30 câu hỏi
The firing order in case of four cylinder inline engines is usually ________
1-2-4-3
1-3-4-2
1-4-3-2
Either 1-3-4-2 or 1-4-3-2
In case of four cylinder opposed cylinder engines the firing order is ___________
1-4-3-2
1-3-4-2
1-2-3-4
1-2-4-3
In case of four cylinder inline engine the number of firing strokes in one revolution of crank is _______
1
2
3
4
In four cylinder engines the ignition advance depends on _________
Quality of fuel
Engine speed
Cylinder dimensions
Quality of fuel and engine speed
Ignition advance is expressed in terms of _________
Crank angle
Millimetres of piston travel before TDC
Time in milli seconds
All of the mentioned
Sir Rudolf Diesel invented diesel engine in which year?
1905
1916
1920
1913
In internal combustion engine the approximate percentage of the combustion heat that passes to the cylinder walls is _________
5%
10%
30%
60%
In a four stroke S.I engine the exhaust valve usually opens ______
At BDC
35 degree to 60 degree before BDC
35 degree to 60 degree after BDC
10 degree to 20 degree before BDC
In a diesel engine the pressure during combustion may increase to a range at _________
10-15 atm
15-20 atm
20-30 atm
55-75 atm
The pressure in an engine cylinder is less than atmospheric pressure when the engine is performing which stroke?
Suction
Compression
Power
Exhaust
Kinds of mechanical properties
Strength
Corrosion
Formed
All correct
Kinds of physical properties
Density
Oxidation
Casting
All correct
Kinds of chemical properties
Corrosion
Oxidation
Density
A & B
Kinds of manufacturing properties?
Machined
Formed
Casting
All correct
Types of engineering materials
2
3
4
5
Find suitable words with phrase “Formed by mixing other metals or elements”
An alloy
An metal
An insulator
A conductor
Find suitable words with phrase “Allows heat or current to flow easily”
A conductor
An metal
An insulator
An alloy
Find suitable words with phrase “Does not allow heat or current to flow easily”
A conductor
An metal
An alloy
An insulator
The bulk of hydrocarbon belongs to which group?
Paraffin
Isoparaffin
Cycloparaffin
Aromatic
Which of these is not a lighter fraction of fuel oil?
Gasoline
Aviation fuel
Heavy diesel oil
Boiler fuel
Which of the following type of fuel does not contain ash?
Coal
Fuel oil
Natural gas
Synthetic fuels
Which of these gases is the reason for the maintenance of natural gas at cryogenic temperatures?
Methane
Ethane
Propane
Benzene
The gas which contributes maximum to heating value of natural gas is?
CO
CO₂
H₂
CH₄
A coal containing high percentage of durian is called _________
Splint
Bright
Boghead
Non-banded
Which types of wheels cannot be used with a tubeless tire?
Disc wheel
Light alloy wheel
Wire wheel
Composite wheel
Which type of wheels is preferred in sports cars?
Disc wheel
Wire wheel
Magnesium alloy wheel
Aluminum alloy wheel
In case of a wire wheel, the vehicle weight is supported by the wire in _________
Tension
Bending
Shear
Compression
Where will an underinflated tire wear the thread most?
Near center
Near the edge
In the cross direction
In the lateral direction
Where will an overinflated tire wear the thread most?
Near center
Near the edge
In the cross direction
In the lateral direction
What do the permissible of mixing cross-ply and radial-ply automobile tires allow?
Cross-ply tires on left wheels
Cross-ply tires on right wheels
Cross-ply tires on front wheels
Cross-ply tires on rear wheels