Q.1

The ratio of the clearance volume to the swept volume is called

  • cut-off ratio
  • expansion ratip
  • clearance ratio
  • none of these
Q.2

In a Tandem type compound engine, the high pressure and low pressure cylinders

  • have common piston rod
  • are set at 90°
  • have separate piston rods
  • are set in V - arrangement
Q.3

In cross compounding, the cylinders are arranged

  • side by side and each cylinder has common piston, connecting rod and crank
  • side by side and each cylinder has separate piston, connecting rod and crank
  • at 90° and each cylinder has common piston, connecting rod and crank
  • at 90° and each cylinder has separate piston, connecting rod and crank
Q.4

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.5

Water tube boilers produce steam at a __________ pressure than that of fire tube boilers.

  • lower
  • higher
Q.6

Benson boiler requires

  • no drum
  • one drum
  • two drums
  • three drums
Q.7

The diagram factor is the ratio of the

  • area of the actual indicator diagram to the area of theoretical indicator diagram
  • actual workdone per stroke to the theoretical workdone per stroke
  • actual mean effective pressure to the theoretical mean effective pressure
  • any one of the above
Q.8

The maximum steam pressure in a Locomotive boiler is limited to

  • 0.18 MN/m2
  • 1.8 MN/m2
  • 18 MN/m2
  • 180 MN/m2
Q.9

The damper in a steam boiler is provided to control the draught (i.e. rate of flow of air) and thus regulate the rate of generation of steam.

  • Correct
  • Incorrect
Q.10

The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called

  • natural draught
  • induced draught
  • forced draught
  • balanced draught
Q.11

Lancashire boiler is a stationary fire tube boiler.

  • Agree
  • Disagree
Q.12

The motion of a D-slide valve in a steam engine is simple harmonic.

  • Yes
  • No
Q.13

The heat balance sheet for the boiler shows the

  • complete account of heat supplied by 1 kg of dry fuel and the heat consumed
  • moisture present in the fuel
  • steam formed by combustion of hygrogen per kg of fuel
  • all of the above
Q.14

The equivalent evaporation is defined as

  • the ratio of heat actually used in producing the steam to the heat liberated in the furnace
  • the amount of water evaporated or steam produced in kg per kg of fuel burnt
  • the amount of water evaporated from and at 100° C into dry and saturated steam
  • the evaporation of 15.653 kg of water per hour from and at 100° C
Q.15

The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks

  • 180° to each other
  • 90° to each other
  • 0° to each other
  • none of these
Q.16

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

  • does not change
  • increases
  • decreases
Q.17

For maximum discharge through a chimney, the temperature of flue gases inside the chimney should the slightly more than the atmospheric temperature.

  • Correct
  • Incorrect
Q.18

The relative efficiency is defined as the

  • ratio of thermal efficiency to 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.19

Which of the following is a water tube boiler ?

  • Lancashire boiler
  • Babcock and Wilcox boiler
  • Locomotive boiler
  • Cochran boiler
Q.20

The high pressure and low pressure cylinders in a receiver type compound engine are regarded as having cranks

  • 180° to each other
  • 90° to each other
  • 0° to each other
  • none of these
Q.21

The clearance in the engine cylinder

  • increases the mean effective pressure
  • increases the workdone
  • decreases the efficiency of the engine
  • all of these
Q.22

The Locomotive boiler has

  • 137 fire tubes and 44 superheated tubes
  • 147 fire tubes and 34 superheated tubes
  • 157 fire tubes and 24 superheated tubes
  • 167 fire tubes and 14 superheated tubes
Q.23

Lancashire boiler is used where working pressure and power required are

  • low
  • moderate
  • high
  • none of these
Q.24

A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as

  • blow off cock
  • fusible plug
  • superheater
  • stop valve
Q.25

Lancashire boiler is

  • stationary fire tube boiler
  • internally fired boiler
  • horizontal boiler
  • all of these
Q.26

The draught is the __________ of pressures above and below the fire grate.

  • sum
  • difference
Q.27

The performance of a boiler is measured by the

  • amount of water evaporated per hour
  • steam produced in kg/h
  • steam produced in kg/kg of fuel burnt
  • all of these
Q.28

Locomotive boiler is a

  • single tube, horizontal, internally fired and stationary boiler
  • single tube, vertical, externally fired and stationary boiler
  • multitubular, horizontal, internally fired and mobile boiler
  • multitubular, horizontal, externally fired and stationary boiler
Q.29

The amount of water evaporated or steam produced in kg per kg of fuel burnt is known as power of a boiler.

  • True
  • False
Q.30

The velocity of flue gases (V) through the chimney under a static draught of(H') metres is given by

  • V = 2g H'
  • V = 2g/H'
  • V = H'/2g
  • V = 2gH'
0 h : 0 m : 1 s