MCQOPTIONS
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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.
| 701. |
The direction of first null of the broadside array of N-Isotropic sources is _____ |
| A. | \(cos^{-1}([±\frac{λ}{Nd}])\) |
| B. | \(cos^{-1}([±\frac{πλ}{Nd}])\) |
| C. | \(cos^{-1}([±\frac{2πλ}{Nd}])\) |
| D. | \(cos^{-1}([±\frac{λ}{2Nd}])\) |
| Answer» B. \(cos^{-1}([±\frac{πλ}{Nd}])\) | |
| 702. |
The direction of nulls for broadside array of N –Isotropic sources is given by _____ |
| A. | \(cos^{-1}([±\frac{nλ}{Nd}])\) |
| B. | \(cos^{-1}([±\frac{2nλ}{Nd}])\) |
| C. | \(cos^{-1}([±\frac{2πnλ}{2Nd}])\) |
| D. | \(cos^{-1}([±\frac{nλ}{Nd}])\) |
| Answer» B. \(cos^{-1}([±\frac{2nλ}{Nd}])\) | |
| 703. |
When does capacitor is included in equivalent circuit of transformer? |
| A. | Transformer of very high VA rating |
| B. | Transformer with very high frequency operation |
| C. | Transformer with less VA |
| D. | Never |
| Answer» C. Transformer with less VA | |
| 704. |
Parallel parameters in a transformer equivalent circuit contains ___________ |
| A. | Gi and Bm |
| B. | R1 and X1 |
| C. | R2 and X2 |
| D. | Cannot be determined |
| Answer» B. R1 and X1 | |
| 705. |
To convert an ideal transformer into a practical transformer we add ____________ |
| A. | Primary winding resistance and secondary winding resistance |
| B. | Primary winding leakage reactance and secondary winding leakage reactance |
| C. | Primary winding resistance, leakage and secondary winding leakage reactance |
| D. | Cannot be determined |
| Answer» D. Cannot be determined | |
| 706. |
Both resistances and leakage reactances of the transformer windings are __________ |
| A. | Series effects |
| B. | Parallel effects |
| C. | Series-parallel effects |
| D. | Cannot say |
| Answer» B. Parallel effects | |
| 707. |
When does transformer breath in? |
| A. | load on it increases |
| B. | load on it decreases |
| C. | load remains constant |
| D. | cannot be determined |
| Answer» C. load remains constant | |
| 708. |
The purpose of communication system is to transfer information from _______ to the destination. |
| A. | user |
| B. | source |
| C. | system |
| D. | station |
| Answer» C. system | |
| 709. |
A modulation technique that improves channel bandwidth utilization. |
| A. | direct |
| B. | modulation |
| C. | demodulation |
| D. | multiplexing |
| Answer» E. | |
| 710. |
A transmission mode that can transmit data in both the directions but transmits in only one direction at a time. |
| A. | simplex |
| B. | half duplex |
| C. | full duplex |
| D. | semi-duplex |
| Answer» C. full duplex | |
| 711. |
A coaxial cable has a bandwidth of _________ of megahertz. |
| A. | 100 |
| B. | 150 |
| C. | 1000 |
| D. | 10000 |
| Answer» B. 150 | |
| 712. |
In high electron mobility transistor, the electrons are |
| A. | far apart |
| B. | high mobility |
| C. | near by and low mobility |
| D. | far apart and high mobility |
| Answer» C. near by and low mobility | |
| 713. |
Equal number of p and n devices in a device will consume |
| A. | small area |
| B. | large area |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» C. all of the mentioned | |
| 714. |
In a CE-JFET, the ratio of electron mobility to hole mobility is equal to |
| A. | 4 |
| B. | 10 |
| C. | 5 |
| D. | 20 |
| Answer» C. 5 | |
| 715. |
E-JFET technology has |
| A. | low voltage swing |
| B. | high current swing |
| C. | high power requirements |
| D. | high voltage swing |
| Answer» E. | |
| 716. |
To activate a dopant, _______ is necessary. |
| A. | low temperature stable gate |
| B. | low temperature stable drain |
| C. | high temperature stable gate |
| D. | high temperature stable drain |
| Answer» D. high temperature stable drain | |
| 717. |
For the formation of E-MESFET _______ is used. |
| A. | n- implantation |
| B. | n+ implantation |
| C. | p- implantation |
| D. | p+ implantation |
| Answer» B. n+ implantation | |
| 718. |
Which has a lightly doped channel? |
| A. | E-MOSFET |
| B. | D-MOSFET |
| C. | E-JFET |
| D. | CE-JFET |
| Answer» B. D-MOSFET | |
| 719. |
The time required to convert to a fraction of 0.7 for a first order reaction is ____ |
| A. | t0.7 = \(\frac{(0.7)}{C_{A0} k}\) |
| B. | t0.7 = \(\frac{(-0.7)}{C_{A0} k}\) |
| C. | t0.7 = \(\frac{(0.3)}{C_{A0} k}\) |
| D. | t0.7 = \(\frac{(-0.3)}{C_{A0} k}\) |
| Answer» E. | |
| 720. |
The fractional conversion is expressed as____ |
| A. | \(\frac{C_A}{C_{A0}} \) |
| B. | \(\frac{C_{A0}}{C_A} \) |
| C. | \(\frac{1}{C_{A0}} \) |
| D. | \(\frac{C_A}{kC_{A0}} \) |
| Answer» B. \(\frac{C_{A0}}{C_A} \) | |
| 721. |
If t0.5 = 100 minutes and initial concentration is 10, then the order of the reaction is ____ |
| A. | 4 |
| B. | -1 |
| C. | -2 |
| D. | 1 |
| Answer» C. -2 | |
| 722. |
What is the slope of the plot of ln (t0.5) and ln (CAo)? (Where n is the reaction order) |
| A. | 1-n |
| B. | 2-n |
| C. | n |
| D. | \(\frac{n}{2} \) |
| Answer» B. 2-n | |
| 723. |
For a zero order reaction, the slope of t0.5 and CAo is ____ |
| A. | 2 |
| B. | 3 |
| C. | 1 |
| D. | 0 |
| Answer» D. 0 | |
| 724. |
The relationship between t.0.5 and CAo for a zero order reaction is ____ |
| A. | t0.5 = \(\frac{1}{kC_{A0}} \) |
| B. | t0.5 = \(\frac{1}{C_{A0}} \) |
| C. | t0.5 = \(\frac{C_{A0}}{k}\) |
| D. | t0.5 = \(\frac{C_{A0}}{2k}\) |
| Answer» E. | |
| 725. |
For all orders of reaction except the first order, half life is related to initial concentration as ____ |
| A. | t0.5 α CAon |
| B. | t0.5 α CAo1-n |
| C. | t0.5 α CAo2n |
| D. | t0.5 α CAo |
| Answer» C. t0.5 α CAo2n | |
| 726. |
In terms of conversion, half life is the time taken for ____ |
| A. | 50% conversion |
| B. | 75% conversion |
| C. | 20% conversion |
| D. | 30% conversion |
| Answer» B. 75% conversion | |
| 727. |
State true or false.For a second order reaction, t.0.5 is directly proportional to the initial concentration. |
| A. | True |
| B. | False |
| Answer» C. | |
| 728. |
Which lake in Northeast India has the world’s only floating National Park? |
| A. | Dal Lake |
| B. | Loktak Lake |
| C. | Lake Tsomgo |
| D. | Shilloi Lake |
| Answer» C. Lake Tsomgo | |
| 729. |
Which of the following is a step taken by the government to protect the wildlife? |
| A. | Control the population of animals in forest |
| B. | Proper food facilities to the animals in forest |
| C. | Deforestation to provide space for urbanization |
| D. | Various Project to protect animals in forest |
| Answer» E. | |
| 730. |
What is called for a scheme to protect and conserve bio-diversity? |
| A. | Biosphere |
| B. | Bio-reserve |
| C. | Biotechnology |
| D. | Bio-ecology |
| Answer» C. Biotechnology | |
| 731. |
Which is the natural habitat of Indian lion? |
| A. | Western Ghats |
| B. | Sunderban delta |
| C. | Gir forest |
| D. | Himalayas |
| Answer» D. Himalayas | |
| 732. |
When did World Wild Fund for Nature-India (WWF-India) established? |
| A. | established?a) 1956 |
| B. | 1969 |
| C. | 1976 |
| D. | 1997 |
| Answer» C. 1976 | |
| 733. |
What will be the value of rotation at point D? |
| A. | 137.1/EI |
| B. | -137.1/EI |
| C. | 0 |
| D. | 100/EI |
| Answer» D. 100/EI | |
| 734. |
What will be the value of rotation at point A? |
| A. | 137.1/EI |
| B. | -137.1/EI |
| C. | 0 |
| D. | 100/EI |
| Answer» D. 100/EI | |
| 735. |
What will be the value of FEMCB? |
| A. | 66.7 |
| B. | -66.7 |
| C. | -160 |
| D. | 160 |
| Answer» B. -66.7 | |
| 736. |
What will be the value of FEMBC? |
| A. | 66.7 |
| B. | -66.7 |
| C. | -160 |
| D. | 160 |
| Answer» C. -160 | |
| 737. |
If value of EI in right frame member was twice that of the left one then this frame will be a sway one.State whether this statement is true or false. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 738. |
This beam is a sway frame.State whether this statement is true or false. |
| A. | true |
| B. | false |
| Answer» C. | |
| 739. |
What will be the horizontal force at point A? |
| A. | M/4L |
| B. | -3M/4L |
| C. | 3M/4L |
| D. | M/2L |
| Answer» C. 3M/4L | |
| 740. |
What will be the horizontal force at point C? |
| A. | M/4L |
| B. | -3M/4L |
| C. | 3M/4L |
| D. | M/2L |
| Answer» D. M/2L | |
| 741. |
What will be the vertical force at point C? |
| A. | M/4L |
| B. | 4M/L |
| C. | 3M/4L |
| D. | M/2L |
| Answer» D. M/2L | |
| 742. |
What will be the value of Mcb? |
| A. | M/4 |
| B. | –M/4 |
| C. | M/2 |
| D. | –M/2 |
| Answer» B. –M/4 | |
| 743. |
What will be the value of Mab? |
| A. | M/4 |
| B. | –M/4 |
| C. | M/2 |
| D. | –M/2 |
| Answer» B. –M/4 | |
| 744. |
What will be the value of Mbc? |
| A. | M/4 |
| B. | –M/4 |
| C. | M/2 |
| D. | –M/2 |
| Answer» D. –M/2 | |
| 745. |
Which of the following is not a non-essential mineral? |
| A. | Molybdenum |
| B. | Iron |
| C. | Calcium |
| D. | Cobalt |
| Answer» D. Cobalt | |
| 746. |
Which of the following reactor is best for the production of vinegar? |
| A. | Batch reactors |
| B. | Fed-Batch reactors |
| C. | Continuous reactors |
| D. | Submerged reactors |
| Answer» C. Continuous reactors | |
| 747. |
Which of the following is the first step in Fermentation Technology? |
| A. | Media Formulation |
| B. | Isolation of microbes |
| C. | Constructing of fermenter |
| D. | Preservation of microbes |
| Answer» B. Isolation of microbes | |
| 748. |
Which of the following is not the product of fermented fruit? |
| A. | Wine |
| B. | Whisky |
| C. | Vinegar |
| D. | Beer |
| Answer» D. Beer | |
| 749. |
Iron, Zinc, Copper influence the production of ____________ |
| A. | Protease |
| B. | Neomycin |
| C. | Citric acid |
| D. | Penicillin |
| Answer» E. | |
| 750. |
Which of the following growth factor is used in vinegar production? |
| A. | Calcium Carbonate |
| B. | Calcium Phosphate |
| C. | Calcium Pantothenate |
| D. | Calcium Hydroxide |
| Answer» D. Calcium Hydroxide | |