Certificate In EV Charging Station /30 0 Your Examination is Complete ! Certificate In EV Charging StationOnline Examination Detail: Duration- 60 minutes. Number of Questions- 30. (Multiple Choice Questions). Maximum Marks- 100, Passing Marks- 40%. There is no negative marking. Candidate Details NameEmailPhone Number 1 / 301. In two-stroke cycle engines, what replaces valves of a four-stroke engine? A. Fins B. Notches C. Ports D. Tubes 2 / 302. Which of these is a power absorbing heat engine? A. Steam engine B. Petrol engine C. Air compressor D. None of the mentioned 3 / 303. The expansion process in diesel engine is ________ A. Isothermal B. Adiabatic C. Isobaric D. None of the mentioned 4 / 304. A gas undergoes step 4 in Carnot cycle. Which of these processes describes the 2nd step? A. Isentropic expansion B. Isentropic compression C. Isothermal expansion D. Isothermal compression 5 / 305. If the lead-acid cell has a total of 17 cells, then what is the number of positive plates? A. 9 B. 8 C. 7 D. 6 6 / 306. Why is a thermistor used in an alternator regulator? A. To control maximum current B. To control maximum voltage C. To compensate for temperature change D. To control minimum current 7 / 307. In an alternator, which component controls the output? A. Voltage regulator B. Cutout relay C. Current regulator D. Diode 8 / 308. Field coils in a generator produce permanent magnet. A. True B. False 9 / 309. Thermal power plants operate on which of these cycles? A. Otto cycle B. Rankine cycle C. Carnot cycle D. Stirling cycle 10 / 3010. A steam engine comes under the category of ________ A. External combustion engines B. Internal combustion engines C. All of the mentioned D. None of the mentioned 11 / 3011. What is the material of an alternator frame? A. Cast iron B. Brass C. Copper D. Aluminum 12 / 3012. A gas undergoes isothermal compression in Carnot cycle. Which step does it undergo? A. 1st B. 2nd C. 3rd D. 4th 13 / 3013. What is the frequency of a vibrating contact type regulator for DC generator? A. 20 per second B. 200 per second C. 200 per minute D. 20 per minute 14 / 3014. A heat engine converts heat energy from fuel combustion or any other source into which type of work? A. Electrical work B. Mechanical work C. Pressure work D. None of the mentioned 15 / 3015. In a Diesel cycle engine, combustion occurs at _________ A. Constant pressure B. Constant temperature C. Constant volume D. Constant heat 16 / 3016. Heat rejection in diesel cycle is at _________ A. Constant pressure B. Constant volume C. Constant temperature D. None of the mentioned 17 / 3017. The valves of an ic engine are made to open and close slowly to _________ A. Increase the engine efficiency B. Decrease the fuel consumption C. Allow engine to cool in the meantime D. Provide silent operation under high speed conditions 18 / 3018. Which of these is a type of reciprocating steam engine? A. Simple B. Compound C. Uniflow D. All of the mentioned 19 / 3019. Which of these is not an assumption made in deriving the formula for air standard of Otto cycle? A. There is no heat loss during the cycle B. The compression and expansion are isothermal C. The heating and cooling strictly take place at constant volume D. The suction and exhaust take place at atmospheric pressure 20 / 3020. At the start of the engine, the charging voltage is _______ A. Lower B. Higher C. Same D. Zero 21 / 3021. Which component in the DC generator produces a magnetic field? A. Stator B. Commutator C. Armature D. Carbon brushes 22 / 3022. Which of the following is not an advantage of the alternator? A. Higher output B. Lower weight C. Less maintenance D. High efficiency 23 / 3023. In a four stroke ic engine, how many strokes are covered for one complete crankshaft revolution? A. 4 B. 2 C. 1 D. 0.5 24 / 3024. Which component in alternator produces a magnetic field? A. Frame B. Stator C. Regulator D. Rotor 25 / 3025. In a 4-stroke ic engine, which of the strokes is considered as working or power stroke? A. Suction stroke B. Compression stroke C. Expansion stroke D. Exhaust stroke 26 / 3026. Higher efficiency in Otto cycle can be achieved by _______ A. Increasing the compression ratio B. Decreasing the compression ratio C. Keeping the compression ratio constant D. Efficiency does not depend on compression ratio 27 / 3027. A gas undergoes step 2 in Carnot cycle. Which of these processes describes the 2nd step? A. Isentropic expansion B. Isentropic compression C. Isothermal expansion D. Isothermal compression 28 / 3028. The efficiency of a combined cycle gas turbine(steam cooled) can range as high as ________ A. 20% B. 30% C. 40% D. 60% 29 / 3029. In a Otto cycle engine, combustion occurs at __________ A. Constant pressure B. Constant temperature C. Constant volume D. Constant heat 30 / 3030. One ‘ton of refrigeration’ equals how much Btu/hr. A. 14,500 Btu/hr B. 12,000 Btu/hr C. 13,000 Btu/hr D. 15,000 Btu/hr Exit