The actual volume of fresh charge admitted in 4-stroke petrol engine is
The actual volume of fresh charge admitted in 4-stroke petrol engine is
The thermodynamic cycle on which the petrol engine works, is
The thermodynamic cycle on which the petrol engine works, is
Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged?
Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged?
The expansion of fuel in a four stroke cycle diesel engine
The expansion of fuel in a four stroke cycle diesel engine
The ratio of the brake power to the indicated power is called
The ratio of the brake power to the indicated power is called
In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have
In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have
In a typical medium speed, 4-stroke cycle diesel engine
In a typical medium speed, 4-stroke cycle diesel engine
The reason for supercharging in any engine is to
The reason for supercharging in any engine is to
The exhaust valve in a four stroke cycle petrol engine
The exhaust valve in a four stroke cycle petrol engine
Number of working strokes per min. for a two stroke cycle engine is _________ the speed of the engine in r.p.m.
Number of working strokes per min. for a two stroke cycle engine is _________ the speed of the engine in r.p.m.
For the same power developed in I.C. engines, the cheaper system is
For the same power developed in I.C. engines, the cheaper system is
In a four stroke cycle petrol engine, the inlet valve
In a four stroke cycle petrol engine, the inlet valve
If petrol is used in a diesel engine, then
If petrol is used in a diesel engine, then
During idling, a petrol engine requires _________ mixture.
During idling, a petrol engine requires _________ mixture.
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
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
The fuel in diesel engine is normally injected at pressure of
The fuel in diesel engine is normally injected at pressure of
The cetane (C₁₆H₃₄) which is a straight chain paraffin, is assigned a cetane number of
The cetane (C₁₆H₃₄) which is a straight chain paraffin, is assigned a cetane number of
The increase in intake temperature of internal combustion engines will _________ efficiency.
The increase in intake temperature of internal combustion engines will _________ efficiency.
Number of working strokes per min. for a four stroke cycle engine are _________ the speed of the engine in r.p.m.
Number of working strokes per min. for a four stroke cycle engine are _________ the speed of the engine in r.p.m.
The cam shaft of a four stroke I.C. engine running at 1500 rpm will run at
The cam shaft of a four stroke I.C. engine running at 1500 rpm will run at
The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called
The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called
Which of the following statement is correct?
Which of the following statement is correct?
The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of
The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of
The size of inlet valve of an engine in comparison to exhaust valve is
The size of inlet valve of an engine in comparison to exhaust valve is
The brake power is the power available
The brake power is the power available
The fuel valve in a four stroke cycle diesel engine
The fuel valve in a four stroke cycle diesel engine
The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed
The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed
The calorific value of gaseous fuels is expressed in terms of
The calorific value of gaseous fuels is expressed in terms of
In loop scavenging, the top of the piston is
In loop scavenging, the top of the piston is
The scavenging efficiency of a four stroke cycle diesel engine is
The scavenging efficiency of a four stroke cycle diesel engine is
The specific fuel consumption per BH hour for a petrol engine is approximately
The specific fuel consumption per BH hour for a petrol engine is approximately
The pressure and temperature at the end of compression stroke in a petrol engine are of the order of
The pressure and temperature at the end of compression stroke in a petrol engine are of the order of
Scavenging is usually done to increase
Scavenging is usually done to increase
The air standard efficiency of an I.C. engine depends on
The air standard efficiency of an I.C. engine depends on
The maximum propulsive efficiency of a turbojet engine is at a speed of
The maximum propulsive efficiency of a turbojet engine is at a speed of
The air-fuel ratio of the petrol engine is controlled by
The air-fuel ratio of the petrol engine is controlled by
Air fuel ratio for idling speed of a petrol engine is approximately
Air fuel ratio for idling speed of a petrol engine is approximately
The turbine of the turboprop engine is __________ that of the turbojet engine.
The turbine of the turboprop engine is __________ that of the turbojet engine.
A diesel engine has
A diesel engine has
Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of
Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of
An hmh flame speed is obtained in diesel engine when air fuel ratio is
An hmh flame speed is obtained in diesel engine when air fuel ratio is
The output of a diesel engine can be increased without increasing the engine revolution or size in following way
The output of a diesel engine can be increased without increasing the engine revolution or size in following way
The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is
The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is
When crude oil is heated, then which of the following hydrocarbon is given off first?
When crude oil is heated, then which of the following hydrocarbon is given off first?
The specific fuel consumption per BHP hour for diesel engine is approximately
The specific fuel consumption per BHP hour for diesel engine is approximately
The pressure at the end of compression, in petrol engines, is approximately
The pressure at the end of compression, in petrol engines, is approximately
Which of the following statement is wrong?
Which of the following statement is wrong?
In a typical medium speed 4-stroke cycle diesel engine the inlet valve
In a typical medium speed 4-stroke cycle diesel engine the inlet valve
Which one of the following engines will have heavier flywheel than the remaining ones?
Which one of the following engines will have heavier flywheel than the remaining ones?
In a four stroke cycle engine, the sequence of operations is
In a four stroke cycle engine, the sequence of operations is
The thermal efficiency of diesel engines is about
The thermal efficiency of diesel engines is about
For the same compression ratio
For the same compression ratio
Which of the following does not relate to a compression ignition engine?
Which of the following does not relate to a compression ignition engine?
Morse test can be conducted for
Morse test can be conducted for
Polymerization is a chemical process in which molecules of a compound become
Polymerization is a chemical process in which molecules of a compound become
Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?
Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?
A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is
A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is
Fuel oil consumption guarantees for I .C. engine are usually based on
Fuel oil consumption guarantees for I .C. engine are usually based on
In a four stroke cycle diesel engine, the compression
In a four stroke cycle diesel engine, the compression
In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then _________ is employed.
In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then _________ is employed.
Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads
Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads
Which of the following medium is compressed in a Diesel engine cylinder?
Which of the following medium is compressed in a Diesel engine cylinder?
The pressure at the end of compression, in diesel engines, is approximately
The pressure at the end of compression, in diesel engines, is approximately
Diesel fuel, compared to petrol is
Diesel fuel, compared to petrol is
The two reference fuels used for cetane rating are
The two reference fuels used for cetane rating are
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be
The magneto in an automobile is basically
The magneto in an automobile is basically
In order to eliminate knocking in compression ignition engines, there should be
In order to eliminate knocking in compression ignition engines, there should be
In a typical medium speed 4-stroke cycle diesel engine
In a typical medium speed 4-stroke cycle diesel engine
The knocking in spark ignition engines can be reduced by
The knocking in spark ignition engines can be reduced by
As compared to air standard cycle, in actual working, the effect of variation in specific heats is to
As compared to air standard cycle, in actual working, the effect of variation in specific heats is to
A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
Diesel as compared to petrol is
Diesel as compared to petrol is
The thermal efficiency of petrol and gas engines is about
The thermal efficiency of petrol and gas engines is about
The inlet valve of a four stroke cycle internal combustion engine remains open for
The inlet valve of a four stroke cycle internal combustion engine remains open for
The thermal efficiency of diesel engines on weak mixtures is
The thermal efficiency of diesel engines on weak mixtures is
A petrol engine has compression ratio from
A petrol engine has compression ratio from
Which of the following does not relate to a spark ignition engine?
Which of the following does not relate to a spark ignition engine?
The air-fuel ratio in petrol engines is controlled by
The air-fuel ratio in petrol engines is controlled by
Scavenging air in diesel engine means
Scavenging air in diesel engine means
A 75 cc engine has following parameter as 75 cc
A 75 cc engine has following parameter as 75 cc
The _________ engines can work on very lean mixture of fuel.
The _________ engines can work on very lean mixture of fuel.
A spark plug gap is kept from
A spark plug gap is kept from
Which of the following statement is wrong?
Which of the following statement is wrong?
Pick up the wrong statement
Pick up the wrong statement
Pick up the false statement
Pick up the false statement
A stoichiometric air-fuel ratio is
A stoichiometric air-fuel ratio is
A diesel engine has compression ratio from
A diesel engine has compression ratio from
In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the
In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the
The normal heptane (C₇H₁₆) is given a rating of ________ octane number.
The normal heptane (C₇H₁₆) is given a rating of ________ octane number.
The purpose of testing an internal combustion engine is
The purpose of testing an internal combustion engine is
In a four stroke cycle petrol engine, the compression
In a four stroke cycle petrol engine, the compression
The self ignition temperature of petrol is _________ as compared to diesel oil.
The self ignition temperature of petrol is _________ as compared to diesel oil.
In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to
In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to
In compression ignition engines, swirl denotes a
In compression ignition engines, swirl denotes a
The pressure inside the cylinder is _________ the atmospheric pressure during the exhaust stroke.
The pressure inside the cylinder is _________ the atmospheric pressure during the exhaust stroke.
The theoretically correct mixture of air and petrol is
The theoretically correct mixture of air and petrol is
In a four stroke cycle diesel engine, the inlet valve
In a four stroke cycle diesel engine, the inlet valve
Iso-octane (C₈H₁₈) has octane number of
Iso-octane (C₈H₁₈) has octane number of
Engine pistons are usually made of aluminium alloy because it
Engine pistons are usually made of aluminium alloy because it
