MCQOPTIONS
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MCQOPTIONS
This section includes 5314 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1451. |
If the cohesive backfill carries a surcharge of q per unit area, then the lateral pressure is increased by _________ |
| A. | Ka q |
| B. | q |
| C. | Ka |
| D. | Ka/q |
| Answer» B. q | |
| 1452. |
When the top tension portion of the wall in cohesive soil is neglected, the total lateral thrust is given by __________ |
| A. | Pa=\(\frac{1}{2}\)Ka γH2 cot2 α-2c cotα |
| B. | Pa=\(\frac{1}{2}\)Ka γH2 cot2 α-2c cotα+\(\frac{2c^2}{γ}\) |
| C. | Pa=\(\frac{1}{2}\)Ka γH2 cot2 α-2c cotα-\(\frac{2c^2}{γ}\) |
| D. | Pa=Ka H2-2c cotα |
| Answer» C. Pa=\(\frac{1}{2}\)Ka γH2 cot2 α-2c cotα-\(\frac{2c^2}{γ}\) | |
| 1453. |
For an inclined back and surcharge, if P1, is horizontal pressure and W is weight of soil wedge, then the total pressure is given by __________ |
| A. | P=P1+W |
| B. | \(P=\sqrt{P_1^2+W^2}\) |
| C. | P=(P1+W)2 |
| D. | P=P1-W |
| Answer» C. P=(P1+W)2 | |
| 1454. |
The critical height for an unsupported vertical cut in cohesive soil is given by _____________ |
| A. | \(H_c=\frac{q-2c cotα}{γ} \) |
| B. | \(H_c=\frac{4c tanα}{γ} \) |
| C. | \(H_c=\frac{4 cotα}{γ} \) |
| D. | \(H_c=\frac{cotα}{γ} \) |
| Answer» C. \(H_c=\frac{4 cotα}{γ} \) | |
| 1455. |
If a tension crack is developed at the top of wall to a depth Zo in cohesive soils, then the total net pressure is zero for a depth of _________ |
| A. | 2Zo |
| B. | 3Zo |
| C. | 4Zo |
| D. | 5Zo |
| Answer» B. 3Zo | |
| 1456. |
The total net pressure for a cohesive soil is given by ________ |
| A. | Pa=\(\frac{1}{2}\) Ka γH2 cot2 α-2c cotα |
| B. | Pa=γH2-2c cotα |
| C. | Pa=Ka γH2-2c cotα |
| D. | Pa=Ka H2-2c cotα |
| Answer» B. Pa=γH2-2c cotα | |
| 1457. |
For a cohesive soil, the pressure intensity is reduced by a factor of __________ |
| A. | 2c cotα |
| B. | 2c tanα |
| C. | 2c sinα |
| D. | 2c cosα |
| Answer» B. 2c tanα | |
| 1458. |
The effect of cohesion in the soil is to __________ |
| A. | reduce pressure intensity |
| B. | increase pressure intensity by 3 |
| C. | double the pressure intensity |
| D. | increase pressure intensity by 4 |
| Answer» B. increase pressure intensity by 3 | |
| 1459. |
The depth at which the tension is zero for cohesive soils with retaining wall in terms Ka is _____ |
| A. | \(z_0=\frac{2cK_a}{γ} \) |
| B. | \(z_0=\frac{2c}{γ} \frac{1}{√K_a } \) |
| C. | \(z_0=\frac{2cK_a}{γ} \) |
| D. | \(z_0=\frac{2c}{γ}(\frac{1}{K_a}) \) |
| Answer» C. \(z_0=\frac{2cK_a}{γ} \) | |
| 1460. |
The tension at the top level of retaining wall reduces to zero at a depth ___________ |
| A. | \(z_0=\frac{q-2c cotα}{γ} \) |
| B. | \(z_0=\frac{2c tanα}{γ} \) |
| C. | \(z_0=\frac{2 cotα}{γ} \) |
| D. | \(z_0=\frac{cotα}{γ} \) |
| Answer» C. \(z_0=\frac{2 cotα}{γ} \) | |
| 1461. |
The Belli equation at the ground surface is given by _________ |
| A. | pa=γzcot2 α-2c cotα |
| B. | pa=γzcot2 α+2c cotα |
| C. | pa=-2c cotα |
| D. | pa=γzcot2 α/2c cotα |
| Answer» D. pa=γzcot2 α/2c cotα | |
| 1462. |
The Belli equation of lateral pressure of cohesive soil is ____________ |
| A. | pa=γzcot2 α-2c cotα |
| B. | pa=γzcot2 α+2c cotα |
| C. | pa=-2c cotα |
| D. | pa=γzcot2 α/2c cotα |
| Answer» B. pa=γzcot2 α+2c cotα | |
| 1463. |
The principal stress relationship on a failure plane is given by _______ |
| A. | σ1=σ3 tan2 α |
| B. | σ1=2c tanα-σ3 tan2 α |
| C. | σ1=2c tanα+σ3 |
| D. | σ1=2c tanα+σ3 tan2 α |
| Answer» E. | |
| 1464. |
Similarity between Hopkinonson’s and field’s test is that _______ |
| A. | both need similar mechanically coupled motor |
| B. | both need similar electrically coupled motor |
| C. | regenerative power |
| D. | negligible power |
| Answer» B. both need similar electrically coupled motor | |
| 1465. |
Swineburne’s test is applicable to those machines in which flux is practically _______ |
| A. | constant |
| B. | linear |
| C. | non-linear |
| D. | none of the mentioned |
| Answer» B. linear | |
| 1466. |
The possible assumption is/are made while doing swineburne’s test. |
| A. | (i) and (ii) |
| B. | (iii) and (i) |
| C. | (i), (ii), and (iii) |
| D. | (i)View Answer |
| Answer» B. (iii) and (i) | |
| 1467. |
The efficiency in the swineburne’s test can be found. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1468. |
Which is the most appropriate relation to find efficiency of the generator? |
| A. | output/(output + losses) |
| B. | (output – losses)/input |
| C. | (output – losses)/(output + losses) |
| D. | any of the mentioned |
| Answer» B. (output – losses)/input | |
| 1469. |
Hopkinson’s test is also called regenerative test due to ____________ |
| A. | energy of one machine is used to drive other |
| B. | feedback |
| C. | losses are least |
| D. | extra motor is used |
| Answer» B. feedback | |
| 1470. |
In the Hopkinson’s test on two DC machines. Machine A has field current of 1.4A and B has field current of 1.3A. Which machine acts as generator? |
| A. | B |
| B. | A |
| C. | A,B |
| D. | None of the mentioned |
| Answer» C. A,B | |
| 1471. |
In the hopkinson’s test on two DC machines. Machine A has field current of 1.4A and B has field current of 1.3A. Which machine acts as motor? |
| A. | B |
| B. | A |
| C. | A, B |
| D. | None of the mentioned |
| Answer» B. A | |
| 1472. |
If the field current and armature current are reversed, then the __________ |
| A. | direction of rotation remains same |
| B. | direction of rotation reverses |
| C. | stops |
| D. | none of the mentioned |
| Answer» B. direction of rotation reverses | |
| 1473. |
______ test is used for determining the efficiency of a traction motor. |
| A. | Field |
| B. | Retardation |
| C. | Hopkinson |
| D. | Swineburne’s |
| Answer» B. Retardation | |
| 1474. |
The quantities needed to complete retardation test are/is _________ |
| A. | dw/dt and moment of inertia |
| B. | dw/dt |
| C. | current |
| D. | any of the mentioned |
| Answer» B. dw/dt | |
| 1475. |
What is the main concern before doing hopkinson’s test for finding efficiency? |
| A. | needs one motor and one generator is that it |
| B. | ignores iron and stray losses |
| C. | needs one motor |
| D. | requires identical shunt machines |
| Answer» E. | |
| 1476. |
A dc motor is connected in the short-shunt configuration, but the series and the shunt windings get interchanged by mistake and the motor is connected to the rated voltage? |
| A. | neither of the windings get short-circuit |
| B. | series winding gets overloaded |
| C. | shunt winding gets overloaded |
| D. | both of the winding get overloaded |
| Answer» B. series winding gets overloaded | |
| 1477. |
The particles which passes through a particular mesh size is called as ____ |
| A. | Oversized |
| B. | Undersized |
| C. | Exact |
| D. | By-pass |
| Answer» C. Exact | |
| 1478. |
All wet classifiers depend upon the difference in settling velocity of particles. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1479. |
Which of the following is a standard screen? |
| A. | Treybal screen |
| B. | Tyler screen |
| C. | McCabe screen |
| D. | Camp screen |
| Answer» C. McCabe screen | |
| 1480. |
Before you use modify commands, you need to make a selection of _________ |
| A. | only one object |
| B. | one or more objects |
| C. | minimum two objects |
| D. | maximum two objects |
| Answer» C. minimum two objects | |
| 1481. |
The command to remove rows from a table ‘CUSTOMER’ is __________________ |
| A. | DROP FROM CUSTOMER |
| B. | UPDATE FROM CUSTOMER |
| C. | REMOVE FROM CUSTOMER |
| D. | DELETE FROM CUSTOMER WHERE |
| Answer» E. | |
| 1482. |
Find all the cities with temperature, condition and humidity whose humidity is in the range of 63 to 79. |
| A. | SELECT * FROM weather WHERE humidity IN (63 to 79) |
| B. | SELECT * FROM weather WHERE humidity NOT IN (63 AND 79) |
| C. | SELECT * FROM weather WHERE humidity BETWEEN 63 AND 79 |
| D. | SELECT * FROM weather WHERE humidity NOT BETWEEN 63 AND 79 |
| Answer» D. SELECT * FROM weather WHERE humidity NOT BETWEEN 63 AND 79 | |
| 1483. |
Find all the tuples having a temperature greater than ‘Paris’. |
| A. | SELECT * FROM weather WHERE temperature > (SELECT temperature FROM weather WHERE city = ‘Paris’ |
| B. | SELECT * FROM weather WHERE temperature > (SELECT * FROM weather WHERE city = ‘Paris’) |
| C. | SELECT * FROM weather WHERE temperature > (SELECT city FROM weather WHERE city = ‘Paris’) |
| D. | SELECT * FROM weather WHERE temperature > ‘Paris’ temperature |
| Answer» B. SELECT * FROM weather WHERE temperature > (SELECT * FROM weather WHERE city = ‘Paris’) | |
| 1484. |
What is the meaning of LIKE ‘%0%0%’? |
| A. | Feature begins with two 0’s |
| B. | Feature ends with two 0’s |
| C. | Feature has more than two 0’s |
| D. | Feature has two 0’s in it, at any position |
| Answer» E. | |
| 1485. |
SQL query to find all the cities whose humidity is 95. |
| A. | SELECT city WHERE humidity = 95 |
| B. | SELECT city FROM weather WHERE humidity = 95 |
| C. | SELECT humidity = 89 FROM weather |
| D. | SELECT city FROM weather |
| Answer» C. SELECT humidity = 89 FROM weather | |
| 1486. |
Which TCL command undo all the updates performed by the SQL in the transaction? |
| A. | ROLLBACK |
| B. | COMMIT |
| C. | TRUNCATE |
| D. | DELETE |
| Answer» C. TRUNCATE | |
| 1487. |
Which of the following command makes the updates performed by the transaction permanent in the database? |
| A. | ROLLBACK |
| B. | COMMIT |
| C. | TRUNCATE |
| D. | DELETE |
| Answer» C. TRUNCATE | |
| 1488. |
Suppose the transmission line is loaded with its surge impedance, the receiving-end voltage is greater than sending end voltage. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1489. |
A single phase 50 hz, generator supplies an inductive load of 5 MW at a power factor of 0.8 lagging using OHTL over 20 km. The resistance and reactance are 0.39Ω and 3.96 Ω. The voltage at receiving station is maintained at 10 KV. The sending end voltage is 11.68 kV. If the voltage regulation is reduced to 50%, then the receiving end current at this operation mode will be _____________ |
| A. | 526 A |
| B. | 549 A |
| C. | 521 A |
| D. | 580 A |
| Answer» B. 549 A | |
| 1490. |
A single phase 50 hz, generator supplies an inductive load of 5 MW at a power factor of 0.8 lagging using OHTL over 20 km. The resistance and reactance are 0.39Ω and 3.96 Ω. The voltage at receiving station is maintained at 10 KV. The sending end voltage is 11.68 kV. If the voltage regulation is reduced to 50%, then the power factor angle at this operation mode will be ________ |
| A. | 18.04°, lagging |
| B. | 18.04°, leading |
| C. | 21.06°, leading |
| D. | 21.06°, lagging |
| Answer» B. 18.04°, leading | |
| 1491. |
A single phase 50 hz, generator supplies an inductive load of 5 MW at a power factor of 0.8 lagging using OHTL over 20 km. The resistance and reactance are 0.39Ω and 3.96 Ω. The voltage at receiving station is maintained at 10 KV. The sending end voltage is 11.68 kV. If the voltage regulation is reduced to 50%, then the power factor at this operation mode will be ____________ |
| A. | 0.95, lagging |
| B. | 0.92, leading |
| C. | 0.95, lagging |
| D. | 0.90, leading |
| Answer» B. 0.92, leading | |
| 1492. |
A single phase 50 hz, generator supplies an inductive load of 5 MW at a power factor of 0.8 lagging using OHTL over 20 km. The resistance and reactance are 0.39Ω and 3.96 Ω. The voltage at receiving station is maintained at 10 KV. The sending end voltage is 11.68 kV. If the voltage regulation is reduced to 50%, then the power factor angle at this operation mode will be _____________ |
| A. | 18.04° |
| B. | 8.04° |
| C. | 21.06° |
| D. | 12° |
| Answer» B. 8.04° | |
| 1493. |
A single phase 50 hz, generator supplies an inductive load of 5 MW at a power factor of 0.8 lagging using OHTL over 20 km. The resistance and reactance are 0.39Ω and 3.96 Ω. The voltage at receiving station is maintained at 10 KV. The sending end voltage is 11.68 kV. If the voltage regulation is reduced to 50%, then the power factor at this operation mode will be _________________ |
| A. | 0.95 |
| B. | 0.92 |
| C. | 0.74 |
| D. | 0.90 |
| Answer» B. 0.92 | |
| 1494. |
A single phase 50 hz, generator supplies an inductive load of 5 MW at a power factor of 0.8 lagging using OHTL over 20 km. The resistance and reactance are 0.39Ω and 3.96 Ω. The voltage at receiving station is maintained at 10 KV. The sending end voltage is 11.68 kV. The new sending end voltage at the half the voltage regulation is _____________ |
| A. | 10.84 kV |
| B. | 11.84 kV |
| C. | 8.84 kV |
| D. | 16.2 kV |
| Answer» B. 11.84 kV | |
| 1495. |
A single phase 50 hz, generator supplies an inductive load of 5 MW at a power factor of 0.8 lagging using OHTL over 20 km. The resistance and reactance are 0.39Ω and 3.96 Ω. The voltage at receiving station is maintained at 10 KV. The sending end voltage is 11.68 kV. The half the voltage regulation will be _____________ |
| A. | 8.4 % |
| B. | 16.8 % |
| C. | 14.2% |
| D. | 10.5% |
| Answer» B. 16.8 % | |
| 1496. |
A single phase 50 hz, generator supplies an inductive load of 5 MW at a power factor of 0.8 lagging using OHTL over 20 km. The resistance and reactance are 0.39Ω and 3.96 Ω. The voltage at receiving station is maintained at 10 KV. Identify the transmission line and the voltage regulation. |
| A. | STL, 11.68% |
| B. | MTL, 11.68 |
| C. | STL, 21.5% |
| D. | MTL, 14.2% |
| Answer» B. MTL, 11.68 | |
| 1497. |
A single phase 50 hz, generator supplies an inductive load of 5 MW at a power factor of 0.8 lagging using OHTL over 20 km. The resistance and reactance are 0.39Ω and 3.96 Ω. The voltage at receiving station is maintained at 10 KV. The sending end voltage is 11.68 kV. The voltage regulation will be _______ |
| A. | 16.8 % |
| B. | 18.8% |
| C. | 21.75% |
| D. | 12.8% |
| Answer» B. 18.8% | |
| 1498. |
What does MEI stand for? |
| A. | modified embedded invalid |
| B. | modified embedded input |
| C. | modified exclusive invalid |
| D. | modified exclusive input |
| Answer» D. modified exclusive input | |
| 1499. |
What does MESI stand for? |
| A. | modified exclusive stale invalid |
| B. | modified exclusive shared invalid |
| C. | modified exclusive system input |
| D. | modifies embedded shared invalid |
| Answer» C. modified exclusive system input | |
| 1500. |
Which of the following is also known as Illinois protocol? |
| A. | MESI protocol |
| B. | MEI protocol |
| C. | Bus snooping |
| D. | Modified exclusive invalid |
| Answer» B. MEI protocol | |