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WorksheetsBME - I.C. ENGINE - COMPUTER ENGINEERING
Total questions: 47
Worksheet time: 3hrs 35mins
Name
Class
Date
1.
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)
Double
b)
Half
c)
equal
d)
None of the above
2.
A four stroke cycle engine gives......the number of power strokes as compared to the two stroke cycle engine,at the same engine speed
a)
Double
b)
Half
c)
equal
d)
None of the above
3.
In a four stroke engine,the working cycle is completed in.......
a)
one revolution of the crankshaft
b)
Two revolution of the crankshaft
c)
Three revolution of the crankshaft
d)
Four revolution of the crankshaft
4.
In a two stroke engine,the working cycle is completed in.......
a)
one revolution of the crankshaft
b)
Two revolution of the crankshaft
c)
Three revolution of the crankshaft
d)
Four revolution of the crankshaft
5.
The calorific value of fuels is expressed in terms of.....
a)
KJ/kg
b)
cubic meter
c)
square meter
d)
kg
6.
The thermodynamic cycle in which Petroll engine works,is......
a)
Diesel cycle
b)
Carnot cycle
c)
Otto cycle
d)
Rankine cycle
7.
The thermodynamic cycle in which Diesel engine works,is......
a)
Diesel cycle
b)
Carnot cycle
c)
Otto cycle
d)
Rankine cycle
8.
Which of the following does not relate with spark ignition engine......
a)
Ignition coil
b)
Spark plug
c)
Distributor
d)
Fuel injector
9.
The power developed by the engine cylinder of an I.C. engine is known as.......
a)
Simple power
b)
Brake power
c)
Indicated power
d)
Friction power
10.
Power developed by the engine crank shaft of an I.C. engine is known as.......
a)
Simple power
b)
Brake power
c)
Indicated power
d)
Friction power
11.
The thermal efficiency of petrol engine is around.....
a)
0.15
b)
0.3
c)
0.5
d)
0.7
12.
The volumetric efficiency of a well designed engine may be.....
a)
30% to 40%
b)
40% to 60%
c)
60% to 70%
d)
75% to 90%
13.
The brake power of an engine is always......the indicated power
a)
Less than
b)
Greater than
c)
Equal
d)
None of the above
14.
The indicated power of an engine is always......the brake power
a)
Less than
b)
Greater than
c)
Equal
d)
None of the above
15.
If the speed of the engine is increased,the indicated power will.......
a)
Increase
b)
Decrease
c)
Remain same
d)
None of the above
16.
Indicated power of a 4-stroke engine is equal to (p=effective pressure,L=stroke,A=area of piston,n=No of power stroke in r.p.m).....
a)
pLAn / 60 Watt
b)
pL / An Watt
c)
p / LAn Watt
d)
pn / AL Watt
17.
Which of the following is not an internal combustion engine.......
a)
2 stroke petrol engine
b)
4 stroke petrol engine
c)
Diesel engine
d)
Steam turbine
18.
The brake specific fuel consumption(BSFC) for IC Engine is expressed in terms of
a)
Kg/KW hr
b)
W/Kg
c)
hr/Kg
d)
hr/KW
19.
The process of sweeping out the burnt gases by the fresh incoming charge .
a)
Scavenging
b)
Sweeping
c)
Mixing
d)
Diluting
20.
The air fuel ratio of the petrol engine is controlled by…
a)
Carburetter
b)
Spark plug
c)
Fuel tank
d)
Fuel pump
21.
Diesel Engine is also known as
a)
Compression Ignition Engine(CI Engine)
b)
Spark Ignition Engines(SI Engines)
c)
Both
d)
None
22.
Petrol Engine is also known as
a)
Compression Ignition Engine(CI Engine)
b)
Spark Ignition Engines(SI Engines)
c)
Both
d)
None
23.
The relation between Indicated power (ip), Friction power (fp) and Brake power (bp) is
a)
ip = fp – bp
b)
ip = fp + bp
c)
bp = ip + fp
d)
bp = ip / fp
24.
The compression ratio in a Spark Ignition (SI) engine is generally in between
a)
7 to 10
b)
10 to 14
c)
14 to 18
d)
18 to 22
25.
The compression ratio in a Compression Ignition (CI) engine is generally in between
a)
8 to 13
b)
14 to 23
c)
20 to 28
d)
25 to 32
26.
Heat engine uses ______ energy to produce mechanical work.
a)
Thermal
b)
Fluid
c)
Kinetic
d)
Electric
27.
The energy of expanding gas is transferred by piston to connecting rod through
a)
Crank pin
b)
Gudgeon pin
c)
Bearing
d)
Crankcase
28.
Which of the following is not used in four stroke compression-ignition (CI) engines?
a)
Fuel pump
b)
Spark plug
c)
Fuel injector
d)
Inlet and outlet Valves
29.
In compression ignition (CI) engine, the compression ratio is
a)
Cylinder volume / Clearance volume
b)
Swept Volume / Cylinder Volume
c)
Clearance volume / Cylinder volume
d)
Cylinder volume / Swept volume
30.
In two stroke engine there is one power stroke in _____ of crankshaft rotation.
a)
90°
b)
180°
c)
270°
d)
360°
31.
In four stroke engine there is one power stroke in _____ of crankshaft rotation.
a)
180°
b)
540°
c)
360°
d)
720°
32.
The ascending order of strokes in four stroke engine is
a)
Suction stroke – Expansion stroke – Compression stroke – Exhaust stroke
b)
Suction stroke – Compression stroke – Expansion stroke –Exhaust stroke
c)
Suction stroke – Expansion stroke – Exhaust stroke – Compression stroke
d)
Suction stroke – Compression stroke – Exhaust stroke – Expansion stroke
33.
In four stroke engine which of the following is also known as power stroke
a)
Suction stroke
b)
Compression stroke
c)
Expansion stroke
d)
Exhaust stroke
34.
If Indicated Power is 42 KW, Friction Power is 7 KW then Brake Power is equal to
a)
49 KW
b)
35 KW
c)
294 KW
d)
6 KW
35.
If Indicated Power is 42 KW, Friction Power is 7 KW then Mechanical Efficiency is equal to
a)
0.7
b)
0.8333
c)
0.93
d)
0.35
36.
If Indicated Power is 35 KW,Mass of fuel used is 10 Kg/hr and Calorific Value of Fuel used is 42000 KJ/Kg then Thermal Efficiency is equal to
a)
0.25
b)
0.3
c)
0.35
d)
0.4
37.
if Braking Torque is 836 Nm , Engine speed is 400 rpm then Brake power is given by (in KW)
a)
35
b)
40
c)
42
d)
50
38.
In a diesel engine,the fuel is injected by.......
a)
Spark plug
b)
Fuel injector
c)
Carburettor
d)
Syringe
39.
A carburettor is used to supply........
a)
Petrol and air
b)
Diesel and air
c)
Air
d)
Petrol
40.
Determne indicated power of a 4-stroke engine if p=effective pressure=50 N/m2 ,L=stroke=180 mm,A=area of piston= 500 m2 ,n=No of power stroke per minute=400).....
a)
10 KW
b)
20 KW
c)
30 KW
d)
40 KW
41.
Determne indicated power of a 2-stroke engine if p=effective pressure=50 N/m2 ,L=stroke=180 mm,A=area of piston= 500 m2 ,N=Engine speed in r.p.m=400).....
a)
10 KW
b)
20 KW
c)
30 KW
d)
40 KW
42.
A petrol engine, during suction stroke draws
a)
air only
b)
petrol only
c)
a mixture of petrol and air
d)
none of the mentioned
43.
A diesel engine, during suction stroke draws
a)
air only
b)
petrol only
c)
a mixture of petrol and air
d)
diesel
44.
In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then ____________ is employed.
a)
fuel pump
b)
fuel injector
c)
carburettor
d)
spark plug
45.
Mechanical Efficiency is defined as(ip= Indicated Power, bp = Brake Power)
a)
ip + bp
b)
ip - bp
c)
ip / bp
d)
bp / ip
46.
BSFC(Brake Specific Fuel Consumption) is given as(mf=mass of fuel used,bp = Brake Power)
a)
mf + bp
b)
mf - bp
c)
bp / mf
d)
mf / bp
47.
The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called..?
a)
Relative efficiency
b)
Volumetric efficiency
c)
Break thermal efficiency
d)
None of the these
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