Q.1

A condenser where circulating water flows through tubes which are surrounded by steam, in known as

  • surface condenser
  • jet condenser
  • barometric condenser
  • evaporative condenser
Q.2

The ratio of heat equivalent to brake power to the energy supplied in steam is known as

  • mechanical efficiency
  • overall efficiency
  • indicated thermal efficiency
  • brake thermal efficiency
Q.3

Which of the following statement indicates the difference between Cornish boiler and Lancashire boiler ?

  • Cornish boiler is a water tube boiler whereas Lancashire boiler is a fire tube boiler.
  • Cornish boiler is a fire tube boiler whereas Lancashire boiler is a water tube boiler.
  • Cornish boiler has one flue tube whereas Lancashire boiler has two flue tubes.
  • Cornish boiler has two flue tubes whereas Lancashire boiler has one flue tube.
Q.4

A condenser where circulating water flows through tubes which are surrounded by steam, in known as

  • surface condenser
  • jet condenser
  • barometric condenser
  • evaporative condenser
Q.5

In a single acting steam engine

  • the steam is admitted on one side of the piston and one working stroke is produced during each revolution of the crankshaft
  • the steam is admitted, in turn, on both sides of the piston and one working stroke is produced during each revolution of the crankshaft
  • the steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft
  • the steam is admitted, in turn, on both sides of the piston and two working strokes are produced during each revolution of the crankshaft.
Q.6

Expansion ratio is the ratio of

  • swept volume to the volume at cut-off
  • clearance volume to the swept volume
  • volume at cut-off to the swept volume
  • swept volume to the clearance volume
Q.7

When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by

  • none of these
Q.8

The capacity and working pressure.of a Cornish boiler is __________ as compared to Lancashire boiler.

  • low
  • high
Q.9

Combustuion of fuel takes place __________ the engine cylinder of a steam engine.

  • outside
  • inside
Q.10

When the speed of the engine is controlled by means of a valve in a steam pipe, which regulates the pressure of steam entering the engine, then the governing is known as

  • throttle governing
  • cut-off governing
  • by-pass governing
  • none of these
Q.11

The length of Lancashire boiler varies from

  • 5 to 6 m
  • 6 to 7 m
  • 7.25 to 9 m
  • 9 to 10 m
Q.12

By compounding the expansion of steam in two or more cylinders, the ratio of expansion

  • does not change
  • increases
  • decreases
Q.13

The cylindrical shell of a Lancashire boiler has diameter from

  • 1 to 2 m
  • 1.25 to 2.25 m
  • 1.5 to 2.5 m
  • 1.75 to 2.75 m
Q.14

For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is __________ the piston speed of single acting steam engine.

  • equal to
  • twice
  • three times
  • four times
Q.15

The forced circulation of water does not take place in

  • La-Mont boiler
  • Lancashire boiler
  • Velox boiler
  • Benson boiler
Q.16

The ratio of brake power to the indicated power is known as

  • mechanical efficiency
  • overall efficiency
  • indicated thermal efficiency
  • brake thermal efficiency
Q.17

The water tubes in a simple vertical boiler are

  • horizontal
  • vertical
  • inclined
Q.18

Which of the following boiler works on a forced circulation of water?

  • La-mont boiler
  • Benson boiler
  • Loeffler boiler
  • all of these
Q.19

A compound steam engine in which piston rods of high pressure and low pressure cylinders are attached to two different cranks set atto each other, is called

  • receiver type compound engine
  • Tandem type compound engine
  • Woolf type compound engine
  • both (a) and (b)
Q.20

A device used to heat feed water by utilising the heat in me exhaust flue gases before leaving through the chimny, is known as

  • economiser
  • fusible plug
  • superheater
  • stop valve
Q.21

The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as

  • equivalent evaporation
  • factor of evaporation
  • boiler efficiency
  • power of a boiler
Q.22

The clearance in the engine cylinder has no effect on the steam consumption.

  • True
  • False
Q.23

The principal function of a stop valve is to

  • control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
  • empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
  • put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
  • increase the temperature of saturated steam without raising its pressure
Q.24

A device used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit, is called

  • blow off cock
  • stop valve
  • superheater
  • none of these
Q.25

An economiser is generally placed between

  • last superheater or reheater and air preheater
  • induced draft fan and forced draft fan
  • air preheater and chimney
  • none of the above
Q.26

The length of Cornish boiler varies from

  • 2 to 4.5 m
  • 3 to 5 m
  • 5 to 7.5 m
  • 7 to 9 m
Q.27

The device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called

  • safety valve
  • water level indicator
  • pressure gauge
  • fusible plug
Q.28

In fire tube boilers

  • water passes through the tubes which are surrounded by flames and hot gases
  • the flames and hot gases pass through the tubes which are surrounded by water
  • forced circulation takes place
  • none of these
Q.29

The indicated thermal efficiency is defined as the

  • ratio of thermal efficiency to the Rankine efficiency
  • ratio of brake power to the indicated power
  • ratio of heat equivalent to indicated power to the energy supplied in steam
  • product of thermal efficiency and Rankine efficiency
Q.30

In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of

  • 10 atmospheres
  • 20 atmospheres
  • 30 atmospheres
  • 40 atmospheres
0 h : 0 m : 1 s