MCQOPTIONS
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MCQOPTIONS
This section includes 2242 Mcqs, each offering curated multiple-choice questions to sharpen your Php knowledge and support exam preparation. Choose a topic below to get started.
| 1051. |
_________________ laser can be produced when a coupler section is introduced between the amplifier and phase sections of a structure. |
| A. | SG-DBR |
| B. | GCSR |
| C. | Y 4-shifted |
| D. | DSM |
| Answer» C. Y 4-shifted | |
| 1052. |
An effective method to reduce the line-width is to make the cavity longer. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1053. |
Laser cavity length can be extended by ___________ |
| A. | Increasing the refractive index |
| B. | Reducing frequency |
| C. | Introduction of external feedback |
| D. | Using GRIN-rod lenses |
| Answer» D. Using GRIN-rod lenses | |
| 1054. |
_______________ occurs as a result of the change in lasing frequency with gain. |
| A. | Frequency multiplication |
| B. | Dispersion |
| C. | Attenuation |
| D. | Line-width broadening |
| Answer» E. | |
| 1055. |
Which of these factors are critical in affecting the system performance in the case of coherent optical fiber transmission? |
| A. | Laser line-width and stability |
| B. | Refractive index and index difference |
| C. | Core cladding diameter |
| D. | Frequency |
| Answer» B. Refractive index and index difference | |
| 1056. |
What is the name of the axes in the moisture isotherm plotted below? |
| A. | X – Relative humidity Y – Moisture content |
| B. | X – Relative humidity Y – Equilibrium moisture content |
| C. | X – Absolute humidity Y – Moisture content |
| D. | X – Absolute humidity Y – Equilibrium moisture content |
| Answer» D. X – Absolute humidity Y – Equilibrium moisture content | |
| 1057. |
What is the term K in the given equation of multi-molecular adsorption?\(\frac{X}{X_1} =\frac{C\phi}{(1-k\phi)(1+(C-k)\phi)}\) |
| A. | k is the relative humidity |
| B. | k is the exp (± ΔH/RT) |
| C. | k is the moisture content for a complete layer |
| D. | k is the enthalpy difference in adsorptive heats between the first and successive molecular layers |
| Answer» C. k is the moisture content for a complete layer | |
| 1058. |
What is the term X1 in the given equation?\(\frac{X}{X_1} =\frac{C \phi}{(1-k \phi)(1+(C-k) \phi))}\) |
| A. | Equilibrium moisture content |
| B. | Moisture content for a complete layer |
| C. | Moisture content for three layers together |
| D. | Moisture content for a complete monolayer |
| Answer» E. | |
| 1059. |
Consideration of multi-molecular adsorption leads to an equation given below for moisture content. |
| A. | \(\frac{X}{X_1} =\frac{C\phi}{(1-k\phi)(1+(C-k)\phi)}\) |
| B. | \(\frac{X}{X_1} =\frac{C\phi}{(1+k\phi)(1+(C-k)\phi)}\) |
| C. | \(\frac{X}{X_1} =\frac{C\phi}{(1-k\phi)(1-(C-k)\phi)}\) |
| D. | \(\frac{X}{X_1} =\frac{C\phi}{(1-k\phi)(1+(C+k)\phi)}\) |
| Answer» B. \(\frac{X}{X_1} =\frac{C\phi}{(1+k\phi)(1+(C-k)\phi)}\) | |
| 1060. |
Which one of the following isotherm is of prime interest in drying? |
| A. | Langmuir isotherm |
| B. | Desorption isotherm |
| C. | Moisture isotherm |
| D. | Adams’s isotherm |
| Answer» C. Moisture isotherm | |
| 1061. |
Moisture isotherms are normally _________ in shape when plotted over the whole relative humidity range. |
| A. | Sigmoid |
| B. | Exponential |
| C. | Parabolic |
| D. | Hyperbolic |
| Answer» B. Exponential | |
| 1062. |
Isothermal variation of the equilibrium moisture content which is a function of this free-energy change with relative humidity yields a ____________ |
| A. | Langmuir isotherm |
| B. | Moisture isotherm |
| C. | Adams isotherm |
| D. | Pressure isotherm |
| Answer» C. Adams isotherm | |
| 1063. |
The free energy ΔG required to release unit molal quantity of this moisture is given byΔG = – RT Ln(Ψ), for an isothermal, reversible process without change of composition. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1064. |
What is the term Ψ in the given equation of free energy ΔG required to release unit molal quantity of this moisture?ΔG = – RT Ln(Ψ) |
| A. | Absolute Humidity |
| B. | Relative Humidity |
| C. | Mole fraction of water |
| D. | Moisture content |
| Answer» C. Mole fraction of water | |
| 1065. |
The free energy ΔG required to release unit molal quantity of this moisture is given by ___________ |
| A. | – RT Ln(Relative Humidity) |
| B. | – RT Ln(Mole fraction of water) |
| C. | – RT Ln(Moisture content) |
| D. | – RT Ln(Absolute Humidity) |
| Answer» B. – RT Ln(Mole fraction of water) | |
| 1066. |
The lower the relative humidity _________ is the moisture bound to the host material. |
| A. | Weaker |
| B. | Stronger |
| C. | More quantity |
| D. | Less volume |
| Answer» C. More quantity | |
| 1067. |
_________ stairs are now commonly used in all types of construction and in case of a frame structure of reinforced concrete. |
| A. | RCC |
| B. | Brick |
| C. | Stone |
| D. | Metal |
| Answer» B. Brick | |
| 1068. |
The external file escaped stairs are generally made of _______ |
| A. | Wood |
| B. | Stone |
| C. | Metal |
| D. | Brick |
| Answer» D. Brick | |
| 1069. |
____________ steps are in the form of trade and risers of thin stone slabs. |
| A. | Spandril steps |
| B. | Built up steps |
| C. | Rectangular steps |
| D. | Cantilever steps |
| Answer» C. Rectangular steps | |
| 1070. |
In _________ arrangement, the steps are formed of treads only. |
| A. | Tread slab steps |
| B. | Cantilever tread slab steps |
| C. | Spandril steps |
| D. | Rectangular steps |
| Answer» C. Spandril steps | |
| 1071. |
In ____________ arrangement, the treads and Risers of stones are provided is in case of timber steps. |
| A. | Spandril steps |
| B. | Stone steps |
| C. | Cantilever steps |
| D. | Tread and Riser steps |
| Answer» E. | |
| 1072. |
In ___________ arrangement, the steps are triangular in shape and they are cut in such a way so as to obtain aci plain Soffit. |
| A. | Rectangular steps |
| B. | Tread and rise steps |
| C. | Spandril steps |
| D. | Cantilever steps |
| Answer» D. Cantilever steps | |
| 1073. |
In the case of ________ the arrangement is made to show rectangular steps which contain Rebated joint. |
| A. | Spandril steps |
| B. | Tread and Riser steps |
| C. | Cantilever steps |
| D. | Rectangular steps |
| Answer» B. Tread and Riser steps | |
| 1074. |
The __________ to be used for the construction of stairs should be hard and non absorbent and they should possess through resistant to the action of Fire. |
| A. | Wooden blocks |
| B. | Stone |
| C. | Brick |
| D. | Timber |
| Answer» C. Brick | |
| 1075. |
What is the envelope of straight lines given by x cos b + y sin b = a sec b, where b is the parameter? |
| A. | y2 + 4a(a-x) = 0 |
| B. | y + 4ax = 0 |
| C. | y + 4a(a-x) = 0 |
| D. | y2 = 4a(a-x) |
| Answer» E. | |
| 1076. |
What is the envelope of the family of straight lines y = mx +\(\frac{a}{m} \), m is the parameter? |
| A. | y = 4ax |
| B. | y2 = 4ax |
| C. | x = 4ay |
| D. | x2 = 4ay |
| Answer» C. x = 4ay | |
| 1077. |
Find the envelope of the family of lines \(\frac{x}{t} \) + yt = 2c, t being the parameter. |
| A. | xy = c |
| B. | xy = 2c |
| C. | xy = 2 |
| D. | xy = c2 |
| Answer» E. | |
| 1078. |
What is the relation between evolutes and envelopes? |
| A. | Evolutes and envelopes are same |
| B. | Evolute is the envelope of normals to a curve |
| C. | Evolute is the envelope of tangents to a curve |
| D. | Envelope is the evolute of normal to a curve |
| Answer» C. Evolute is the envelope of tangents to a curve | |
| 1079. |
Do concentric circles have an envelope? |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 1080. |
Envelope of a family of curves can be defined as __________ |
| A. | A curve which touches 50% of the family of curves |
| B. | A curve which is a straight line |
| C. | A curve which touches each member of the family of curves |
| D. | A curve which surrounds the family of curves |
| Answer» D. A curve which surrounds the family of curves | |
| 1081. |
Which factor works in conjugation with FEN1? |
| A. | XRCC |
| B. | PCNA |
| C. | Pol beta |
| D. | RPA |
| Answer» C. Pol beta | |
| 1082. |
Which of the following will be seen to resolve the flap in eukaryotic short patch BER? |
| A. | dRPases |
| B. | FEN1 |
| C. | Pol Beta |
| D. | APE1 |
| Answer» D. APE1 | |
| 1083. |
Which of the following can’t be repaired by BER? |
| A. | Abasic sites |
| B. | Deamination |
| C. | CPD |
| D. | Oxidative damage |
| Answer» D. Oxidative damage | |
| 1084. |
Which of the following is not a function of APE1? |
| A. | 5’->3’ exonuclease |
| B. | Generating nick at 5’ end |
| C. | Generating abasic site |
| D. | Improving fidelity of pol beta |
| Answer» D. Improving fidelity of pol beta | |
| 1085. |
Which of the following is not a characteristic of staged combustion cycle compared to other cycles? |
| A. | High fuel efficiency |
| B. | High engine specific impulse |
| C. | Engineering simplicity |
| D. | Use of preburners |
| Answer» D. Use of preburners | |
| 1086. |
Which of the following engines uses a staged combustion cycle? |
| A. | Vinci |
| B. | Pratt & Whitney RL10 |
| C. | Ariane 6 |
| D. | SpaceX Raptor |
| Answer» E. | |
| 1087. |
Which of the following cycles is used in RL10 hydrogen/oxygen rocket engine? |
| A. | Expander cycle |
| B. | Gas generator cycle |
| C. | Staged-combustion cycle |
| D. | Combustion tap-off cycle |
| Answer» B. Gas generator cycle | |
| 1088. |
In gas generator cycles, the turbine inlet gas is obtained from a portion of exhaust gases about to pass through the rocket nozzle. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1089. |
Open cycles perform better than closed cycle in a turbopump feed type rocket engine. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1090. |
Closed cycles in turbopump feed systems are also called as ____________ |
| A. | open cycle |
| B. | engine cycle |
| C. | topping cycle |
| D. | bottoming cycle |
| Answer» D. bottoming cycle | |
| 1091. |
In turbopump feed systems, the turbines derive their power from _______________ |
| A. | expansion of hot gases |
| B. | expansion of cold gases |
| C. | compression of hot gases |
| D. | compression of cold gases |
| Answer» B. expansion of cold gases | |
| 1092. |
In turbopump feed systems, the pressurization of the propellants is done by ____________ and they are driven by ____________ |
| A. | turbines; pumps |
| B. | pumps; turbines |
| C. | pumps; pumps |
| D. | turbines; turbines |
| Answer» C. pumps; pumps | |
| 1093. |
Carbon is intended to be mixed in small amounts in the weld, in carbon arc welding. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1094. |
A smooth and regular bead cannot be formed in metal arc welding. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1095. |
What is the temperature of the positive electrode in metal arc welding? |
| A. | 2300°C |
| B. | 2400°C |
| C. | 2500°C |
| D. | 2600°C |
| Answer» E. | |
| 1096. |
What is the temperature at the positive terminal in carbon arc welding? |
| A. | 3800°C |
| B. | 3900°C |
| C. | 4000°C |
| D. | 4100°C |
| Answer» C. 4000°C | |
| 1097. |
Why is carbon used in carbon arc welding? |
| A. | Generation of more heat at electrode tip |
| B. | Generation of less heat at electrode tip |
| C. | Provides coating |
| D. | Fixed polarity is maintained |
| Answer» C. Provides coating | |
| 1098. |
Total reflection X-ray fluorescence spectrometer is attractive for elements which lack reliable wet chemical methods. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1099. |
In computer-controlled corrective iteration method, which of the following is used to estimate absorption corrections? |
| A. | Initial raw intensity data |
| B. | Elemental composition |
| C. | Amount of sample |
| D. | Amount of radiation |
| Answer» B. Elemental composition | |
| 1100. |
Computer-controlled corrective iteration is the only reliable method of matrix effects correction. |
| A. | True |
| B. | False |
| Answer» B. False | |