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MCQOPTIONS
This section includes 2167 Mcqs, each offering curated multiple-choice questions to sharpen your Php knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Refer to Q3, and estimate what is the total amount of heat (kcal) that must be removed by the cooling coil when this conversion is reached?Using the following equation:Q ̇= ΔHR r VR |
| A. | -2.3 × 104 kcal |
| B. | -2.2 × 104 kcal |
| C. | -2.4 × 104 kcal |
| D. | -2.6 × 104 kcal |
| Answer» B. -2.2 × 104 kcal | |
| 552. |
The exothermic elementary liquid-phase reaction is as below:is carried out in a batch reactor with a cooling coil to keep the reactor isothermal at 27°C. The reactor is initially charged with equal concentrations of A and B and no C, cAo = cBo = 2.0 mol/L, cCo = 0.Additional data:Rate constant, k = 0.01725 L/mol. min, at 27°CHeat of reaction, ΔHR = -10 kcal/mol A, at 27°CPartial molar heat capacities, \(\bar{C}_{PA} = \bar{C}_{PB} \) = 20 cal/mol. K, \(\bar{C}_{PC}\) = 40 cal/mol KReactor volume, VR = 1200 LHow long does it take to reach 95% conversion? |
| A. | 550 min |
| B. | 552 min |
| C. | 553 min |
| D. | 551 min |
| Answer» E. | |
| 553. |
A boat has a thermo-server attached to it. While floating with the fluid, it measures the temperature of the fluid. Both flow and temperature are under unsteady-state condition:T (x, y, z, t) = x2 + yz + t\(\vec{V}(x, y, z, t) = 2xi + 2 t^2y\hat{j} + \hat{k}\) Determine the rate of change of the temperature recorded by the sensor at t = 1, when the boat flows past the location, whose spatial co-ordinates are 2i + j + k.DT/ dt = \(\frac{\partial T}{\partial t} + (V.\nabla) T\) \(\frac{\partial T}{\partial t} = 1\) \(\frac{\partial T}{\partial x} = 2x; \frac{\partial T}{\partial y} = z; \frac{\partial T}{\partial z} = y\) Here, (x, y, z) = (2, 1, 1) |
| A. | T\) \(\frac{\partial T}{\partial t} = 1\) \(\frac{\partial T}{\partial x} = 2x; \frac{\partial T}{\partial y} = z; \frac{\partial T}{\partial z} = y\) Here, (x, y, z) = (2, 1, 1)a) 30 |
| B. | 25 |
| C. | 20 |
| D. | 35 |
| Answer» D. 35 | |
| 554. |
“Chemical reactions or phase changes occur” is this statement applicable for unsteady state energy balance? |
| A. | True |
| B. | False |
| Answer» C. | |
| 555. |
Which of the following operations involved in mechanical treatment of steel is used to make wires and rods? |
| A. | Forging |
| B. | Drawing |
| C. | Pressing |
| D. | Rolling |
| Answer» C. Pressing | |
| 556. |
Which process is used to make the steel soft? |
| A. | Hardening |
| B. | Nitriding |
| C. | Annealing |
| D. | Cementing |
| Answer» D. Cementing | |
| 557. |
___________ is the process of saturating the surface layer of steel with nitrogen by heating. |
| A. | Nitriding |
| B. | Normalising |
| C. | Nitrating |
| D. | Tempering |
| Answer» B. Normalising | |
| 558. |
Which of the following is not a property of hard steel? |
| A. | Hard steel can be readily forged and welded |
| B. | It rusts easily |
| C. | Hard steel can be magnetised permanently |
| D. | The specific gravity of hard steel is 7.90 |
| Answer» B. It rusts easily | |
| 559. |
Which of the following is not a property of mild steel? |
| A. | Mild steel is ductile and malleable |
| B. | It can be used for all types of structural work |
| C. | It cannot be magnetised permanently |
| D. | Mild steel can be easily forged and welded |
| Answer» D. Mild steel can be easily forged and welded | |
| 560. |
Which of the following statements about ribbed-torsteel bars is false? |
| A. | They possess excellent bonding properties |
| B. | They can be easily identified |
| C. | They serve as efficient concrete reinforcement |
| D. | Ordinary plain round bars posses better structural properties than these bars |
| Answer» E. | |
| 561. |
Cold shortness is a defect occurring in steel due to the presence of an excess amount of ___________ |
| A. | Potassium |
| B. | Phosphorus |
| C. | Sodium |
| D. | Magnesium |
| Answer» C. Sodium | |
| 562. |
The structure of blister steel is homogeneous and is used for making edge tools. |
| A. | True |
| B. | False |
| Answer» C. | |
| 563. |
Which of the following forms of steel is popularly known as rolled steel joist or beam? |
| A. | I-section |
| B. | Expanded metal |
| C. | Corrugated sheet |
| D. | Channel section |
| Answer» B. Expanded metal | |
| 564. |
Red shortness is a defect occurring in steel due to the presence of an excess amount of ___________ |
| A. | Sulphur |
| B. | Phosphorus |
| C. | Sodium |
| D. | Calcium |
| Answer» B. Phosphorus | |
| 565. |
In dissolved mineral salts ___________ gets converted into the bicarbonates by the action of carbondioxide by water. |
| A. | Carbonate of calcium |
| B. | Carbonates of magnesium |
| C. | Carbonates of calcium and magnesium |
| D. | Neither carbonates of calcium nor magnesium |
| Answer» D. Neither carbonates of calcium nor magnesium | |
| 566. |
How many types of absorbed impurities in water are there mainly? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 567. |
The suspended impurities is negligible due to the filtering action of __________ |
| A. | Water plants |
| B. | Dissolved impurities |
| C. | Soil |
| D. | Dissolved gases |
| Answer» D. Dissolved gases | |
| 568. |
Surface water appears turbid due to the presence of the __________ which remains suspended in the water. |
| A. | Impurities |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Water plants |
| Answer» B. Oxygen | |
| 569. |
The quantity of water available for the actual use is _________ |
| A. | 10% |
| B. | 5% |
| C. | 0.5% |
| D. | 1% |
| Answer» D. 1% | |
| 570. |
Dimensions can be placed anywhere irrespective of the features visible. |
| A. | True |
| B. | False |
| Answer» C. | |
| 571. |
Extension lines should start from which part of the drawing? |
| A. | Away from the outlines |
| B. | From inside the views |
| C. | No need for extension lines |
| D. | Outlines of the view |
| Answer» E. | |
| 572. |
A chamfer of 3mm thick and angle 45˚ inclination is dimensioned as _____ |
| A. | 45˚ x 3 |
| B. | 3 x 45˚ |
| C. | 45˚ |
| D. | 3mm |
| Answer» C. 45˚ | |
| 573. |
How is tapped hole of diameter 10mm with 20mm dimensioned? |
| A. | M10 |
| B. | M10, 20 |
| C. | M10, DEEP 20 |
| D. | M10 20 mm deep |
| Answer» D. M10 20 mm deep | |
| 574. |
What is the minimum number of arguments after the following operation occurs in any function? |
| A. | 0 |
| B. | 1 |
| C. | -2 |
| D. | ErrorView Answer |
| Answer» B. 1 | |
| 575. |
The following operation results in |
| A. | Error due to NaN |
| B. | Syntactical error |
| C. | Logical Error |
| D. | Nothing happensView Answer |
| Answer» E. | |
| 576. |
The following operation result in |
| A. | Error due to Inf |
| B. | The range of the varargin array becomes (44,Inf) |
| C. | The range of the varargin array becomes (45,Inf) |
| D. | The range of the varargin array becomes [45,Inf] View Answer |
| Answer» C. The range of the varargin array becomes (45,Inf) | |
| 577. |
The following operation results in? |
| A. | Error due to Inf |
| B. | Limits the length of nargin from 2 to Inf |
| C. | Logical Error |
| D. | Limits the length of varargin from 1 to InfView Answer |
| Answer» E. | |
| 578. |
The nargoutchk command limits the length of which cellular array? |
| A. | varargout |
| B. | i(2) |
| C. | random(69) |
| D. | laplace(s) |
| Answer» B. i(2) | |
| 579. |
The narginchk command can limit the size of which cellular array? |
| A. | fun |
| B. | rand(2) |
| C. | eye(3) |
| D. | varargin |
| Answer» E. | |
| 580. |
What is the output of the following command? |
| A. | Syntactical Error |
| B. | Yo, G! |
| C. | input error |
| D. | 2 3 4 5View Answer |
| Answer» D. 2 3 4 5View Answer | |
| 581. |
The working of the varargin command is dependent on the nargin command implicitly. |
| A. | True |
| B. | False |
| Answer» C. | |
| 582. |
Which operator among the following must be overloaded using the friend function? |
| A. | << operator only |
| B. | >> operator only |
| C. | Both << and >> operators |
| D. | It’s not mandatory to use friend function in any case |
| Answer» D. It’s not mandatory to use friend function in any case | |
| 583. |
All the operators can be overloaded using the member function operator overloading. |
| A. | True |
| B. | False |
| Answer» C. | |
| 584. |
Which operator among the following can be overloading using only member function? |
| A. | Assignment operator |
| B. | Addition operator |
| C. | Subtraction operator |
| D. | Multiplication and division operator |
| Answer» B. Addition operator | |
| 585. |
Where in the parameter list is the implicit *this is added? |
| A. | Right most parameter |
| B. | Anywhere in parameter list |
| C. | Left most parameter |
| D. | Not added to parameter list |
| Answer» D. Not added to parameter list | |
| 586. |
When the friend operator overloading is converted into member operator overloading _______________ |
| A. | Two parameters of friend function remains same parameters in member operator overloading |
| B. | Two parameters of friend function becomes only one parameter of member function |
| C. | Two parameters of friend function are removed while using member function |
| D. | Two parameters of friend function are made 4 in member operator overloading |
| Answer» C. Two parameters of friend function are removed while using member function | |
| 587. |
If left operand member is specified directly in the function definition, which is the correct implicit conversion of that syntax? |
| A. | *this className |
| B. | *this parameterObject |
| C. | *this returnedObject |
| D. | *this object |
| Answer» E. | |
| 588. |
Which object’s members can be called directly while overloading operator function is used (In function definition)? |
| A. | Left operand members |
| B. | Right operand members |
| C. | All operand members |
| D. | None of the members |
| Answer» B. Right operand members | |
| 589. |
Why the left parameter is removed from parameter list? |
| A. | Because it is of no use |
| B. | Because it is never used in definitions |
| C. | Because it becomes parameter pointed by *this |
| D. | Because it can’t be referred by *this pointer |
| Answer» D. Because it can’t be referred by *this pointer | |
| 590. |
What is the syntax to overload an operator? |
| A. | className::operator<operatorSymbol>(parameters) |
| B. | className:operator<operatorSymbol>(parameters) |
| C. | className.operator<operatorSymbol>(paramteres) |
| D. | className->operator<operatorSymbol>(parameters) |
| Answer» B. className:operator<operatorSymbol>(parameters) | |
| 591. |
If a friend overloaded operator have to be changed to member overloaded operator, which operator should be used with the class name? |
| A. | Scope resolution operator |
| B. | Colon |
| C. | Arrow operator |
| D. | Dot operator |
| Answer» B. Colon | |
| 592. |
If the left operand is pointed by *this pointer, what happens to other operands? |
| A. | Other operands are passed as function return type |
| B. | Other operands are passed to compiler implicitly |
| C. | Other operands must be passed using another member function |
| D. | Other operands are passed as function arguments |
| Answer» E. | |
| 593. |
When the operator to be overloaded becomes the left operand member then ______________ |
| A. | The right operand acts as implicit object represented by *this |
| B. | The left operand acts as implicit object represented by *this |
| C. | Either right or left operand acts as implicit object represented by *this |
| D. | *this pointer is not applicable in that member function |
| Answer» C. Either right or left operand acts as implicit object represented by *this | |
| 594. |
Which among the following is mandatory condition for operators overloading? |
| A. | Overloaded operator must be member function of the left operand |
| B. | Overloaded operator must be member function of the right operand |
| C. | Overloaded operator must be member function of either left or right operand |
| D. | Overloaded operator must not be dependent on the operands |
| Answer» B. Overloaded operator must be member function of the right operand | |
| 595. |
Which among the following are valid ways of overloading the operators? |
| A. | Only using friend function |
| B. | Only using member function |
| C. | Either member functions or friend functions can be used |
| D. | Operators can’t be overloaded |
| Answer» D. Operators can’t be overloaded | |
| 596. |
How many minimum numbers of zeros are there in ‘3 x 3’ triangular matrix? |
| A. | 4 |
| B. | 3 |
| C. | 5 |
| D. | 6 |
| Answer» C. 5 | |
| 597. |
Which one of the following is the correct notation of a matrix with ‘m’ rows and ’n’ columns? |
| A. | m + n |
| B. | m – n |
| C. | m x n |
| D. | m/n |
| Answer» D. m/n | |
| 598. |
Reversing the order in which a sequence of transformations is performed may affect the transformed position of an object. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 599. |
Reflection about the line y=0, the axis, is accomplished with the transformation matrix with how many elements as ‘0’? |
| A. | 8 |
| B. | 9 |
| C. | 4 |
| D. | 6 |
| Answer» E. | |
| 600. |
Two successive translations are___________________ |
| A. | Multiplicative |
| B. | Inverse |
| C. | Subtractive |
| D. | Additive |
| Answer» E. | |