Airstreams Gate 4 Practice Test

These questions are part of the practice quiz. Start practicing

• Which OSI layer is responsible for end-to-end communication?
• What quantity is the rate of electrical flow in a circuit?
• In three-phase systems, what are the standard connection configurations called?
• In a wind park, SCADA measures which of the following?
• What does digital imply?
• State Bayes' theorem in probability.
• Which deadlock condition describes a situation where a process holding a resource waits for another resource that is currently held by another process?
• Which deadlock condition is characterized by resources that can be used by only one process at a time, causing processes to wait for others?
• Which statement correctly defines an eigenvalue of a matrix A?
• Keeping track of the common faults and their causes aids in ______.
• Low voltage is less than what volts?
• What is the total opposition to current flow in an AC circuit?
• The yaw rate unit is degrees per second. Which option expresses this unit correctly?
• What device provides a delayed trip due to overcurrent?
• Which description best matches an analog signal?
• What is the stationary part of a motor called?
• 3 circuits that use inductive sensors?
• What is the Big-O time complexity of a binary search on a sorted array?
• Which component is stationary and houses the magnetic field in many electric machines?
• In dynamic programming, what is the key difference between a 0/1 knapsack and an unbounded knapsack?
• What term describes opposition to current flow in any circuit?
• Amortized time complexity of inserting n elements into a hash table with resizing?
• What does the Central Limit Theorem assert?
• Digital systems represent information primarily using which concept?
• How long should foam dissipate after the turbine is stopped?
• What type of circuit prevents both yaw contactors from being energized at the same time?
• Which three activities are involved in passing information?
• Which type of sensor is used to count yaw position?
• If there are abrasions on gear teeth what component could be failing?
• The main shaft is hollow to allow passage of which cable harness?
• What part of the generator rotates?
• What changes between the two windings in a transformer?
• SCADA can monitor which of the following physical parameters on turbine components?
• In a binary search tree, what invariant must hold for every node?
• Which device is designed to switch higher currents?
• Which of the following sets lists items that are part of the turbine drive train's main components?
• If the primary cable untwist function fails, which safety mechanism is engaged?
• The use of multiple windings (pole pairs) in each phase primarily enables what outcome?
• In Amdahl's Law, what does P represent?
• At what ambient temperature do the gearbox oil heaters turn on?
• Which two components drive the pinion gear to rotate the nacelle yaw bearing?
• Which component does not rely on electromagnetic induction?
• On what mathematical basis is RSA cryptography primarily built?
• What determines the size of electrical components?
• Gearbox oil heaters activate when ambient temperature falls below which value?
• Which device provides wind direction data to the control system?
• What is the resistance of a PT100 at 0°C?
• Reactive power results in what effect on a generator?
• In CP, what is the A* algorithm primarily used for?
• SCADA provides a ______ for turbine operation from an off-site location.
• What is the purpose of normalization in a relational database?
• Mixing lubricants can cause premature failure of which subsystem?
• Low voltage threshold is below which volts?
• Which set lists only the components that are considered main components of a turbine drive train?
• Fiber optic cables being thinner and lighter contribute to which practical benefit?
• A safety chain or loop is configured in which arrangement?
• Which property stores energy in an electric field due to voltage?
• Using Amdahl's Law, speedup S = 1 / (P + (1-P)/N). With P = 0.7 and N = 4, which is the approximate speedup?
• What is the average lifetime of a wind turbine?
• Which description applies to the A* algorithm?
• In Gate CS, what is the primary purpose of a heap data structure?
• What is pipelining in computer architecture?
• In an ideal transformer, what is conserved across windings?
• Which device monitors the temperature of the main bearing?
• What is the gearbox oil capacity?
• Dynamic binding in object-oriented programming is achieved at runtime through which mechanism?
• Static binding occurs at compile time; dynamic binding occurs at runtime via which mechanism?
• One of the primary dangers of working on a turbine is:
• Which of the following is an advantage of fiber optic cables?
• Which statement about regular languages is true?
• If the load on a circuit is purely resistive, what can be said about the phase angle between voltage and current?
• Fiber optic cables being thinner and lighter primarily contributes to which practical benefit?
• Which deadlock condition occurs when a cycle forms where each process holds a resource needed by the next process?
• Which signal type is used in fiber optic signal transmission?
• Which term describes power wasted in the form of heat in circuits?
• A device that allows an ASYNCHRONOUS generator to connect to the grid is called what?
• Which statement best describes the nature of a spanning tree in graph theory?
• What stores energy in a magnetic field?
• In a fiber optic link, which component primarily generates the light used to carry the signal?
• Which device converts mechanical energy into electrical energy?
• Why is a scheduled maintenance event beneficial?
• Which statement correctly describes normally open contacts?
• Which property opposes changes in voltage?
• OL reading between two windings indicates what?
• Which skill is occasionally included as part of the General Aptitude section?
• Which device converts electrical energy into mechanical energy in a standard system?
• Which device consists of four diodes and converts AC to DC?
• Which conditions does the Central Limit Theorem require?
• Big-O complexity of standard matrix multiplication?
• Regular expression representing any single character from alphabet {a, b}?
• Power is the product of which two quantities?
• Inductive sensors are used to measure which parameters in the listed circuits?
• Which type of sensor provides generator and rotor speed data to the PLC?
• What components provide over-current protection?
• What is the primary advantage of working in a tubular tower over a lattice tower?
• Analog implies which of the following?
• Current will only flow when what is applied as an electrical force?
• Which statement best differentiates a pointer from a reference in C++?
• Which construct in C++ is an alias to an existing object?
• A fuse or circuit breakers interrupt current rating is:
• Which device generates the light signal in a fiber optic system?
• Which abbreviation identifies a contact that is closed when not energized?
• Which condition is important for the Newton-Raphson method to converge to a root?
• What is the derivative of sin(x)?
• What is the primary reason DFS uses space proportional to the height of the graph or tree?
• Which device stores energy chemically?
• Chomsky hierarchy level for regular languages?
• What is the amount of electrical flow called?
• Which device triggers to prevent cable twist if the automatic untwist function fails?
• Spanning tree of a connected graph?
• You should always be trained on what system where you work?
• On a control contact, what does N.O. stand for?
• On a contactor, A1 and A2 are the supply terminals. Which statement correctly describes their roles?
• Name two topics commonly covered under Engineering Mathematics in Gate exams.
• During a breadth-first search, which data structure is typically used to manage the frontier of nodes to visit?
• What is the key difference between TCP and UDP?
• What is the Laplace transform used for in differential equations?
• What is a Turing machine?
• Which electrical property opposes changes in current?
• SCADA stands for?
• What are the types of connections in a 3-phase component?
• What is the most common configuration for three-phase motors?
• Which devices store electrical energy?
• What is required between a magnetic field and a conductor to generate electricity?
• Which set of properties is represented by ACID in database transactions?
• What is the Newton-Raphson method used for?
• Define a vector norm.
• Scheduling maintenance is intended to reduce what?
• Which energy type is transmitted by the main shaft from the hub to the gearbox?
• What does a p-value represent?
• Which device monitors the temperature of the turbine's main bearing?
• Shut the turbine down if which condition is present on the gear teeth?
• Which component allows current to flow in one direction but blocks it in the other?
• Kleene's theorem states the equivalence among which formalisms?
• Which deadlock condition is present when a resource cannot be forcibly removed from a process?
• What does DHCP do in a network?
• Which device stores energy in an electric field?
• What is the average-case time complexity of QuickSort?
• In which type of circuit do transformers operate?
• When the pinion gear is driven by the _____ and the _____, the yaw bearing rotates the nacelle.
• What is the purpose of a subnet mask in IP networking?
• What is the primary difference between a DFA and an NFA?
• Which component is used to prevent the hub from rotating during maintenance?
• What voltage supplies voltage to the yaw motor?
• A fuse opens when there is what condition?
• What should the multimeter read between the two windings of a transformer?
• When voltage and current are out of phase, which quantity represents the power in the circuit?
• What types of loads are bearings in a wind turbine subject to?
• What is the recommended approach to pacing through sections to reduce time pressure?
• If a circuit's voltage remains constant but resistance increases, what happens to current?
• Which statement describes maintenance safety regarding working at height?
• Which component of a generator is the rotating element?
• Which property is not a component of ACID?
• In Gate CS, which two primary sorting algorithms are commonly compared for understanding complexity?
• What type of data is found on a meteorological report?
• What is the purpose of monitoring yaw position?
• Power sources are located on which portion of the sheet?
• Which statement correctly contrasts TCP and UDP in terms of connection orientation and reliability?
• Which term describes current that flows in a single direction?
• Which element stores energy in a magnetic field?
• Which statement best describes DFS space complexity on a graph represented with adjacency lists?
• What is a Type I error in hypothesis testing?
• Why are mock tests useful for Gate 4 practice?
• How many degrees/second does the turbine yaw?
• Circuits are divided into which two parts?
• Thread damage during maintenance procedures is typically caused by which factor?
• Which electrical property describes the ability to store energy as electrical charges?
• During wind turbine maintenance, which items are most at risk if work is performed inadequately?
• Production levels in a wind park directly influence which financial factor?
• Which term is used for energy storage in a magnetic field due to current?
• What devices have polarity?
• Which component opposes the change in voltage?
• In graph traversal, which statement correctly contrasts DFS and BFS space usage?
• Which SCADA status category indicates the system requires service but is not currently faulted?
• Which statement describes the impact of maintenance scheduling?
• The wind vane sends what data to the control system?
• If the resistance decreases while connected to a fixed voltage source, what happens to current?
• What quality changes with temperature in a PT 100?
• What are the most common SCADA status categories?
• SCADA allows operators to adjust actions of the controller by adjusting the ______.
• What should power factor be (preferably)?
• Which statement best describes the triangle inequality property of a vector norm?
• Why are multiple windings (pole pairs) used for each phase of a motor or generator?
• If P(A) = 0.5, P(B) = 0.4, and P(B|A) = 0.6, what is P(A|B) according to Bayes' theorem?
• Which lubrication methods are used for the gearbox?
• What defines a functional dependency in relational databases?
• Difference between the rotor's physical rotation speed and the stator's rotating magnetic field is called what?
• Which device converts alternating current to direct current?
• What condition is necessary to produce electricity by moving a conductor through a magnetic field?
• What is the time and space complexity of the naive matrix multiplication algorithm for two n x n matrices?
• What depends on production?
• What is the difference between a relay and a contractor?
• In troubleshooting, which fundamental question helps locate the fault?
• What is the purpose of Gaussian elimination?
• Which concept defines the number of cycles per second in an AC signal?
• Which component allows electrical connections to pass through rotating assemblies?
• Which term describes converting information into a format suitable for transmission?
• Which device converts direct current to alternating current?
• What is the difference between convex and concave optimization objectives?
• In fiber optics, attenuation is quantified in which unit?
• Can current flow with no voltage?
• Which algorithm is commonly cited as having an average-case time complexity of O(n log n)?
• What is availability in the SCADA data?
• Which components are polarity sensitive and must be oriented correctly in a circuit?
• Yaw proximity sensors give turbine position data in ______.
• The main shaft transmits what kind of energy from the hub to the gearbox?
• In schematic diagrams, a switch that is not energized is depicted in which state?
• What happens when a fuse operates due to over-current?
• RAID 0 is characterized by which of the following?
• Typical space complexity of DFS on a graph with n vertices in an adjacency list?
• Which device provides delayed response to overload conditions?
• What is the primary function of a power supply in control circuits?
• Which term describes the energy stored in a magnetic field?
• What is the risk associated with RAID 0?
• In operating systems, what does a context switch entail?
• How many times a year is maintenance scheduled on a modern wind turbine?
• When is the cable twist device activated?
• Which statement about a heap-based priority queue is true?
• To change the rotation direction of a three-phase motor, you must change the:
• What properties affect electricity?
• Which statement correctly identifies what the flex coupler connects?
• Which statement best describes the relationship between power and control in a circuit?
• What is the standard frequency in North America versus the rest of the world?
• If an asynchronous generator is connected to the grid via a converter, what is the converter's primary function?
• What sensors are used to count yaw position?
• If yaw rate is 0.5 degrees per second, how many degrees will the nacelle rotate in 10 seconds?
• Which quantity stores energy in an electric field caused by voltage?
• What device changes electrical energy to mechanical?
• What is the number of cycles per second in alternating current?
• The interrupt current rating of a protective device is defined as:
• Which statement best describes impedance in AC circuits?
• Light loss on a fiber optic cable is measured in what unit?
• What does a circuit breaker do?
• What does an inner join return?
• Which option correctly identifies the three broad components commonly described in the General Aptitude section of Gate 4 practice tests?
• What does a foreign key in a relational database do?
• A diode conducts current when it is in which bias condition?
• In BFS, the worst-case space usage can reach which of the following?
• Which data structure provides average-case O(1) insertion and lookup with hashing?
• Kleene's theorem establishes the equivalence between regular expressions and which other formal device?