Q.1
The purpose of testing an internal combustion engine is
Q.2
The knocking in spark ignition engines can be reduced by
Q.3
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
Q.4
A 75 cc engine has following parameter as 75 cc
Q.5
Diesel fuel, compared to petrol is
Q.6
An hmh flame speed is obtained in diesel engine when air fuel ratio is
Q.7
A stoichiometric air-fuel ratio is
Q.8
Diesel as compared to petrol is
Q.9
Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads
Q.10
The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed
Q.11
A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
Q.12
The increase in intake temperature of internal combustion engines will _________ efficiency.
Q.13
During idling, a petrol engine requires _________ mixture.
Q.14
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be
Q.15
In a four stroke cycle diesel engine, the inlet valve
Q.16
In a four stroke cycle petrol engine, the inlet valve
Q.17
The cam shaft of a four stroke I.C. engine running at 1500 rpm will run at
Q.18
Fuel oil consumption guarantees for I .C. engine are usually based on
Q.19
The thermal efficiency of diesel engines on weak mixtures is
Q.20
In order to eliminate knocking in compression ignition engines, there should be
Q.21
The normal heptane (C₇H₁₆) is given a rating of ________ octane number.
Q.22
Polymerization is a chemical process in which molecules of a compound become
Q.23
The theoretically correct mixture of air and petrol is
Q.24
In compression ignition engines, swirl denotes a
Q.25
In a four stroke cycle diesel engine, the compression
Q.26
In a four stroke cycle petrol engine, the compression
Q.27
In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then _________ is employed.
Q.28
Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged?
Q.29
The _________ engines can work on very lean mixture of fuel.
Q.30
Iso-octane (C₈H₁₈) has octane number of
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