- (A) fuelinjection starts at 10° before to dead center and ends at 20° after tor dead center
- (B) fuel injection starts at top dead center and ends at 20° after top dead center
- (C) fuel injection starts at just before top dead center and ends just after top deac center
- (D) may start and end anywhere
- (E) none of the above
Mechanical Engineering Mcqs
- (A) air aione
- (B) air and fuel
- (C) air and lub oil
- (D) fuel alone
- (E) air, fuel and lub oil
- (A) peak pressure
- (B) rate of rise of pressure
- (C) rate of rise of temperature
- (D) peak temperature
- (E) rate of rise of horse-power
- (A) Diesel cycle
- (B) Otto cycle
- (C) Dual combustion cycle
- (D) Special type of air cycle
- (E) Carnot cycle
- (A) Otto cycle is more efficient than the Diesel
- (B) Diesel cycle is more efficient’than Otto
- (C) both Otto and Diesel cycles are, equally efficient
- (D) compression ratio has nothing to do with efficiency
- (E) which is more efficient would depend on engine capacity
- (A) increase
- (B) decrease
- (C) remain same
- (D) increase upto certain limit and then decrease
- (E) decrease upto certain limit and then in-crease
- (A) exhaust will be smoky
- (B) piston rings would stick into piston grooves
- (C) exhaust temperature will be high
- (D) engine starts overheating
- (E) scavenging occurs
- (A) minimum temperature to which1 oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
- (B) temperature at which it solidifies or congeals
- (C) temperature at which it catches fire without external aid
- (D) indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off
- (E) none of the above
- (A) scavenging
- (B) turbulence
- (C) supercharging
- (D) pre-ignition
- (E) dissociation and carburretion of fuel
- (A) using additives in the fuel
- (B) engine derating i.e. reducing the maxi-mum flow of fuel
- (C) increasing the compression ratio
- (D) adherence to proper fuel specification
- (E) avoidance of overloading
