MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 2114 Mcqs, each offering curated multiple-choice questions to sharpen your Unit Processes knowledge and support exam preparation. Choose a topic below to get started.
| 601. |
_____ offers fade resistance for slow-moving mobiles. |
| A. | FEC |
| B. | Diversity |
| C. | Frequency hopping |
| D. | Interleaving |
| Answer» D. Interleaving | |
| 602. |
Cellular systems employ ____ sectorization. |
| A. | two way |
| B. | four way |
| C. | eight way |
| D. | three way |
| Answer» E. | |
| 603. |
The rule of thumb for antenna diversity states that for an antenna separation of 10 wavelengths or more, there is a considerable probability for the diversity signal to be substantially decorrelated from the primary signal. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 604. |
Doppler spread is given by _______ |
| A. | carrier frequency times the ratio of maximum velocity of a transmitter divided by propagation velocity |
| B. | carrier frequency times the ratio of minimum velocity of a transmitter divided by propagation velocity |
| C. | carrier frequency times the ratio of propagation velocity divided by maximum velocity of a transmitter |
| D. | carrier frequency times the ratio of propagation velocity divided by minimum velocity of a transmitter |
| Answer» B. carrier frequency times the ratio of minimum velocity of a transmitter divided by propagation velocity | |
| 605. |
Which of the following can reduce the probability of non-recoverable fade depth? |
| A. | Diversity |
| B. | FEC |
| C. | Interleaving |
| D. | FEC and Interleaving |
| Answer» B. FEC | |
| 606. |
Which of the following option cannot be employed to overcome fading? |
| A. | Reduced channel symbol rates |
| B. | Diversity transmission and reception |
| C. | Decreased bandwidth |
| D. | Structured data |
| Answer» D. Structured data | |
| 607. |
In a paraboloid antenna, all rays leaving the focal point are collimated along the reflector’s axis after reflection. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 608. |
Which of the following is used to produce wide beam in one plane and narrow beam in other plane? |
| A. | Pill box |
| B. | Truncated paraboloid |
| C. | Cassegrain |
| D. | Paraboloid with rectangular aperture |
| Answer» B. Truncated paraboloid | |
| 609. |
Which of the following paraboloid reflector is formed by cutting some part of paraboloid to meet requirements? |
| A. | Truncated paraboloid |
| B. | Cassegrain |
| C. | Corner |
| D. | Pill box |
| Answer» B. Cassegrain | |
| 610. |
Which of the following is false regarding a paraboloid antenna? |
| A. | Spill over decreases due to back lobe of primary radiator |
| B. | Feed placed at the focus is used to improve the beam pattern |
| C. | Pill box provides wide beam in one plane and narrow beam in other plane |
| D. | At lower frequencies parabolic antennas are not used frequently |
| Answer» B. Feed placed at the focus is used to improve the beam pattern | |
| 611. |
What is the ratio of focal length to diameter for practical applications in a parabolic reflector? |
| A. | 0.25 to 0.5 |
| B. | < 0.25 |
| C. | 0.125 to 0.3 |
| D. | 0.5 to 1 |
| Answer» B. < 0.25 | |
| 612. |
Find the BWFN of a paraboloid with a circular aperture of diameter 10λ? |
| A. | 14 degrees |
| B. | 28 degrees |
| C. | 11.5 degrees |
| D. | 41 degrees |
| Answer» B. 28 degrees | |
| 613. |
BWFN of a paraboloid antenna with circular aperture assuming feed is isotropic is ____ |
| A. | \(\frac{140λ}{d} \) |
| B. | \(\frac{115λ}{d} \) |
| C. | \(\frac{58λ}{d} \) |
| D. | \(\frac{40λ}{d} \) |
| Answer» B. \(\frac{115λ}{d} \) | |
| 614. |
Find the aperture ratio of the paraboloid with aperture diameter 1m at 1.5GHz frequency? |
| A. | 5 |
| B. | 0.2 |
| C. | 1.5 |
| D. | 7.5 |
| Answer» B. 0.2 | |
| 615. |
The power gain of the parabolic reflector with circular aperture of diameter 10λ? |
| A. | 100π |
| B. | 10π |
| C. | 600π |
| D. | 360π |
| Answer» D. 360π | |
| 616. |
Which of the following wave conversion mechanism is performed in a parabolic reflector antenna? |
| A. | Plane to spherical |
| B. | Spherical to plane |
| C. | Performs both plane to spherical and spherical to plane |
| D. | Elliptic polarization |
| Answer» C. Performs both plane to spherical and spherical to plane | |
| 617. |
What is the default range used by the fplot command? |
| A. | [-5,5] |
| B. | (-5,5) |
| C. | No default range |
| D. | No such command |
| Answer» B. (-5,5) | |
| 618. |
What is the period of square wave generated by the square() command? |
| A. | User-defined |
| B. | pi |
| C. | 2*pi |
| D. | pi/2 |
| Answer» D. pi/2 | |
| 619. |
Which command is suitable to change the axes of the graph plotted? |
| A. | axes |
| B. | axis |
| C. | yxaxes |
| D. | no command |
| Answer» C. yxaxes | |
| 620. |
The joint filling sand should have fines are __________ |
| A. | 75 microns |
| B. | 85 microns |
| C. | 95 microns |
| D. | 100 microns |
| Answer» E. | |
| 621. |
The least lane distribution factor value is least for __________ |
| A. | Single lane |
| B. | Double lane |
| C. | Three lanes |
| D. | Four lanes |
| Answer» C. Three lanes | |
| 622. |
The lane distribution factor on undivided roads with single lane carriage way is __________ |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» B. 1 | |
| 623. |
The depth of rutting criterion is obtained by __________ |
| A. | Micro strain |
| B. | Macro strain |
| C. | Traffic |
| D. | Elasticity modulus |
| Answer» C. Traffic | |
| 624. |
The VDF in hilly terrain for CVPD less than 1500 is? |
| A. | 1 |
| B. | 1.5 |
| C. | 2.0 |
| D. | 2.5 |
| Answer» B. 1.5 | |
| 625. |
The VDF of a lane if the CVPD is greater than 1500 in plain terrain is? |
| A. | 4.5 |
| B. | 2.5 |
| C. | 3.0 |
| D. | 4.0 |
| Answer» D. 4.0 | |
| 626. |
The average vehicles considered for pavement studies are __________ |
| A. | 150 |
| B. | 1500 |
| C. | 150 to 1500 |
| D. | 15000 |
| Answer» D. 15000 | |
| 627. |
What is the most commonly used overlay? |
| A. | Flexible over rigid |
| B. | Rigid over flexible |
| C. | Flexible over flexible |
| D. | Rigid over rigid |
| Answer» D. Rigid over rigid | |
| 628. |
The overlay design is laid for a maximum life span of __________ |
| A. | 5 years |
| B. | 7 years |
| C. | 9 years |
| D. | 10 years |
| Answer» E. | |
| 629. |
Axle load studies are carried out on a minimum sample of __________ |
| A. | 10% |
| B. | 15% |
| C. | 20% |
| D. | 25% |
| Answer» D. 25% | |
| 630. |
The heavy commercial vehicles are considered if their weight exceeds __________ |
| A. | 3.0 t |
| B. | 4.0 t |
| C. | 5.0 t |
| D. | 6.0 t |
| Answer» B. 4.0 t | |
| 631. |
What will be the torque required to drive a 0.1 litre/min pump at 2000 rpm of delta pressure across pump is 240 bars? |
| A. | 0.87 Nm |
| B. | 0.992 Nm |
| C. | 0.191 Nm |
| D. | 0.367 Nm |
| Answer» D. 0.367 Nm | |
| 632. |
A hydraulic circuit uses 25 litres of fluid per min. The fluid is supplied by a pump having a fixed displacement of 12.5 cm3 per revolution driven at 3000 rpm. The pump has a volumetric efficiency of 0.85 and torque efficiency of 0.88. If the system pressure is set at 18 MPa by the relief valve. What will be the power required to drive the pump? |
| A. | 13.48 KW |
| B. | 12.20 KW |
| C. | 11.09 KW |
| D. | 12.78 KW |
| Answer» E. | |
| 633. |
In an epicyclic gear train, an arm carries two wheels ‘A’ and ‘B’ having 24 teeth and 30 teeth respectively. If the arm rotates at 100 rpm in the clockwise direction about the centre of the wheel. ‘A’ which is fixed, then the speed of wheel on its own axis is _____ |
| A. | 20 rpm anticlockwise |
| B. | 25 rpm anticlockwise |
| C. | 180 rpm clockwise |
| D. | 225 rpm clockwise |
| Answer» D. 225 rpm clockwise | |
| 634. |
A simple band brake has the tight side of the band attached to a fixed pivot. The angle of wrap is 280° about a 450-mm diameter drum. A torque of 170 mm is sustained at 900 revs min-1. If the co-efficient of friction is 0.2 the required belt tension at tight side of the belt will be _____ |
| A. | 453.04N |
| B. | 549.12N |
| C. | 605.35N |
| D. | 1211.53N |
| Answer» E. | |
| 635. |
A flange mounted shear pin is used on a shaft as a safety device. The steel shear pin has a diameter of 2.38 mm and is to be mounted on the flange of shaft rotating at 650 rpm. The maximum power transmitted by the shaft is 4.5 KW. If the shear strength of material of pin is 30 MPa, the radial distance of its mounting is ____ |
| A. | 5.02 mm |
| B. | 11.98 mm |
| C. | 47.94 mm |
| D. | 301.20 mm |
| Answer» D. 301.20 mm | |
| 636. |
A straight tooth gear having involute profile with 20° pressure angle transmits 20Nm torque. Pitch diameter of the gear is 24 cm. If only one pair of tooth is engaged at any instant of time, the force experienced by the tooth will be ______ |
| A. | 78.30 N |
| B. | 88.70 N |
| C. | 156.60 N |
| D. | 177.36 N |
| Answer» E. | |
| 637. |
A motor car has a wheel base of 2.73 m and pivot centre of 1.065 m. the front and rear wheel track is 1.217 m. What will be angle of outside lock and turning circle radius of the outer front and inner rear wheels when the angle of inside lock is 40°? |
| A. | 34.6° |
| B. | 42° |
| C. | 32.4° |
| D. | 29° |
| Answer» D. 29° | |
| 638. |
What will be the interest per hour when the cost of 35hp tractor is ₨ 3,00,000/-, life of tractor is 10 years, rate of interest 10% and working hours per year is 1000 hours? |
| A. | Rs 16.50 |
| B. | Rs 17.34 |
| C. | Rs 15.30 |
| D. | Rs 14.28 |
| Answer» B. Rs 17.34 | |
| 639. |
All the diagonal elements of a skew-symmetric matrix is? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | Any integer |
| Answer» B. 1 | |
| 640. |
For matrix A, B if A – B = O, where O is a null matrix then? |
| A. | A = O |
| B. | B = O |
| C. | A = B |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 641. |
For matrix A, B.(A+B)T = AT + BT and (AB)T = ATBT if the orders of matrices are appropriate. |
| A. | True |
| B. | False |
| Answer» C. | |
| 642. |
If for a square matrix A, A2 = A then such a matrix is known as _________ |
| A. | Idempotent matrix |
| B. | Orthagonal matrix |
| C. | Null matrix |
| D. | None of the mentioned |
| Answer» B. Orthagonal matrix | |
| 643. |
The matrix multiplication is distrbutive over matrix addition. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 644. |
Let A=[aij ] be an mxn matrix and k be a scalar then kA is equal to __________ |
| A. | [kaij ]mxn |
| B. | [aij/k ]mxn |
| C. | [k2 aij]mxn |
| D. | None of the mentioned |
| Answer» B. [aij/k ]mxn | |
| 645. |
Let A order(axb) and Border(cxd) be two matrices, then if AB exists, the order of AB is? |
| A. | axd |
| B. | and Border(cxd) be two matrices, then if AB exists, the order of AB is?a) axdb) bxc |
| C. | axb |
| D. | be two matrices, then if AB exists, the order of AB is?a) axdb) bxcc) axbd) cxd |
| Answer» B. and Border(cxd) be two matrices, then if AB exists, the order of AB is?a) axdb) bxc | |
| 646. |
Let A order(axb) and Border(cxd) be two matrices, then for AB to exist, correct relation is given by? |
| A. | a = d |
| B. | and Border(cxd) be two matrices, then for AB to exist, correct relation is given by?a) a = db) b = c |
| C. | a = b |
| D. | be two matrices, then for AB to exist, correct relation is given by?a) a = db) b = cc) a = bd) c = d |
| Answer» C. a = b | |
| 647. |
Let A and B be two matrices of same order, then state whether the given statement is true or false. |
| A. | True |
| B. | FalseView Answer |
| Answer» B. FalseView Answer | |
| 648. |
A boundary of separation between two magnetic materials is identified by which factor? |
| A. | Change in the permeability |
| B. | Change in permittivity |
| C. | Change in magnetization |
| D. | Conduction |
| Answer» B. Change in permittivity | |
| 649. |
Find the magnetic moment of a material with magnetization 5 units in a volume of 35 units. |
| A. | 7 |
| B. | 1/7 |
| C. | 15 |
| D. | 175 |
| Answer» E. | |
| 650. |
Find the ratio of permeability of the two media when the wave is incident on the boundary at 45 degree and reflected by the boundary at 60 degree. |
| A. | 1:1 |
| B. | √3:1 |
| C. | 1:√3 |
| D. | 1:√2 |
| Answer» D. 1:√2 | |