MCQOPTIONS
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MCQOPTIONS
This section includes 109 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Science knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
_______ valves are used to discharge air from the water pipelines. |
| A. | Air relief valve |
| B. | Sluice valve |
| C. | Pressure relief valve |
| D. | Altitude valve |
| Answer» B. Sluice valve | |
| 52. |
Which of the following joint is highly influenced by temperature? |
| A. | Tyton joint |
| B. | Coupled joint |
| C. | Spigot and socket joint |
| D. | Expansion joint |
| Answer» E. | |
| 53. |
The pre-stressed concrete pipes are used for heads ____ |
| A. | <8m |
| B. | <61m |
| C. | >60m |
| D. | <35m |
| Answer» D. <35m | |
| 54. |
If the diameter of pumping mains decreases, then the total dynamic head will increase. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 55. |
Which of the following pump is based on the type of power? |
| A. | Low lift pump |
| B. | High lift pump |
| C. | Air lift pump |
| D. | Steam engine pump |
| Answer» E. | |
| 56. |
The velocity of water in a 10 cm diameter pipe should be ____________ |
| A. | 0.2m/Sec |
| B. | 0.5m/Sec |
| C. | 0.9m/Sec |
| D. | 1.2m/Sec |
| Answer» D. 1.2m/Sec | |
| 57. |
Horizontally cast iron pipes are called _________ |
| A. | Mcwane pipes |
| B. | Pit cast pipes |
| C. | Galvanized iron pipes |
| D. | Wrought iron pipes |
| Answer» B. Pit cast pipes | |
| 58. |
Which of the following is also known as a check valve? |
| A. | Scour valve |
| B. | Pressure relief valve |
| C. | Altitude valve |
| D. | Reflux valve |
| Answer» E. | |
| 59. |
Which of the following valve is known as a safety valve? |
| A. | Scour valve |
| B. | Pressure relief valve |
| C. | Reflux valve |
| D. | Altitude valve |
| Answer» C. Reflux valve | |
| 60. |
Lead pipes are used in water supply mains. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 61. |
_______ is the point of intersection of system head curve with the characteristic curve of the pump. |
| A. | Discharge point |
| B. | Operating point |
| C. | Velocity head |
| D. | Pumping point |
| Answer» C. Velocity head | |
| 62. |
Consider the following statements.i. Capacity of the pumpii. Number of pump unitsiii. Discharge conditionThe selection of a particular type of pump depends on which of the following? |
| A. | i, ii, iii |
| B. | i only |
| C. | ii, iii |
| D. | i, iii |
| Answer» B. i only | |
| 63. |
In which of the following joint, pipes do not have sockets or spigots? |
| A. | Tyton joint |
| B. | Coupled joint |
| C. | Spigot and socket joint |
| D. | Expansion joint |
| Answer» C. Spigot and socket joint | |
| 64. |
Which of the following stress in pipe depends on temperature? |
| A. | Internal water pressure |
| B. | Stress due to foundation reaction |
| C. | Longitudinal stress |
| D. | Temperature stress |
| Answer» E. | |
| 65. |
Which part of centrifugal well pumps prevents the back flow through the pump? |
| A. | Delivery pipe |
| B. | Foot valve |
| C. | Strainer |
| D. | Check valve |
| Answer» E. | |
| 66. |
The unit of specific speed is _____________ |
| A. | Metre/second |
| B. | Metre/second² |
| C. | Centimetre/second |
| D. | Dimensionless |
| Answer» E. | |
| 67. |
The plot of total dynamic head and discharge of a pump is called ____________ |
| A. | Dynamic head curve |
| B. | System head curve |
| C. | Pump curve |
| D. | Discharge curve |
| Answer» C. Pump curve | |
| 68. |
Quintuplex pump has a crank of ____ |
| A. | 60° |
| B. | 72° |
| C. | 120° |
| D. | 1800° |
| Answer» C. 120° | |
| 69. |
Consider the following statement regarding Reciprocating pump.i. High initial costii. Requires a small spaceiii. Less power requiredWhich of the following is/are incorrect statements? |
| A. | Only 1 |
| B. | Only 2 |
| C. | Only 3 |
| D. | 2, 3 |
| Answer» E. | |
| 70. |
The number of valves required in rotary pump is _____________ |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 71. |
Which type of pump is specifically used for shallow wells? |
| A. | Hand pump |
| B. | Reciprocating pump |
| C. | Jet pump |
| D. | Centrifugal pump |
| Answer» B. Reciprocating pump | |
| 72. |
Which of the following pump is not an example of well pump? |
| A. | Hand pumps |
| B. | Steam engine pumps |
| C. | Jet pumps |
| D. | Centrifugal pumps |
| Answer» C. Jet pumps | |
| 73. |
The speed at which the reciprocating pump runs (in m/min) is _____________ |
| A. | 28 |
| B. | 90 |
| C. | 100 |
| D. | 120 |
| Answer» B. 90 | |
| 74. |
In which type of pump, the liquid is in contact with both sides of the plunger? |
| A. | Single acting reciprocating pump |
| B. | Double acting reciprocating pump |
| C. | Single cylinder pump |
| D. | Booster pump |
| Answer» C. Single cylinder pump | |
| 75. |
The maximum efficiency of a reciprocating pump is _____________ |
| A. | 50% |
| B. | 60% |
| C. | 85% |
| D. | 100% |
| Answer» D. 100% | |
| 76. |
Based on the number of cylinders, the reciprocating pump is divided into ____ types. |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 77. |
Which type of reciprocating pump has a 1200 crank? |
| A. | Single cylinder pump |
| B. | Double cylinder pump |
| C. | Triple cylinder pump |
| D. | Duplex double action pump |
| Answer» D. Duplex double action pump | |
| 78. |
The advance version of volute chamber is designed by _____________ |
| A. | V. Richardson |
| B. | J. Thomson |
| C. | Darcy Weisbach |
| D. | Bernoulli |
| Answer» C. Darcy Weisbach | |
| 79. |
Consider the following statements regarding vortex chamber.i. Reduce the velocity of the pumpii. Convert pressure energy into kinetic energyiii. Decrease the efficiency of the pumpWhich of the above statement is correct? |
| A. | Only i |
| B. | Only ii |
| C. | Only iii |
| D. | i, ii, iii |
| Answer» B. Only ii | |
| 80. |
A diffuser pump is also called as _______ pump. |
| A. | Reciprocating pump |
| B. | Volute pump |
| C. | Turbine pump |
| D. | Rotary pump |
| Answer» D. Rotary pump | |
| 81. |
The each stage in centrifugal pump increase the head by ______________ |
| A. | 10m |
| B. | 20m |
| C. | 30m |
| D. | 60m |
| Answer» D. 60m | |
| 82. |
Depending on the number of impellers, the centrifugal pump is divided into ______________ types. |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Six |
| Answer» B. Three | |
| 83. |
The speed at which the centrifugal pump runs (in r.p.m) is _____________ |
| A. | 200 |
| B. | 300 |
| C. | 500 |
| D. | 1200 |
| Answer» D. 1200 | |
| 84. |
The centrifugal pump has a ______ flow. |
| A. | Variable |
| B. | Uniform |
| C. | Continuous |
| D. | Constant |
| Answer» D. Constant | |
| 85. |
The maximum efficiency of a centrifugal pump is _____________ |
| A. | 50% |
| B. | 60% |
| C. | 85% |
| D. | 100% |
| Answer» D. 100% | |
| 86. |
The impeller in the volute pump is surrounded by _____________ |
| A. | Discharge pipe |
| B. | Throat |
| C. | Suction pipe |
| D. | Volute chamber |
| Answer» E. | |
| 87. |
Which one of the following is correct? |
| A. | C = Maximum efficiency |
| B. | D = Minimum efficiency |
| C. | C = Rated discharge |
| D. | D = Shutoff head |
| Answer» B. D = Minimum efficiency | |
| 88. |
In the following figure ‘B’ is represented by _______ |
| A. | Total static head |
| B. | Total dynamic head |
| C. | Shut off head |
| D. | Minimum head |
| Answer» E. | |
| 89. |
Which one of the following represents ‘A’? |
| A. | Total static head |
| B. | Total dynamic head |
| C. | Shut off head |
| D. | Minimum head |
| Answer» D. Minimum head | |
| 90. |
The rated discharge is represented by ____________ |
| A. | C |
| B. | D |
| C. | E |
| D. | F |
| Answer» C. E | |
| 91. |
Which of the following is the correct classification of pumps? |
| A. | Physical principle of operation |
| B. | Mechanical principle of operation |
| C. | Chemical principle of operation |
| D. | Biological principle of operation |
| Answer» C. Chemical principle of operation | |
| 92. |
Based on the type of casing, the centrifugal pump is divided into _____ types. |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 93. |
The plot of total dynamic head and discharge of a pump is called |
| A. | Dynamic head curve |
| B. | System head curve |
| C. | Pump curve |
| D. | Discharge curve |
| Answer» C. Pump curve | |
| 94. |
The specific speed of a pump is given by |
| A. | NQ1/2 / H 2 |
| B. | NQ1/2 / H 3/4 |
| C. | NQ/ H3/4 |
| D. | NQ 1/2 / H1/4 |
| Answer» C. NQ/ H3/4 | |
| 95. |
The unit of specific speed is |
| A. | Metre/second |
| B. | Metre/second2 |
| C. | Centimetre/second |
| D. | Dimensionless |
| Answer» E. | |
| 96. |
In figure 1, 'B' is represented by _______ |
| A. | Total static head |
| B. | Total dynamic head |
| C. | Shut off head |
| D. | Minimum head |
| Answer» E. | |
| 97. |
The maximum efficiency of a centrifugal pump is |
| A. | 0.5 |
| B. | 0.6 |
| C. | 0.85 |
| D. | 1 |
| Answer» D. 1 | |
| 98. |
Consider the following statements regarding vortex chamber.1. Reduce the velocity of the pump2.Convert pressure energy into kinetic energy3. Decrease the efficiency of the pumpWhich of the above statement is correct? |
| A. | Only 1 |
| B. | Only 2 |
| C. | Only 3 |
| D. | 1, 2, 3 |
| Answer» B. Only 2 | |
| 99. |
When the specific speed of the pump is <2600, the type of pump is |
| A. | Reciprocating pump |
| B. | Centrifugal pump |
| C. | Mixed flow pump |
| D. | Axial flow pump |
| Answer» C. Mixed flow pump | |
| 100. |
Consider the following statement regarding Reciprocating pump.1. High initial cost2. Requires a small space3. Less power requiredWhich of the following is/are incorrect statement? |
| A. | Only 1 |
| B. | Only 2 |
| C. | Only 3 |
| D. | 2, 3 |
| Answer» E. | |