equal to the total stoichiometric number of reactants (C) Never fractional (D) None of these
Last Answer : (A) An experimentally determined quantity
Description : Which is the proper measurement of average power emitted by a pulsed laser? a. Energy x time b. Pulse energy x repetition rate c. Pulse energy / repetition rate d. Peak power x pulse length
Last Answer : b. Pulse energy x repetition rate
Description : ______ is the measurement of a unilateral antenna properties of directivity A. Phase angle B. Antenna gain C. Beamwidth D. Bandwidth
Last Answer : C. Beamwidth
Description : What is the reference level for noise measurement, F1A weighted? A. -90 dBm B. -82 dBm C. -67 dBm D. -85 dBm
Last Answer : D. -85 dBm
Description : A measurement of -75 dBm, C-message weighted, would be _________ dBrnc. A. 8 B. 7 C. 9 D. 15
Last Answer : D. 15
Description : What is the reference frequency of CCIT phosphomeric noise measurement? A. 800 Hz B. 1000 Hz C. 1500 Hz D. 3400 Hz
Last Answer : A. 800 Hz
Description : What is the reliable measurement for comparing amplifier noise characteristics? A. Thermal agitation noise B. Noise factor C. Noise margin D. Signal-to-noise
Last Answer : B. Noise factor
Description : The use of telecommunication for automatic indicating or recording measurement at the distance from the measuring instrument. A. Monitoring B. Tracking C. Telemetry D. Telecommand
Last Answer : C. Telemetry
Description : The most common unit of noise measurement in white noise testing. A. dBw B. dBk C. dBm D. NPR
Last Answer : D. NPR
Description : What is the reference frequency of CCITT psophometric noise measurement? A. 800 Hz B. 1500 Hz C. 3400 Hz D. 1000 Hz
Description : Fill in the blank. There is _______ correlation between project complexity and project risk. Select one: a. an unknown b. a positive c. no d. a negative e. a general
Last Answer : b. a positive
Description : The sulfa drugs work by _______ with PABA in making folic acid. a. Positive Feedback b. Negative Feedback c. Competitive Inhibition d. Allosteric Inhibition
Last Answer : c. Competitive Inhibition
Description : A flue damper and a vent damper are two examples of _______ a. Combustion air positive shut off devices b. Combustion air negative shut off devices c. Both a. & b. d. None of the above
Last Answer : a. Combustion air positive shut off devices
Description : When adding two mixed numbers is it always necessary to rename the fractional sum explain?
Last Answer : Only if the fraction is improper (greater than one).
Description : Molecularity of a reaction (A) Is always equal to the overall order of reaction (B) May not be equal to the order of reaction (C) Can’t have a fractional value (D) Both (B) and (C
Last Answer : (D) Both (B) and (C
Description : What practical reason could there be for teaching the difference parenthesis make with regard to negative number bases with exponents?
Last Answer : Isn’t this common knowledge that fits in nicely with order of operations? It is what I was always taught.
Description : Will our dogs always bark at imaginary intruders?
Last Answer : Get a collar that punishes them for barking.
Description : What are some practical uses for negative square roots?
Last Answer : It is used in electrical circuit calculations to describe “negative” electrical flow.
Description : In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of (A) Use of non-preheated combustion air (B) Use of pulverised solid ... of fuel & air and infiltration of air (D) Use of excessive positive draft in the furnace
Last Answer : (C) Imperfect mixing of fuel & air and infiltration of air
Description : Would the phrase "Pessimists are always right" reflect a positive or negative attitude?
Last Answer : I say a negative attitude. saying that something is “right” doesn’t make you positive. Positive/negative attitudes are determined on how the person sees the current situation and/or future.
Description : Why can velocity be negative but nonzero speed is always positive?
Last Answer : speed is a scalar quantity with magnitude only but no direction;velocity is a vector with both magnitude (speed) AND direction,which could be positive or negative
Description : Will positive numbers always have a higher absolute value than the negative numbers and WHY?
Last Answer : No.The absolute value is the distance a number is from zero. It isalways represented by a positive number. The absolute value of anypositive number and its negative counterpart is the same.
Description : The total energy of revolving electron in an atom – (1) cannot be negative (2) can have any value above zero (3) can never be positive (4) will always be positive
Last Answer : (3) can never be positive Explanation: The total energy of a revolving electron in any orbit is the sum of its kinetic and potential energies. Energy of an electron at infinite distance from the ... and the energy of electron decreases and thus becomes negative. Thus, it can never be positive.
Description : What is the polarity of voltage at point 'Z' in the circuit shown in the illustration? EL-0085 A. It will always be positive. B. It will always be negative. C. It depends on the instantaneous polarity at point 'W'. D. It cannot be determined without a voltmeter.
Last Answer : Answer: A
Description : Gravitational potential is always A. infinite B. zero C. positive D. negative
Description : Gravitational potential is always A. positive B. negative C. zero D. infinity
Description : Distribution of a report is always restricted when a. Negative assurance is given. b. A review has been performed. c. There is a positive expression of opinion. d. Agreed-upon procedures have been performed
Last Answer : Agreed-upon procedures have been performed
Description : Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because (a) there is a negative pressure in the lungs (b) there is a negative ... there is a positive intrapleural pressure (d) pressure in the lungs is higher than the atmospheric pressure.
Last Answer : (b) there is a negative intrapleural pressure pulling at the lung walls
Description : The heat of combustion of a fuel (A) Is equal to the heat of formation (B) Is always negative (C) Can’t be known without calculating it (D) Is always positive
Last Answer : (B) Is always negative