Q.1
A safety valve mainly used with locomotive and marine boilers is
Q.2
Which of the following substance will have same percentage in both proximate and ultimate analysis?
Q.3
The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is
Q.4
Coke is produced by
Q.5
A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly
Q.6
An economiser is generally placed between
Q.7
All steam engines work on
Q.8
The flow through a nozzle is regarded as
Q.9
The efficiency of a boiler is defined as
Q.10
A valve installed between the boiler and the feed pump is
Q.11
Thermal efficiency of well maintained boiler will be of the order
Q.12
The amount of water evaporated in kg per kg of fuel burnt is called
Q.13
The maximum steam pressure in a Locomotive boiler is limited to
Q.14
The friction present between the steam and the nozzle surfaces reduces the heat drop by
Q.15
Pick up the correct statement as regards Cornish boiler and Lancashire boiler
Q.16
The maximum heat loss is a boiler occurs due to
Q.17
In a boiler, the heat is lost
Q.18
Duplex feed pumps are used in small steam boilers. These operate on the principle of
Q.19
The reheat factor is the ratio of the
Q.20
The critical pressure ratio for gases is
Q.21
The temperature of flue gases at air heater outlet should be
Q.22
Water and sediment in fuel oil can be removed by
Q.23
Superheating of steam is done at
Q.24
The action of steam in a steam turbine is
Q.25
The best suited coal for chain or traveling grate stoker boiler is
Q.26
The principal function of a stop valve is to
Q.27
Which is not correct statement about effect of sulphur in fuel?
Q.28
In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be
Q.29
A compound steam engine in which piston rods of high pressure and low pressure cylinders are attached to two different cranks set at 90° to each other, is called
Q.30
In a reaction turbine
0 h : 0 m : 1 s