Users Also Read
Read MCQ's/Objective questions
MCQ's Search Engine
Compressors,Gas Turbine & Jet Engn
Engineering Materials
Engineering Mechanics
Heat Transfer
Machine Design
Nuclear Power Plants
Hydraulic Machines, Fluid Mechanics
Hydraulic Machines
Fluid Mechanics
Process Instrumentation and Control
Production & Industrial Engg Mngment
Production Technology
Refrigeration and Air Conditioning
Steam Boiler,Engine,Nozzle & Turbine
Strength of Materials
Theory of Machines
Thermodynamics
Workshop Technology
Applied Mechanics
Automobile Engineering
General Engineering
Engineering Methodology / Meterology
Home⇒ Engineering⇒
Internal combustion engine
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ The reason for supercharging in any engine is to. reduce weight and bulk for a given out-put [other wrong options] [Discuss in forum] increase efficiency increase powe effect fuel economy |
Q22 ⇒ Volatility of diesel fuel oil is. indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off [other wrong options] [Discuss in forum] minimum temperature to which oil is heated in order to give off inflam¬mable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame temperature at which it solidifies or congeals it catches fire without external aid |
Q23 ⇒ Supercharging is the process of supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere [other wrong options] [Discuss in forum] providing forced cooling air injecting excess fuel for raising more load supplying compressed air to remove combustion products fully raising exhaust pressure. |
Q24 ⇒ Scavenging is usually done to increase. power output [other wrong options] [Discuss in forum] thermal efficiency speed fuel consumption |
Q25 ⇒ Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged ? no [other wrong options] [Discuss in forum] yes to some extent unpredictable depends on other factors. |
Q26 ⇒ Diesel engine can work on very lean air fuel ratio of the order of 30 : 1. A petrol engine can also work on such a lean ratio provided. can not work as it is impossible [other wrong options] [Discuss in forum] it is properly designed best quality fuel is used flywheel size is proper |
Q27 ⇒ The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called relative efficiency [other wrong options] [Discuss in forum] net efficiency efficiency ratio overall efficiency cycle efficiency. |
Q28 ⇒ In a naturally aspirated diesel engine, the air is supplied by. a vacuum chamber [other wrong options] [Discuss in forum] a supercharger a centrifugal blower an injection tube |
Q29 ⇒ Compression ratio of LC. engines is the ratio of volumes of air in cylinder before compression stroke and after compression stroke [other wrong options] [Discuss in forum] volume displaced by piston per stroke and clearance volume in cylinder ratio of pressure after compression and before compression swept volume/cylinder volume cylinder volume/swept volume. |
Q30 ⇒ The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is more [other wrong options] [Discuss in forum] same less more or less depending on power rating unpredictable. |
Q31 ⇒ Supercharging is the process of. supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere [other wrong options] [Discuss in forum] providing forced cooling air injecting excess fuel for raising more load supplying compressed air to remove combustion products fully |
Q32 ⇒ The calorific value of gaseous fuels is expressed in terms of kcal/n? [other wrong options] [Discuss in forum] kcal kcal/kg kcal/m2 all of the above. |
Q33 ⇒ Fuel oil consumption guarantees for I .C. engine are usually based on. high heat value of oil [other wrong options] [Discuss in forum] low heat value of oil net calorific value of oil calorific value of fuel |
Q34 ⇒ If the intake air temperature of I.C. engine increases, its efficiency will decrease [other wrong options] [Discuss in forum] increase remain same unpredictable depend on other factors. |
Q35 ⇒ Combustion in compression ignition engines is. heterogeneous [other wrong options] [Discuss in forum] homogeneous both (a) and (b) laminar |
Q36 ⇒ All heat engines utilize low heat value of oil [other wrong options] [Discuss in forum] high heat value of oil net claorific value of oil calorific value of fuel all of the above. |
Q37 ⇒ Which of the following is not an interna combustion engine. steams turbine. [other wrong options] [Discuss in forum] 2-stroke petrol engine 4-stroke petrol engine diesel engine |
Q38 ⇒ An engine indicator is used to determine the following m.e.p. and I.H.P. [other wrong options] [Discuss in forum] speed temperature volume of cylinder BHP. |
Q39 ⇒ Which of the following statements is correct? All reversible engines working between same temperature limits have same-ef-ficiency [other wrong options] [Discuss in forum] All the irreversible engines have same efficiency All the reversible engines have same efficiency Both Rankine and Caront cycles have same efficiency between same tempera¬ture limits |
Q40 ⇒ Fuel oil consumption guarantees for I .C. engine are usually based on high heat value of oil [other wrong options] [Discuss in forum] low heat value of oil net calorific value of oil calorific value of fuel all of the above. |
Or |