Jelet Full Mocktest 1
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In a highly capacitive circuit the
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Apparent power is equal to the actual power
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Reactive power is more than the apparent power
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Reactive power is more than the actual power
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Actual power is more than its reactive power
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This full mock test for JELET covers key topics in electrical and electronics engineering, focusing on L-C circuits, power factors, and characteristics of electrical components.
(64).webp "Jelet Full Mocktest 1 - Quiz")
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- 2.
A thermistor is a type of
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Switch
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Resistor
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Battery
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Power supply
Correct Answer
A. ResistorExplanation
A thermistor is a type of resistor that is designed to change its resistance in response to changes in temperature. It is often used in temperature sensing applications, where its resistance can be measured to determine the temperature of the surrounding environment.Rate this question:
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- 3.
Which of the following is a vector quantity?
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Energy
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Mass
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Momentum
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Angle
Correct Answer
A. MomentumExplanation
Momentum is a vector quantity because it has both magnitude and direction. It is defined as the product of an object's mass and its velocity, and its direction is the same as the direction of the object's velocity. In contrast, energy, mass, and angle are scalar quantities, which only have magnitude and no direction.Rate this question:
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- 4.
The mechanical advantage of a lifting machine is the ratio of
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Distance moved by effort to the distance moved by load
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Load lifted to the effort applied
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Output to the input
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All of the above
Correct Answer
A. Load lifted to the effort appliedExplanation
The mechanical advantage of a lifting machine is determined by the ratio of the load lifted to the effort applied. This means that the mechanical advantage indicates how much easier it is to lift a load using the machine compared to lifting it directly by applying the effort alone. The larger the ratio, the greater the mechanical advantage and the easier it is to lift the load.Rate this question:
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- 5.
From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the centre of circular plate
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0.5 cm
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1.0 cm
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1.5 cm
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2.5 cm
Correct Answer
A. 0.5 cmExplanation
The radius of the circular plate is 3 cm (half of the diameter). The diameter of the circle cut out is also 3 cm (since it is a radius of the plate). The distance from the center of the plate to the edge of the cut out circle is the remaining radius of the plate, which is 3 cm - 2.5 cm = 0.5 cm. Therefore, the answer is 0.5 cm.Rate this question:
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- 6.
Which one do you like?
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h [(2a + b)/(a + b)]
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(h/2) [(2a + b)/(a + b)]
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(h/3) [(2a + b)/(a + b)]
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(h/3) [(a + b)/(2a + b)]
Correct Answer
A. (h/3) [(2a + b)/(a + b)]Explanation
The correct answer is (h/3) [(2a + b)/(a + b)].Rate this question:
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- 7.
A cube subjected to three mutually perpendicular stress of equal intensity p expenses a volumetric strain
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3p/ E × (2/m - 1)
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3p/ E × (2 - m)
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3p/ E × (1 - 2/m)
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E/ 3p × (2/m - 1)
Correct Answer
A. 3p/ E × (1 - 2/m)Explanation
Answer: Option C
Solution: Stress p in x-direction causes tensile strain p/E in x-direction, while the ‘p’ in ‘y’ and ‘z’ direction causes compressive strains µ(p/E) in x-direction.
Therefore, ex = p/E - µ(p/E) - µ(p/E) = p/E × (1- 2µ)
So, ey =p/E × (1- 2µ), ez = p/E × (1- 2µ)
Therefore, Volumetric Strain, ev = ex + ey + ez = 3p/E × (1- 2µ) = 3p/E × (1 – 2/m)Rate this question:
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- 8.
True stress strain-curve for materials is plotted between
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Load/original cross-sectional area and change in length/original length
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Load/ instantaneous cross-sectional area and loge (original area/ instantaneous area)
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Load/ instantaneous cross-sectional area and change in length/ original length
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Load/ instantaneous area and instantaneous area/original area
Correct Answer
A. Load/ instantaneous cross-sectional area and loge (original area/ instantaneous area)Explanation
The correct answer is Load/ instantaneous cross-sectional area and loge (original area/ instantaneous area) because the true stress-strain curve for materials is plotted using the load divided by the instantaneous cross-sectional area, which represents the true stress, and the natural logarithm of the ratio of the original area to the instantaneous area, which represents the true strain. This relationship accounts for the change in area as the material undergoes deformation and provides a more accurate representation of the material's behavior under stress.Rate this question:
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- 9.
The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder; This stress is called
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Longitudinal stress
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Hoop stress
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Yield stress
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Ultimate stress
Correct Answer
A. Hoop stressExplanation
The force acting along the circumference of the cylinder will cause stress in the walls in a direction normal to the longitudinal axis. This stress is known as hoop stress, which is the stress experienced by the walls of a cylindrical object due to the internal or external pressure. Hoop stress is important in determining the strength and stability of cylindrical structures such as pipes and pressure vessels.Rate this question:
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- 10.
The bending moment at the free end of a cantilever beam is
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Zero
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Minimum
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Maximum
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None of these
Correct Answer
A. ZeroExplanation
At the free end of a cantilever beam, there is no support or constraint, which means there are no external forces or moments acting on the beam. As a result, there is no bending moment at the free end of the beam. Therefore, the correct answer is zero.Rate this question:
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- 11.
The arranging of data in a logical sequence is called:
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sorting
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Classifying
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reproducing
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Summarizing
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Option 5
Correct Answer
A. sortingExplanation
The process of arranging data in a logical sequence is referred to as sorting. This involves organizing the data in a specific order, such as ascending or descending, based on certain criteria. Sorting allows for easier retrieval and analysis of the data, making it more manageable and understandable. Classifying refers to categorizing or grouping data based on similarities or characteristics. Reproducing refers to creating copies or duplicating data. Summarizing involves condensing or summarizing the data to provide a concise overview.Rate this question:
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- 12.
Time during which a job is processed by the computer is:
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Execution Time
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Delay Time
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Real Time
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Waiting Time
Correct Answer
A. Execution TimeExplanation
The time during which a job is processed by the computer is referred to as execution time. This is the duration in which the computer performs the necessary tasks and operations required by the job. It includes the time taken for the CPU to execute the instructions, access and retrieve data from memory, and perform any other computations needed. Execution time is an important factor in measuring the efficiency and performance of a computer system.Rate this question:
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- 13.
Which of the following circuit is used as a 'Memory device' in computers?
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Rectifier
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Flip Flop
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Comparator
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Attenuator
Correct Answer
A. Flip FlopExplanation
A flip flop is a type of circuit that is commonly used as a memory device in computers. It is designed to store and hold a single bit of information, which can be either a logic 0 or a logic 1. Flip flops are used in computer memory systems to store data temporarily or permanently, depending on the type of flip flop used. They are crucial for the storage and retrieval of data in computer systems, making them an essential component in memory devices.Rate this question:
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- 14.
Web browser uses
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TCP
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HTTP
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SMTP
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TELNET
Correct Answer
A. HTTPExplanation
HTTP (Hypertext Transfer Protocol) is a protocol used by web browsers to communicate with web servers. It is the foundation of data communication on the World Wide Web. HTTP allows the browser to request web pages and resources from servers, and receive responses containing the requested data. TCP (Transmission Control Protocol) is the underlying transport protocol that ensures reliable delivery of the HTTP messages. SMTP (Simple Mail Transfer Protocol) is used for sending emails, while TELNET is a protocol for remote terminal access. Although a web browser may use TCP, SMTP, and TELNET for other purposes, HTTP is the correct answer as it specifically refers to the protocol used for web browsing.Rate this question:
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- 15.
EEPROM stands for
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Electronically Erasable Programmable Read-Only Memory
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Electrically Erasable Programmable Read-Only Memory
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Electrically Enabled Programmable Read Only Memory
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None of these
Correct Answer
A. Electrically Erasable Programmable Read-Only MemoryExplanation
EEPROM stands for Electrically Erasable Programmable Read-Only Memory. This type of memory can be both programmed and erased electrically, allowing for easy modification of its contents. Unlike traditional ROM, which is read-only and cannot be changed after it is programmed, EEPROM can be reprogrammed multiple times. This makes it a versatile and useful type of memory for applications that require frequent updates or modifications to stored data.Rate this question:
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- 16.
Internet Explorer is a type of
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Operating System
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Browser
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IP address
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Compiler
Correct Answer
A. BrowserExplanation
Internet Explorer is a browser, not an operating system, IP address, or compiler. A browser is a software application used to access and view websites on the internet. Internet Explorer is a widely known web browser developed by Microsoft and was one of the most commonly used browsers in the early days of the internet. It allows users to navigate through web pages, display images and videos, and interact with online content.Rate this question:
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- 17.
Which one is a green house gas?
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O
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N
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CO2
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SO2
Correct Answer
A. CO2Explanation
CO2, or carbon dioxide, is a greenhouse gas because it has the ability to trap heat in the Earth's atmosphere. When released into the atmosphere through human activities such as burning fossil fuels, CO2 accumulates and contributes to the greenhouse effect, leading to global warming and climate change. This makes CO2 a significant contributor to the environmental issues we face today.Rate this question:
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- 18.
Which one is the intensity level of noise
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Centimeter
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Decibel
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Newton
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Watt
Correct Answer
A. DecibelExplanation
The intensity level of noise is measured in decibels (dB). Decibel is a unit used to quantify the level of sound or noise. It is a logarithmic scale that measures the ratio of the sound pressure level to a reference level. The higher the decibel level, the louder and more intense the noise is perceived to be. Centimeter, Newton, and Watt are not units used to measure the intensity level of noise.Rate this question:
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- 19.
Which one correct?
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Option a
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Option b
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Option c
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Option d
Correct Answer
A. Option a -
- 20.
Which one correct?
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Option a
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Option b
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Option c
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Option d
Correct Answer
A. Option a -
- 21.
Which one correct?
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Option a
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Option b
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Option c
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Option d
Correct Answer
A. Option a -
- 22.
Which one correct?
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Option A
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Option B
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Option C
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Option D
Correct Answer
A. Option B -
- 23.
Two dice are thrown simultaneously. what is the probability of getting two numbers whose product is even?
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3/4
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4/3
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8/9
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1/3
Correct Answer
A. 3/4Explanation
When two dice are thrown simultaneously, there are a total of 36 possible outcomes (6 outcomes for the first dice multiplied by 6 outcomes for the second dice). To find the probability of getting two numbers whose product is even, we need to consider the possible outcomes. The product will be even if at least one of the dice shows an even number. There are 18 outcomes where at least one dice shows an even number (3 even numbers for the first dice multiplied by 6 outcomes for the second dice). Therefore, the probability is 18/36, which simplifies to 1/2 or 0.5. This is equivalent to 3/4.Rate this question:
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- 24.
A computer port is used to?
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Communicate with hard disks
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Donwload files
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Communicate with other computer peripherals
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None of the above
Correct Answer
A. Communicate with other computer peripheralsExplanation
A computer port is used to establish a connection between a computer and other peripheral devices such as printers, scanners, keyboards, mice, and external storage devices. It allows the transfer of data and signals between the computer and these peripherals, enabling them to communicate and work together effectively.Rate this question:
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- 25.
Which one correct ?
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Option a
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Option b
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Option c
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Option d
Correct Answer
A. Option c -
- 26.
Which of the following is not the unit of energy?
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kg m
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kcal
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Watt
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Watt hours
Correct Answer
A. WattExplanation
The unit of energy is not watt. Watt is the unit of power, which is the rate at which energy is transferred or converted. Energy can be measured in units such as kilogram meter (kg m), kilocalorie (kcal), or watt-hour (Watt hours).Rate this question:
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- 27.
Which one correct?
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Option a
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Option b
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Option c
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Option d
Correct Answer
A. Option b -
- 28.
Which one correct?
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Option A
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Option B
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Option C
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Option D
Correct Answer
A. Option C -
- 29.
Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be
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160 ohms
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80 ohms
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20 ohms
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10 ohms
Correct Answer
A. 10 ohmsExplanation
The resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional area. In this case, the conductor with the smaller cross-sectional area has a resistance of 40 ohms. Since the cross-sectional area is four times smaller, the resistance of the other conductor will be four times larger. Therefore, the resistance of the other conductor will be 4 * 40 ohms, which is equal to 160 ohms.Rate this question:
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- 30.
A 3-phase 4-wire system is commonly used on
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Primary transmission
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Secondary transmission
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Primary distribution
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Secondary distribution
Correct Answer
A. Secondary distributionExplanation
A 3-phase 4-wire system is commonly used on secondary distribution. This is because the secondary distribution refers to the delivery of electricity from a distribution transformer to individual customers. A 3-phase 4-wire system is ideal for this purpose as it provides a balanced and efficient distribution of power, allowing for greater reliability and capacity. Additionally, the 4-wire system allows for the inclusion of a neutral wire, which is necessary for the safe and effective distribution of electricity to residential and commercial buildings.Rate this question:
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- 31.
The maximum velocity of a particle moving with simple harmonic motion is
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ω
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ωr
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ω2r
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ω/r
Correct Answer
A. ωrExplanation
The maximum velocity of a particle in simple harmonic motion is given by the product of the angular frequency (ω) and the amplitude (r) of the motion. This is because the velocity of the particle is directly proportional to the amplitude of the motion and the angular frequency determines the rate at which the particle oscillates. Therefore, the correct answer is ωr.Rate this question:
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- 32.
GUI stands for
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Graph Use Interface
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Graphical Universal Interface
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Graphical User Interface
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Graphical Unique Interface
Correct Answer
A. Graphical User InterfaceExplanation
GUI stands for Graphical User Interface. It is a type of interface that allows users to interact with electronic devices through graphical elements such as icons, buttons, and menus. This interface is designed to be intuitive and user-friendly, making it easier for users to navigate and operate the device or software. The graphical elements provide a visual representation of the functions and options available, making it easier for users to understand and access them. GUIs are widely used in various electronic devices and software applications to enhance the user experience.Rate this question:
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- 33.
Which of the following statement is correct?
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A semiconductor is a material whose conductivity is same as between that of a conductor and an insulator
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A semiconductor is a material which has conductivity having average value of conductivity of metal and insulator
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A semiconductor is one which conducts only half of the applied voltage
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A semiconductor is a material made of alternate layers of conducting material and insulator
Correct Answer
A. A semiconductor is a material whose conductivity is same as between that of a conductor and an insulatorExplanation
Semiconductors are materials that have conductivity levels between those of conductors and insulators. Conductors have high conductivity, allowing electric current to flow easily, while insulators have low conductivity, preventing the flow of electric current. Semiconductors fall in between, with a moderate level of conductivity. This makes semiconductors useful in various electronic devices, as their conductivity can be controlled and manipulated.Rate this question:
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- 34.
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is
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β/2
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30° + β/2
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45° + β/2
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60° + β/2
Correct Answer
A. 45° + β/2Explanation
The range of a projectile is the maximum horizontal distance it can travel. To maximize the range, the projectile needs to be launched at an angle that balances the vertical and horizontal components of its velocity. This angle is 45 degrees. Adding β/2 to this angle will not change the fact that 45 degrees is the optimal angle for maximum range. Therefore, the correct answer is 45° + β/2.Rate this question:
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- 35.
Young’s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length by
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Half
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Same amount
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Double
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One-fourth
Correct Answer
A. Same amountExplanation
Young's modulus is a measure of the stiffness of a material. It is defined as the ratio of stress to strain. In the case of a wire, Young's modulus is the stress required to increase the length of the wire by the same amount compared to its original length. Therefore, the correct answer is "Same amount" because Young's modulus measures the amount of deformation in the wire.Rate this question:
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- 36.
What is the output of this C code ? #include<stdio.h> main() { int a=0, b=1; if(b>0) if(a>0) printf("True"); else printf("False"); }
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True
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False
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No output
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Run time error
Correct Answer
A. FalseExplanation
The output of this C code is "False". This is because the condition "b > 0" is true, but the condition "a > 0" is false. Therefore, the code will execute the "else" statement and print "False".Rate this question:
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- 37.
A C preprocessor can start with
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A number
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A special symbol other than underscore
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$
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#
Correct Answer
A. #Explanation
A C preprocessor can start with the symbol #. The # symbol is used to indicate preprocessor directives in C programming. Preprocessor directives are instructions that are processed by the preprocessor before the compilation of the code. They are used to include header files, define constants, and perform other preprocessing tasks. Therefore, the correct answer is #.Rate this question:
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- 38.
In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:
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21/46
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3/13
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12/13
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3/8
Correct Answer
A. 21/46Explanation
The probability of selecting 1 girl and 2 boys can be calculated by multiplying the probability of selecting 1 girl (10/25) with the probability of selecting 2 boys (15/24) from the remaining students. This can be simplified to (10/25) * (15/24) = 150/600 = 21/46. Therefore, the correct answer is 21/46.Rate this question:
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- 39.
The power factor at resonance in R-L-C parallel circuit is
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Zero
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0.08 lagging
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0.8 leading
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Unity
Correct Answer
A. UnityExplanation
At resonance in an R-L-C parallel circuit, the reactive components cancel each other out, leaving only the resistive component. This means that the circuit behaves purely resistive, and the power factor is therefore unity.Rate this question:
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- 40.
The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is
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Zero
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Negative
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Positive
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About 2 ohms per degree
Correct Answer
A. PositiveExplanation
The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is positive. This means that as the temperature of the filament increases, its resistance also increases. Therefore, when the bulb is turned on and the filament heats up, its resistance increases, resulting in a higher hot resistance compared to its cold resistance.Rate this question:
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- 41.
The power developed by a body acted upon by a torque 'T' Newton meter (N - m) and revolving at ω radian/s is given by
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T.ω (in watts)
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T.ω/60 (in watts)
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T.ω/75 (in kilowatts)
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T.ω/4500 (in kilowatts)
Correct Answer
A. T.ω (in watts)Explanation
The power developed by a body acted upon by a torque 'T' Newton meter (N - m) and revolving at ω radian/s is given by T.ω (in watts). This formula calculates the power in watts based on the torque and angular velocity of the body.Rate this question:
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- 42.
In the equation of virtual work, following force is neglected
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Reaction of any smooth surface with which the body is in contact
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Reaction of a rough surface of a body which rolls on it without slipping
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Reaction at a point or an axis, fixed in space, around which a body is constrained to turn
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All of the above
Correct Answer
A. All of the aboveExplanation
The equation of virtual work is used to calculate the work done by a system of forces. In this equation, the reaction of any smooth surface with which the body is in contact is neglected. This is because the smooth surface does not provide any resistance or force that needs to be considered in the calculation. Similarly, the reaction of a rough surface of a body which rolls on it without slipping is also neglected because the rough surface does not affect the work done by the system of forces. Additionally, the reaction at a point or an axis, fixed in space, around which a body is constrained to turn is also neglected in the equation of virtual work. Therefore, all of the above reactions are neglected in the equation.Rate this question:
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- 43.
The stress induced in a body, when suddenly loaded, is _________ the stress induced when the same load is applied gradually.
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Equal to
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One-half
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Twice
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Four times
Correct Answer
A. TwiceExplanation
When a body is suddenly loaded, the stress induced in the body is twice the stress induced when the same load is applied gradually. This is because sudden loading causes a rapid increase in the force applied to the body, leading to a higher stress compared to gradual loading where the force is applied slowly over time.Rate this question:
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- 44.
Which one correct?
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Option a
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Option b
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Option c
-
Option d
Correct Answer
A. Option d -
- 45.
Which one correct?
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Option A
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Option B
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Option B
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Option C
Correct Answer
A. Option B -
- 46.
Which one correct?
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Option A
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Option B
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Option C
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Option D
Correct Answer
A. Option B -
- 47.
Coefficient of friction depends upon
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Area of contact only
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Nature of surface only
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Both (A) and (B)
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None of these
Correct Answer
A. Nature of surface onlyExplanation
The coefficient of friction is a measure of the amount of friction between two surfaces. It depends on the nature of the surfaces in contact, such as their roughness, smoothness, and the materials they are made of. The area of contact does not affect the coefficient of friction. Therefore, the correct answer is "Nature of surface only."Rate this question:
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- 48.
Which one correct?
-
A
-
B
-
C
-
D
Correct Answer
A. C -
- 49.
In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters?
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220 V
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220 √3 V
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220/√3 V
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None of the above
Correct Answer
A. 220 VExplanation
The voltmeters in each of the three coils of a three-phase generator will indicate the same voltage as the alternating voltage induced in the coils. Since the alternating voltage has an r.m.s. value of 220 V, the voltmeters will also indicate 220 V.Rate this question:
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Nov 20, 2023Quiz Edited by
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Mar 26, 2020Quiz Created by
JELETACADEMY
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