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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.
| 51. |
Which of the following are commonly used in anti-freeze materials? |
| A. | denatured alcohol |
| B. | wood alcohol |
| C. | glycerin |
| D. | all of the mentioned |
| Answer» E. | |
| 52. |
The coolant to be employed in liquid cooling system should have ______________ |
| A. | low freezing temperature |
| B. | a high boiling point |
| C. | a large latent heat of vaporisation |
| D. | all of the mentioned |
| Answer» E. | |
| 53. |
In liquid cooling, the cylinder walls and heads are provided with jackets through which the cooling liquid can circulate. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 54. |
which of the following is the reactant precursor for the given product? |
| A. | I and III |
| B. | II and III |
| C. | III and IV |
| D. | I and II |
| Answer» E. | |
| 55. |
What will be the product of the following reaction? |
| A. | Ethyl acetoacetate |
| B. | Methyl acetoacetate |
| C. | Propyl acetoacetate |
| D. | Butyl acetoacetate |
| Answer» B. Methyl acetoacetate | |
| 56. |
If f(t)=\(\frac{1}{b}e^{at}sinh(bt)\), then its Laplace transform is?a) 1/sb) Indeterminatec) \(\frac{b}{(s-a)^2-b^2}\) d) \(f(t)=\frac{1}{(s- |
| A. | 1/s |
| B. | Indeterminate |
| C. | \(\frac{b}{(s-a)^2-b^2}\) |
| D. | \(f(t)=\frac{1}{(s-a)^2-b^2}\) |
| Answer» E. | |
| 57. |
f(t) = t, then its Laplace transform is? |
| A. | \(\frac{(s)sin(b)+acos(b)}{s^2+a^2}\) |
| B. | +acos(b)}{s^2+a^2}\) b) \(\frac{2as^2}{(s^2+a^2)^2}\) |
| C. | \(\frac{\Gamma(p+1)}{s^{p+1}}\) |
| D. | 1/s2 |
| Answer» E. | |
| 58. |
If f(t) = u(t), then its Laplace transform is?a) \(\frac{scos(b)-asin(b)}{s^2+a^2}\) b) 1/2c) \(\frac{s}{s^2-a^2}\) d) \(\frac{b}{(s- |
| A. | \(\frac{scos(b)-asin(b)}{s^2+a^2}\) |
| B. | -asin(b)}{s^2+a^2}\) b) 1/2 |
| C. | \(\frac{s}{s^2-a^2}\) |
| D. | \(\frac{b}{(s-a)^2+b^2}\) |
| Answer» C. \(\frac{s}{s^2-a^2}\) | |
| 59. |
If f(t) = te-at, then its Laplace transform is?a) \(\frac{1}{(s+ |
| A. | \(\frac{1}{(s+a)^2}\) b) \(\frac{2a}{(s- |
| B. | \(\frac{2a}{(s-b)^2+b^2}\) |
| C. | \(\frac{a^3}{s^2+a^2)^2}\) |
| D. | Indeterminate |
| Answer» B. \(\frac{2a}{(s-b)^2+b^2}\) | |
| 60. |
If f(t) = δ(t), then its Laplace transform is?a) s + a ⁄ (s – |
| A. | s + a ⁄ (s – a)2 + b2 |
| B. | a3 ⁄ (s2 + a2)2 |
| C. | 1 |
| D. | Does not exist |
| Answer» D. Does not exist | |
| 61. |
If f(t) = t⁄2 a sinat, then its Laplace transform is?a) b ⁄ (s + |
| A. | b ⁄ (s + a)2 + b2b) 2a ⁄ (s – |
| B. | 2a ⁄ (s – b)2 + b2 |
| C. | Indeterminate |
| D. | s ⁄ (s2 + a2)2 |
| Answer» E. | |
| 62. |
If f(t) = 1 ⁄ √Πt, then its Laplace transform is?a) \(\frac{s^2-a^2}{(s-a)^2}\) b) S-1/2c) \(\frac{n!}{(s-a)^{n-1}}\) d) \(\frac{n!}{(s- |
| A. | \(\frac{s^2-a^2}{(s-a)^2}\) |
| B. | S-1/2 |
| C. | \(\frac{n!}{(s-a)^{n-1}}\) |
| D. | \(\frac{n!}{(s-a)^{n-1}}\) |
| Answer» C. \(\frac{n!}{(s-a)^{n-1}}\) | |
| 63. |
If f(t) = tn ⁄ n, then its Laplace transform is?a) \(\frac{s+a}{(s-a)}{(s-a)^2+b^2}\) b) \(\frac{b^2}{(s-a)}{(s- |
| A. | \(\frac{s+a}{(s-a)}{(s-a)^2+b^2}\) |
| B. | \(\frac{b^2}{(s-a)}{(s-a)^2+b^2}\) |
| C. | \(\frac{2a^3}{(s^2+a^2)}\) |
| D. | \(\frac{(n-1)!}{s^{n+1}}\) |
| Answer» E. | |
| 64. |
If f(t) = 1⁄a sinh(at), then its Laplace transform is?a) 1⁄s2-a2b) 2a ⁄ (s – b)2 + b2c) n! ⁄ (s – |
| A. | 1⁄s2-a2b) 2a ⁄ (s – |
| B. | 2a ⁄ (s – b)2 + b2 |
| C. | n! ⁄ (s – a)n-1 |
| D. | Does not exist |
| Answer» B. 2a ⁄ (s – b)2 + b2 | |
| 65. |
If f(t) = eat sinh(bt) then its Laplace transform is?a) e-as ⁄ sb) s+a ⁄ (s – a)2 + b2c) b ⁄ (s – |
| A. | e-as ⁄ s |
| B. | s+a ⁄ (s – a)2 + b2 |
| C. | b ⁄ (s – a)2 – b2 |
| D. | Does not exist |
| Answer» D. Does not exist | |
| 66. |
If f(t) = eat cos(bt), then its Laplace transform is?a) 2a3 ⁄ (s2 + a2)b) s+a ⁄ s-ac) Indeterminated) s-a ⁄ (s – |
| A. | 2a3 ⁄ (s2 + a2) |
| B. | s+a ⁄ s-a |
| C. | Indeterminate |
| D. | s-a ⁄ (s – a)2 + b2 |
| Answer» E. | |
| 67. |
If f(t) = eat sin(bt), then its Laplace transform is given by?a) s2-a2 ⁄ (s – a)2b) b ⁄ (s + a)2 + b2c) b ⁄ (s – |
| A. | s2-a2 ⁄ (s – a)2 |
| B. | b ⁄ (s + a)2 + b2 |
| C. | b ⁄ (s – a)2 + b2 |
| D. | Indeterminate |
| Answer» D. Indeterminate | |
| 68. |
If f(t) = coshat, its Laplace transform is given by? |
| A. | s ⁄ s2-a2 |
| B. | s+a ⁄ s-a |
| C. | Indeterminate |
| D. | (sinh(at))2 |
| Answer» B. s+a ⁄ s-a | |
| 69. |
If f(t) = sinhat, then its Laplace transform is? |
| A. | eat |
| B. | s ⁄ s2-a2 |
| C. | a ⁄ s2-a2 |
| D. | Exists only if ‘t’ is complex |
| Answer» D. Exists only if ‘t’ is complex | |
| 70. |
Why Shape and texture of aggregates is a must? |
| A. | Smooth surfaces give better workability |
| B. | Smooth surfaces give poor workability |
| C. | Rough surfaces give better workability |
| D. | Rough surfaces give poor workability |
| Answer» B. Smooth surfaces give poor workability | |
| 71. |
Adding water increases __________ |
| A. | Workability |
| B. | Strength |
| C. | Fame |
| D. | Quality |
| Answer» B. Strength | |
| 72. |
A compaction factor of .85 for a cement concrete sample indicates ___________ |
| A. | Low workability |
| B. | Medium workability |
| C. | Good workability |
| D. | Very good workability |
| Answer» B. Medium workability | |
| 73. |
Workability of concrete is inversely proportional to __________ |
| A. | Grading of the aggregates |
| B. | Time of transit |
| C. | Aggregates cement ratio |
| D. | Water cement ratio |
| Answer» E. | |
| 74. |
Workability of concrete is directly proportional to __________ |
| A. | Grading of the aggregates |
| B. | Time of transit |
| C. | Aggregates cement ratio |
| D. | Water cement ratio |
| Answer» B. Time of transit | |
| 75. |
Workability of concrete can be improved by __________ |
| A. | More sand |
| B. | More cement |
| C. | More fine aggregates |
| D. | Fineness of coarse aggregate |
| Answer» C. More fine aggregates | |
| 76. |
Workability of concrete can be improved by the addition of __________ |
| A. | Iron |
| B. | Sodium |
| C. | Zinc |
| D. | Sulphur |
| Answer» D. Sulphur | |
| 77. |
What do you mean by workability? |
| A. | ASTM C 125 defines workability as the property determining the effort required to manipulate a freshly mixed quantity of concrete with a maximum loss of homogeneity |
| B. | ASTM C 125 defines workability as the property determining the effort required to manipulate a freshly mixed quantity of concrete with minimum loss of heterogeneity |
| C. | The strict definition of workability is the amount of useful external work, against the external friction between the individual particles in the concrete, necessary to produce full compaction |
| D. | The workability is also defined as the ease with which a freshly mixed concrete can be properly compacted and also that it can be transported, placed, and finished |
| Answer» E. | |
| 78. |
If co-incorporation probabilities are given as p,o 0.1; o,r 0.02 ; p,r 0.15. What is the gene order |
| A. | o r p |
| B. | o p r |
| C. | r o p |
| D. | Can’t be determined due to insufficient data |
| Answer» C. r o p | |
| 79. |
Probability of incorporation of a gene P is 0.2 and the probability of incorporation of another gene is 0.1. The probability of both being incorporated is seen experimentally to be equal to 0.1. What is our inference? |
| A. | Both the genes are incorporated randomly |
| B. | The genes are linked |
| C. | The bacteria has a preference for the two gene |
| D. | It was just an artifact |
| Answer» C. The bacteria has a preference for the two gene | |
| 80. |
In an experiment you have a U-Tube with two strains of bacteria in two arms. In one arm the bacteria are Gal+ and His-, in other the strain is Gal- and His+. If the two arms are joined by a membrane that doesn’t allow bacterial cells to pass to opposite site what will you observe when you plate each arm bacterial strain on minimal media? |
| A. | None will grow |
| B. | Some colonies seen in right arm |
| C. | Some colonies seen in left arm |
| D. | Some colonies seen in both arms |
| Answer» E. | |
| 81. |
Which of the following nav-right value is used to the inherits this property from its parent element? |
| A. | auto |
| B. | id |
| C. | target-name |
| D. | inherit |
| Answer» E. | |
| 82. |
Which of the following CSS3 property specifies where to navigate when using the arrow-right navigation key? |
| A. | right |
| B. | nav-right |
| C. | nav-side |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 83. |
Which of the following CSS3 property specifies where to navigate when using the arrow-up navigation key? |
| A. | nav-upper |
| B. | nav-top |
| C. | nav-up |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 84. |
Which of the following nav-left value sets it’s value to default value? |
| A. | target-name |
| B. | id |
| C. | inital |
| D. | inherit |
| Answer» D. inherit | |
| 85. |
Which of the following CSS3 property is used to tell the browser what the sizing properties should be include? |
| A. | box-sizing |
| B. | box-model |
| C. | box-design |
| D. | box-redesign |
| Answer» B. box-model | |
| 86. |
What is the standard post-closure care period? |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» D. 40 | |
| 87. |
After completing closure operations facility has _________ days to inform EPA. |
| A. | 20 |
| B. | 40 |
| C. | 60 |
| D. | 80 |
| Answer» D. 80 | |
| 88. |
After landfill unit receives last shipment of hazardous waste, it has __________ days to commence closure. |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» D. 40 | |
| 89. |
Facilities with tanks and boilers should notify EPA 60 days prior before closure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 90. |
Facilities with landfills and land treatment units are required to notify the EPA ________ days prior to the date they intend to begin partial or final closure. |
| A. | 20 |
| B. | 40 |
| C. | 60 |
| D. | 80 |
| Answer» D. 80 | |
| 91. |
Interim status facilities must have written closure plans within _______ months before closure. |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 92. |
Removing all wastes from the waste management unit and decontaminate or remove all equipment is known as _______ closure. |
| A. | Partial |
| B. | Full |
| C. | Clean |
| D. | Decontaminate |
| Answer» D. Decontaminate | |
| 93. |
In a multiple HW management facility, ceasing only one unit operation which others remain intact is known as _______ closure. |
| A. | Partial |
| B. | Complete |
| C. | Half |
| D. | Final |
| Answer» B. Complete | |
| 94. |
Part 265 of closure and post-closure rules are applied to _________ |
| A. | Industries |
| B. | Facilities |
| C. | Permitted facilities |
| D. | Facilities before rules adopted |
| Answer» E. | |
| 95. |
Part 264 of closure and post-closure rules are applied to _________ |
| A. | Industries |
| B. | Facilities |
| C. | Permitted facilities |
| D. | TSDF |
| Answer» D. TSDF | |
| 96. |
The requirements for closure and post-closure activities are entitled in CFR _______ and _______ |
| A. | 264, 265 |
| B. | 265, 266 |
| C. | 266, 267 |
| D. | 267, 268 |
| Answer» B. 265, 266 | |
| 97. |
When a hazardous waste management unit stops receiving waste and reaches the end of its active life it must be closed according to RCRA. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 98. |
The transmission coefficient of a wave travelling through two media having electric intrinsic impedances of 3 and 2 respectively is |
| A. | 2⁄2 |
| B. | 8⁄9 |
| C. | 4⁄5 |
| D. | 1⁄4 |
| Answer» D. 1⁄4 | |
| 99. |
The reflection coefficient of a wave travelling through two media having magnetic intrinsic impedances of 2 and 1 respectively is |
| A. | 1⁄2 |
| B. | 1⁄3 |
| C. | 1⁄4 |
| D. | 1⁄5 |
| Answer» C. 1⁄4 | |
| 100. |
The reflection coefficient of a wave travelling through two media having electric intrinsic impedances of 3 and 5 respectively is |
| A. | 2 |
| B. | 8 |
| C. | 5⁄3 |
| D. | 1/4 |
| Answer» E. | |