11) Time loss factor in actual cycle is due to
a) progressive combustion
b) heat loss through cylinder walls
c) gas leakage
d) friction
12)In case of gas turbines, the gaseous fuel consumption guarantees are based on
(a) high heat value
(b) low heat value
(c) net calorific value
(d) middle heat value
(e) calorific value.
13) Which of the following methanol composition has no methanol ?
a) M 0
b) M 15
c) M 85
c) M 100
14) When crude oil is heated, then which one of the following hydrocarbon is given off first ?
a) Gasoline
b) Paraffin
c) Diesel
d) Natural gas
15) The major constituent of natural gas
a) butane
b) ethane
c) methane
d) propane
16) Stoichiometric air-fuel ratio of petrol is roughly
a) 50 : 1
b) 25 : 1
c) 15 : 1
d) 11 : 1
17) For SI engines fuels most preferred are
a) Aromatics
b) Paraffins
c) Olefins
d) Nepthenes
18) Octane number of Iso-octane is
a) 0
b) 30
c) 60
d) 100
19) The most preferred type of carburetor is
a) concentric
b) eccentric
c) horizontal
d) vertical
20) The air-fuel ratio of the petrol engine is controlled by
a) fuel pump
b) carburetter
c) governor
d) scavenging