Question 01: A meter reads 117.50 V and the true value of the voltage is 117.42 V. Determine thestatic correction for this instrument.
A. -0.92 V
B. -0.08 V
C. 0.08 V
D. 0.92 V
Answer: B
Question 02: PLC stands for _ logic controller.
A. programmable
B. piezo-electric
C. Process
D. periodic
Answer: A
Question 03: Which of the following parameters is mostly caused by leakage over the insulators, and is always neglected in a power transmission line?
A. Shunt conductance
B. Capacitance
C. Inductance
D. Resistance
Answer: A
Question 04: Which of the following is NOT an advantage of diesel power plants?
A. Low maintenance cost
B. Can be started and put on load quickly
C. Can burn fairly wide range of fuels
D. Occupy less space
Answer: A
Question 05: Which of the following is NOT an advantage of electric heating?
A. This system is free from dirt.
B. Simple and accurate pressure control can be made either by manual or fullyautomatic switches.
C. Special type of heating can be done very accurately by electric heating system.
D. The overall efficiency of electric heating is much higher.
Answer: B
Question 06: Overheating of an insulator is caused by __________K from one metal part to another. This causes uneven expansion of porcelain, thus shattering the insulation along with cracking.
A. Mechanical stress
B. Short-circuit
C. Porosity
D. Flash-over
Answer: D
Question 07: ………. Contact are used in battery ignition systems, vibrators and electric razors.
A. Nickel
B. Iron and steel
C. Tin
D. Tungsten
Answer: D
Question 08: Which of the following is NOT an advantage of Pulse Duration Modulation (PDM)recording?
A. It has a less complex electronic circuitry and therefore the reliability of such system is high.
B. It has high S/N ratio.
C. It has high accuracy due to the fact that it can be self-calibrated.
D. It has the ability to simultaneously record information from a large number of channels.
Answer: A
Question 09: Which of the following does not happen in a simple gas turbine in plant plant?
A. Combustion System
B. Auxiliary equipment such as starting device, fuel system, oil system etc.
C. Turbine
D. An expander mounted on a single shaft
Answer: D
Question 10: Prohibit Which of the following is not a mononomial meaning used for both HT (11 kV) and LT (415 V) distribution lines?
A. every possible withdrawal tactic
B. Danger Ray with in board
C. Street View Viewing in Light Fitting
D. Guarding Wire
Answer: C
Question 11:
A. refrigerator
B. water cooler
C. air conditioner
D. does not belong to any domestic appliance
Answer: B
Question 12: Which of the following is NOT a merit of fuse?
A. It interrupts enormous short circuit current without noise.
B. Rewiring or replacing fuses after operation consumes minimal amount of time
C. It has current limiting effect.
D. It is the cheapest type of protection.
Answer: B
Question 13: Which of the following is NOT essential in a nuclear-fueled power producing system?
A. Equipment to convert thermal energy contained in the hot coolant to electric power
B. A coolant system to remove the heat produced
C. A coolant system to transfer the heat produced
D. A controlled fusion heat source
Answer: D
Question14: Which of the following is used by the serial port to control data rates?
A. Register PCON
B. Register SBUF
C. Register SCON
D. Pin RXD and TXD
Answer: A
Question 15: Prohibit Which of the following is not a correct application of shift registers?
A. Shift registers are used for day data transfer transfer and day data computation.
B. serial-in-serial-out and parallel-in-parallel-out (parallel-in-parallel-out) using shift registers This is done in order to maintain the readiness of time in the total circuit.
C. The shift register is used for temporary day data storage.
D. A parallel-in serial-out shift register for converting parallel day data to graded day data is used.
Answer: B
Question 16: Which of the following is NOT the reason behind selecting marble for making ‘formers’for inductance coils?
A. It is comparatively cheap.
B. It can be easily machined.
C. It has a very small co-efficient of thermal expansion.
D. It is a non-magnetic material.
Answer: C
Question 17: Which of the following is NOT a secondary instrument?
A. Wattmeter
B. Tangent galvanometer
C. Ammeter
D. Voltmeter
Answer: B
Question 18: While selecting a site for hydro-electric plant, select the factor which should not be considered.
A. Type of land area of the site
B. Availability of water
C. Availability of site
D. death days
Answer: D
Question 19: The timer on delay instruction is a three word instruction. Which of the following isNOT the correct word?
A. Accumulator word 2
B. Preset word 1
C. Base word 1
D. Status word 0
Answer: C
Question 20: The no-load current drawn by a transformer is usually _ of the full-load current.
A. 10 to 15 percent
B. 15 to 20 percent
C. 2 to 5 percent
D. 0.2 to 0.5 percent
Answer: C
Question 21: Which of the following is not a correct component of modern steam power plant?
A. Ash precipitators
B. Wagon tippler
C. Switch yard
D. Induced draught mill.
Answer: D
Question 22: The rod and pipe electrodes should NOT be less than _ in length.
A. 15 m
B. 2.5 m
C. 1.5 m
D. 6 m
Answer: B
Question 23: Which of the following methods of starting is required for slip ring induction motors ofhigh rating?
A. Star delta starters
B. Rotor resistance starters
C. Direct on line starters
D. Auto-transformer starters
Answer: B
Question 24: Which of the following Port are multifunctional for 8051 microcontroller?
A. Port 3 (10-17)
B. Port 4 (Pins 21-28)
C. Port 0 (32-39)
D. Port 1 (Pins 1-8)
Answer: A
Question 25: The transmission lines in the middle cannot be analyzed using which of the following methods?
A. NAME METHOD
B. Method of noun noun
C. load and end distance
D. Nominal T method
Answer: B
Question 26: Which of the following statements is INCORRECT for the electrical conducting material, copper?
A. It is highly malleable and ductile.
B. It has lowest resistance per unit weight.
C. Its colour is reddish.
D. It has low contact resistance.
Answer: B
Question 27: Which type of chopper circuit is generally used for the reversible DC motor and corresponding breaking operation?
A. Type E chopper.
B. Type C chopper
C. Type A chopper
D. Type D chopper
Answer: B
Question 28: When the length of an overhead transmission line is less than 80 km with an operating voltage upto 20 kV, it is considered to be a/an ……..
A. short transmission line
B. medium transmission line
C. ultra-long transmission
D. long transmission line
Answer: A
Question 29: Which of the following is an advantage of rheostatic control method (one of the speed control methods) of DC shunt motor?
A. Due to low power losses the method is inexpensive and highly efficient.
B. As armature current is less than field current, rheostat required is of small size andcapacity.
C. The method needs economical heat dissipation arrangements.
D. Easy and smooth speed control below normal is possible.
Answer: D
Question 30: Which of the following qualities should not be present in the cover that should be used in the insulating line?
A. It should not be sufficient mechanical resistance for cold weather conditions.
B. This time, uv. It should not be resistant to UV, ozone etc.
C. It should not be rigid and not stable.
D. It must not have sufficiently strong resistance to power-tracking.
Answer: C
Question 31: In 11 kV lines, when conductors are in horizontal or delta formation, _ is provided.
A. cage guard
B. square guard
C. box guard
D. cradle guard
Answer: D
Question 32: Which of the following is used in household applications such as washing machines, ceiling fans and water coolers?
A. Single phase induction motor
B. Squirrel cage induction motor
C. Slip-ring induction motor
D. Three phase induction motor
Answer: A
Question 33: ……….._ is used for execution of a program.
A. Data memory
B. Executive memory
C. User memory
D. System memory
Answer: D
Question 34: …….. is NOT one of the leading PLC manufacturers.
A. MODICON
B. SIEMENS
C. ALLEN Bradley
D. NEMS
Answer: D
Question 35: For ………. the frequency range is limited to a maximum of about 5 KHz.
A. carbon microphones
B. piezoelectric microphones
C. capacitive microphones
D. dynamic microphones
Answer: A
Question 36: Which one of the following is a flame metal?
A. Duralumin
B. Brass
C. Lead
D. Steel
Answer: D
Question 37: Which one of the following is not a method to improve the string efficiency of insulators?
A. Grading of insulators
B. Guard ring
C. Disc porosity
D. Selection of m
Answer: C
Question 38: Hexagonal closed-packed (HCP) type crystal structure is found in _.
A. zinc
B. copper
C. lead
D. silver
Answer: A
Question 39: Which of the following is an INCORRECT reason due to which instrumental errors arise?
A. Loading effects of instruments
B. Partial measuring experience of measurer in the instruments
C. Inherent shortcomings in the instruments
D. Misuse of the instruments
Answer: B
Question 40: Which of the following logic functions is used for load connecting “YES” contact to the left-hand bus bar?
A. LD
B. LD NOT
C. AND NOT
D. NOT
Answer: A
Question 41: __ is a conductor from which tapings are taken for supply to the consumers.
A. Delivery unit
B. Service main
C. Feeder
D. Distributor
Answer: D
Question 42:
A. induced link
B. biopolar link
C. monopolar link
D. homopolar link
Answer: B
Question 43: __ is NOT one of the application fields of a diesel power plant.
A. Central stations with capacity of 10-50 MW
B. Mobile plants
C. Standby units
D. Peak load plant
Answer: A
Question 44: From the following options, __ is the most energy efficient bulb.
A. fluorescent bulb
B. incandescent bulb
C. mercury bulb
D. compact fluorescent light bulb
Answer: D
Question 45: The fuses that have a high rupturing capacity and that are available in ratings from 2to 1250 amperes is:
A. Diazed cartridge fuses
B. Filler type cartridge fuses
C. D-type cartridge fuses
D. Link-type HRC cartridge fuses
Answer: D
Question 46: The horizontal distance between two consecutive supports of an overhead head line is called __
A. span
B. sag
C. end to end length of sag
D. length of span
Answer: D
Question 47: What will be the standard voltage for three phase at which the supply authority supplies power to the consumer?
A. 240 V, 50 Hz, 4 wire
B. 240 V, 50 Hz, 2 wire
C. 415 V, 50 Hz, 4 wire
D. 415 V, 50 Hz, 3 wire
Answer: C
Question 48: A strategy that involves repair or replacement only when a worsening of the condition results in a functional failure; What is it called?
A. Preventive Maintenance
B. Status Check
C. Active Maintenance
D. Reactive Maintenance
Answer: D
Question 49: Which of the following statements relevant to pin insulators is INCORRECT?
A. They can be of single piece or multipiece.
B. Pin insulators are commonly used on rural and urban 11 kV primary distribution lines.
C. They can take conductor load in tension which often occurs at angles and at dead ends.
D. Pin insulators can be used up to 33 kV.
Answer: C
Question 50: Which of the following is the correct use of ‘delta/delta’ connections?
A. This is the best match for ultra HV transformers.
B. This suits large LV transformers.
C. This connection is economical for HV transformers.
D. This is used for smaller power systems.
Answer: B
Question 51: Which of the following ancillary is necessary to start a production unit of a hydro plant?
A. Fans and cooling oil pumps
B. Gate hoists
C. Battery charging units etc.
D. Exciter
Answer: D
Question 52: Which of the following is NOT an advantage of air blast circuit breakers?
A. This type of circuit breaker is almost maintenance free.
B. High speed operation is achieved.
C. The stability of the system can be well maintained.
D. There is no possibility of air leakages at the pipe fittings.
Answer: D
Question 53: Which of the following is not an advantage of pipeline coal transport system for thermal power plants?
A. It provides ease in installation and increases safety in operation.
B. Loss of coal in transportation due to theft and pilferage is partially eliminated.
C. Manpower requirement is less.
D. Has the highest reliability.
Answer: B
Question 54: __ is defined as the luminous intensity per unit projected area of the surface in the given direction.
A. Illumination
B. Luminance
C. Lumen
D. Candle power
Answer: B
Question 55: Which of the following is a wrong advantage of a gas turbine power plant over a steam power plant?
A. gas turbine plant is more preferable as a peak load plant because it can be brought on load quickly and surely.
B. Fuel storage is very small and it is relatively easy to handle.
C. The thermal efficiency of a gas turbine plant increases below 550 °C.
D. Gas turbine plants can operate economically for low operating hours.
Answer: C
Question 56: Low line (LT) maintenance does NOT include:
A. tree clearance
B. alignment of poles
C. removal of bird nests
D. replacement of batteries of each pole base
Answer: D
Question 57: Low tension cables are generally used up to:
A. 1 kV
B. 11 kV
C. 66 kV
D. 33 kV
Answer: A
Question 58: Which of the following is NOT one of the commonly used equipment for ash handlingin large and medium size steam power plants?
A. Pneumatic conveyor.
B. Trollies or rail cars.
C. Belt elevator
D. Bucket conveyor
Answer: C
Question 59: What is the function of wrenches, used for distribution line maintenance?
A. Used to allow rotary motion in only one direction and prevent the motion in the opposite direction.
B. Used to provide grip to apply torque for turning objects such as nuts or bolts.
C. Used to turn, tighten or remove screws.
D. Used to tighten screws of fixed sizes
Answer: A
Question 60: Internal combustion engine drive used for road transport is a type of:
A. Non-electric traction system
B. conventional electric traction system
C. electric traction system
D. non-battery drive traction system
Answer: A
Question 61: “An Act to provide for the efficient use and conservation of energy and for matters connected therewith or incidental there to” The given statement is true for which of the following options?
A. Energy Conservation Act,2000
B. Energy Conservation Act,2003
C. Energy Conservation Act,2001
D. Energy Conservation Act,2007
Answer: C
Question 62: Which of the following features is NOT desirable while protecting a transmission line?
A. Simultaneous reclosers
B. Independent phase relaying, etc.
C. Multiple pole switching
D. Discrimination between external and internal faults
Answer: C
Question 63: In the form of bits, information is embedded in the ROM by the ……….. ROM process?
A. copying
B. programming
C. retrieving
D. reading
Answer: B
Question 64: Asynchronous counters are also known as __.
A. ripple counters
B. square counters
C. VLSI counters
D. SSI counters
Answer: A
Question 65: ……………..Is a metal clad switch gear with insulating barriers?
A. indoor switchgear
B. compartmented switchgear
C. distribution switchgear
D. door kiosk switchgear
Answer: B
Question 66: The electrical energy available from ……… is for general sale to customers who wish to purchase it.
A. central stations
B. captive power stations
C. reserved power stations
D. industrial power stations
Answer: A
Question 67: Which of the following motors is used in refrigeration and air conditioning?
A. DC cumulative motor.
B. Small torque squirrel-cage induction motor for small units
C. Three-phase shunt wound commutator motor
D. Slip-rings induction motor for large installation
Answer: A
Question 68: A ………… arithmetic circuit adds two binary digits, giving a sum bit and a carry bit.
A. full-adder
B. half-subtractor
C. half-adder
D. full-subtractor
Answer: C
Question 69: The feature desired for bus protection does NOT include:
A. Freedom from unwanted operation
B. Separate control of trip circuit of each circuit-breaker
C. Stability for external faults
D. Operation due to CT saturation or power swings
Answer: D
Question 70: Choppers do NOT provide:
A. Regeneration
B. AC regulation
C. Fast response
D. Smooth control
Answer: B
Question 71: Which of the following is not an advantage of oiled cables over solid cables?
A. It may also be well impregnated.
B. The possibility of vacancy formation is eliminated.
C. The maximum allowable stress increases.
D. Installation and maintenance are simple.
Answer: D
Question 72: The relative permeability of _ materials is slightly less than unity.
A. Ferromagnetic
B. paramagnetic
C. diamagnetic
D. anti-ferrimagnetic
Answer: C
Question 73: Which of the following is not included in the specific block in PLC block diagram?
A. Chassis
B. Data Supply Module
C. Central Processing Unit
D. Communication Interface Module
Answer: B
Question 74: Solid lump fuels for steam boilers are controlled by ………..
A. Unit Box
B. Injector
C. stalker
D. burner
Answer: C
Question 75: Which of the following is an INCORRECT advantage of gas turbine power plants overdiesel power plants?
A. Gas turbine power plants have lower installation and maintenance cost.
B. The work developed per kg of air is large.
C. Gas turbine power plants have a comparatively longer life.
D. Gas turbine power plants display higher mechanical efficiency.
Answer: C
Question 76: Which of the following is a deficiency of wind energy?
A. Wind power systems do not pollute the atmosphere.
B. It does not require provision of fuel and transportation.
C. Naturally they fluctuate.
D. It is a renewable source of energy.
Answer: C
Question 77: Which of the following is not an advantage of non-conventional sources of energy?
A. They do not pollute the environment.
B. It is well suited for decentralized use.
C. They are available in large quantities.
D. They are noise free sources of energy.
Answer: A
Question: 78:
A. आर्मेर्चर चालक की कुल संख्या
B. आर्मे र्मेचर के के भी तर कि सी भी समां मांतर ले लेन में में प्रे प्रेरि त EMF
C. चा लक में में समां मांतर प्ले प्लेन की सं संख्या
D. आर्मे र्मेचर के के भी तर समां मांतर ले लेन की सं संख्या
Answer: A
Question 79:
A. Screened fault
B. Chassis earth connection
C. Chassis connection
D. Position of fault to frame
Answer: D
Question 80: The electrical connections can be ensured between the commutator as well as exterior load circuit with the help of:
A. poles shoe
B. Shaft
C. Brushes
D. Poles
Answer: C
Question 81:
A. पृष्ठ तनाव (surface tension)
B. संवेग (momentum)
C. संदृढ़ता (stiffness)
D. गतिक श्यानता (dynamic viscosity)
Answer: C
Question 82: When light is produced by fittings that throw all the light on the ceiling, from where it is reflected to the area to be lighted, this method of lightning arrangement is known as:
A. general diffusing system
B. semi-direct system
C. indirect lightning arrangement
D. direct lightning arrangement
Answer: C
Question 83: _ converts binary-coded information to unique outputs such as decimal, octal digits, etc.
A. Decoder
B. Demultiplexing
C. Multiplexing
D. Encoder
Answer: A
Question 84: Which one of the following factors does not affect the schedule of starting a new business?
A. weather conditions
B. Profitability
C. Consumer spending
D. Government Policies
Answer: A
Question 85: …….. is an example of a passive transducer.
A. Electromagnetic pickup
B. Thermocouple
C. Piezoelectric
D. Linear variable differential transformer (LVDT)
Answer: D
Question 86: The simplest form of PLC programming, also known as relay logic, is/are _.
A. sequential block diagram
B. ladder diagrams
C. instruction diagrams
D. function block diagram
Answer: B
Question 87: In which of the following starters is No Volts Coil (NVC) connected in series with the field coil?
A. Three point starters
B. Two point starters
C. Five point starters
D. Four point starters
Answer: A
Question 88: Which of the following symbols belongs to the lamp and lightning apparatus, that isgroup of three 40 W fluorescent lamps?
Answer: D
Question 89: Which of the following statements is INCORRECT for a microcontroller?
A. It has more than two instructions to move data between memory and CPU.
B. It has many bit handling instructions.
C. It is less flexible from the design point of view compared to a microprocessor.
D. It has a separate memory map for data and code.
Answer: A
Question 90: One of the following instruments is used to measure AC current only. Identify that instrument.
A. Multiplexer
B. Megger
C. Induction type ammeter
D. Permanent Magnet Type ammeter
Answer: C
Question 91: Identify the incorrect statement regarding the problems encountered in the operation of large wind power generators
A. In case of zero velocity, the power generated will be zero and this means that some storage system has to be involved with the windmill.
B. AC must have a constant angular velocity to generate electricity and this means very sensitive operation.
C. Windmill gardens will have large areas of land available due to sufficient space, which cannot in any way be used for other commercial movement methods.
D. Locating a site where there is a reasonable average high wind velocity is essential.
Answer: C
Question 92: ……………charges include general office expenses, rent rates of lightning and heating, depreciation of furniture and office equipment.
A. Profit purchase system
B. Time value
C. Overhead
D. Contingency
Answer: C
Question 93: Which of the following is not an electrical property of matter?
A. Inductivity
B. Conductivity
C. Dielectric strength
D. Temperature coefficient of resistance
Answer: A
Question 94: Which of the following applications is incorrect for a gas turbine plant for the purpose of power plant engineering?
A. working as combination plants with conventional steam boilers
B. To supply mechanical drives of accessories
C. To drive generators and supply peak loads to steam, diesel or hydro plants
D. Acting as good part load efficiency power plant
Answer: D
Question 95: Which of the following are the disadvantages of underground power stations?
A. Better rock bearing properties
B. Construction work in adverse weather
C. Possession Saturning Stations have more freedom in the stations.
D. Cost of manufacturing power station and accessories
Answer: D
Question 96: Which of the following is NOT one of the rectifier types?
A. Uncontrolled
B. Fully controlled
C. Half controlled
D. Percent controlled
Answer: D
Question 97: Which of the following must NOT be considered while drawing a schematic diagram?
A. Branched circuits of equal importance should be drawn similar to one another.
B. Switches, push buttons and contacts should be drawn in such a way that their movement is from left to right.
C. Switches, push buttons and contacts should be drawn in actuated position.
D. The supply lines should be drawn horizontally while the different circuit connections should be drawn vertically.
Answer: C
Question 98: Among the alternatives, what is the most suitable location to install the main switch board?
A. In the kitchen adjacent to the entrance hall
B. on the walls exposed to the sky for sufficient sunlight
C. At / near the entrance of the building
D. within 2.5 meters of any washbasin
Answer: C
Question 99: Which of the following is NOT one of the factors that affects the speed of DC motors?
A. The voltage across the armature
B. The atmospheric temperature
C. The applied voltage
D. The flux
Answer: B
Question 100: Which of the following is NOT one of the advantages of a single three-phase transformer bank over a three single-phase transformer bank?
A. The cost is less.
B. It weighs less.
C. The core is of larger size which makes it robust.
D. It occupies less space for same rating.
Answer: C
Question 101: For which type of motor are both the given characteristics true?
- No-load condition is dangerous.
- Variable speed.
A. Cumulative compound motors
B. Shunt motors
C. Differential compound motors
D. Series motors
Answer: D
Question 102: Which of the following is NOT necessary to be checked while maintaining stay wire?
A. Inclined length of stay wire
B. Guy wire tightness
C. Corrosion of guy rod and stay wire
D. Creeper on the stay wire
Answer: A
Question 103: 1 kg of atomic material (i.e., uranium) can produced as much energy as produced by burning _.
A. 300 tonnes of high grade coal.
B. 3,300 tonnes of high grade coal
C. 3,000 tonnes of high grade coal.
D. 30,000 tonnes of high grade coal
Answer: C
Question 104: Which of the following mechanical switching devices is used in higher current carrying capacity, the remaining one position (either open or closed) operated by hand, capable of creating, carrying and breaking overload conditions ?
A. push button
B. limit switch
C. Contact
D. relay
Answer: C
Question 105: Which of the following points should not be considered while selecting the type of wiring?
A. anticipated future changes
B. Installation Size
C. Fire Hazards
D. Atmospheric Hazards
Answer: C
Question 106: Which of the following statements is INCORRECT for SMPS?
A. Ripples are more at the output.
B. Power handling capacity is high.
C. Series pass transistor acts as a switch.
D. Response to load variation is fast.
Answer: D
Question 107: Which of the following is NOT one of the advantages of an HVDC transmission System?
A. The current density is uniform throughout the line. Hence, there is no skin effect in the HVDC system
B. This system needs some additional equipment such as converter transformer ,electrical and mechanical auxiliaries, pole control, valve control, and many more
C. Economical transmission of the bulk power
D. Flexibility in operation
Answer: B
Question 108: Which of the following is not a benefit of geothermal energy?
A. It is a reliable source of energy energy
B. The initial capital investment cost is high
C. It is least polluting as compared to other traditional energy energy sources.
D. It is a renewable energy source
Answer: B
Question 109: PLC functions that generate output signals according to logical operations performed on input signals are known as
A. control relay functions
B. counting functions
C. timing functions
D. arithmetic functions
Answer: A
Question 110: The ratio of energy obtained from a battery while discharging to energy given to the battery while charging is:
A. KW efficiency
B. WH efficiency
C. AH efficiency
D. D/C efficiency
Answer: A
Question 111: Which of the following is a FALSE statement?
A. In a simple brayton cycle, the air is first compressed and then compressed air is heated at constant volume.
B. Gas turbines are steady flow power machines in which a gas is compressed, heated and expanded to generate power.
C. A gas turbine requires less installation time and cost, is quick in starting and stopping, and has fast response to load changes.
D. Brayton cycle consists of two isentropic and two reversible isobaric processes.
Answer: A
Question 112: Which of the following is not one of the most common language structures of PLC programming?
A. Function chart
B. Forward language
C. Ladder diagram
D. Boolean language
Answer: B
Question 113: A 4.0 ampere ammeter has a resistance of 0.01 Ω. Determine the efficiency of the instrument.
A. 1.6 A/W
B. 25.01 A/W
C. 25 A/W
D. 16 A/W
Answer: C
Question 114: ………………………. gate is also called anti-coincidence gate or inequality detector.
A. OR gate
B. X-NOR gate
C. NOR gate
D. X-OR gate
Answer: D
Question 115: The cross-sectional area of a conductor for power wiring should NOT be less than______ for a copper wire and __ for aluminium.
Answer: B
Question 116: One of the most commonly used materials for insulators of an overhead transmission line, i.e. glass, has the drawback (when used as an insulator material) that:
A. its thermal expansion is high
B. material always remains porous
C. moisture condenses more readily on its surface
D. it has low resistivity when properly annealed
Answer: C
Question 117: Which of the following is NOT a method of protection of transmission lines?
A. Fast selective overcurrent protection
B. Distance protection
C. Time graded overcurrent protection
D. Current graded overcurrent protection
Answer: A
Question 118: Which of the following logic families requires maximum power?
A. DCTL
B. CMOS
C. TTL
D. ECL
Answer: D
Questions 119: Which of the following is an advantage of nuclear power plants?
A. The maintenance cost is always low.
B. Its capital cost is always high.
C. Its operation is more reliable.
D. The disposal of fission products is smooth
Answer: C
Question 120: Which of the following is not necessary for testing in air brake switch placement?
A. Earthquake damage
B. Conduction stopped dust accumulation
C. Blade/contact ignition
D. absence of lock
Answer: B
Question 121:
A. existing cable
B. underground cable
C. planned cable
D. overhead line
Answer: D
Question 122: Which of the following are NOT temperature measuring devices?
A. Thermocouples
B. Manometers
C. Radiation pyrometers
D. Semiconductor thermometers
Answer: B
Question 123: Which of the following is one of the categories of core loss in a DC machine?
A. Hysteresis loss
B. Friction loss
C. Loss due to series field winding
D. Windage loss
Answer: A
Question 124: Which of the following is a wrong practice to save energy while working with electric ironing equipment?
A. Do not pour too much water while ironing.
B. Switching the automatic iron on/off, regulating the heat of the cloth as it is ironed.
C. Selecting ironing boxes with automatic temperature cutoff.
D. Do not iron clothes when wet.
Answer: B
Question 125: ………. is not a main component of nuclear power plant.
A. steam generator
B. expansion
C. Nuclear Plant
D. Electric generator
Answer: B