A. iso-octane
B. mixture of normal heptane and iso-oc-tane
C. alpha methyl napthalene
D. mixture of methane and ethane
E. mixture of paraffins and aromatics
Related Mcqs:
- Cetane number is determined by comparing the performance of diesel oil with the following hydrocarbons___________________?
A. cetane
B. mixture of cetane and alphamethyl napthalene
C. ethylene dibromide
D. mixture of aldehydes and ketones
E. mixture of cetane with tetra-ethyl lead - In petrol engine using a fixed octane rating fuel and fixed compression ratio, super charging will_________________?
A. increase the knocking tendency
B. decrease the knocking tendency
C. not affect the knocking tendency
D. increase or decrease knocking tendency depending on strength and time of spark
E. unpredictable - The thermal efficiency of a petrol engine of two stroke with crank case scavenging as compared to four stroke petrol engine with same comperssion ratio will be_____________________?
A. higher
B. lower
C. same
D. depends on size of engine
E. unpredictable. - Ignition quailty of petrol is expressed by___________________?
A. octane number
B. cetane number
C. calorific value
D. self ignition temperature
E. distillation temperature - Self-ignition temperature of petrol is of the order of___________________?
A. 150°C
B. 240°C
C. 370°C
D. 450°C
E. more than 500°C. - The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The M.E.P is maximum in the zone of________________?
A. lean mixture
B. chemically correct mixture
C. rich mixture
D. unpredictable
E. none of the above - Ignition timing of a multicylider petrol engine can be adjusted by_________________?
A. rotating the crank
B. adjusting the spark plug gap
C. adjusting ignition coil position
D. rotating the distributor
E. delaying the spark by increasing capacitor in ignition circuit - If diesel is fed by mistake in the oil tank of a petrol engien, then engine will________________?
A. give lot of smoke
B. detonate
C. knock
D. not run
E. run for some time and then stop - The termal efficiency of a petrol engine at design load is around_________________?
A. 90%
B. 50%
C. 40%
D. 30%
E. 15%. - Deposition of carbon in petrol engine cylinder would result in increase of__________________?
A. clearance volume
B. swept volume
C. compression ratio
D. volumetric efficiency
E. mean effective pressure
