Q.1

Cut-off governing as compared to throttle governing is

  • less efficient and less economical
  • less efficient and more economical
  • more efficient and less economical
  • more efficient and more economical
Q.2

Cut-off ratio is the ratio of

  • swept volume to the volume at cut-off
  • volume at cut-off to the clearance volume
  • volume at cut-off to the swept volume
  • clearance volume to the volume at cut-off
Q.3

In a fire tube boiler, the water is contained inside the tubes which are surrounded by flames and hot gases from outside.

  • True
  • False
Q.4

Locomotive boiler is a __________ boiler.

  • fire tube
  • water tube
Q.5

When steam after doing work in the cylinder passes into a condenser, the engine is said to be a

  • slow speed engine
  • vertical steam engine
  • condensing steam engine
  • non-condensing steam engine
Q.6

The draught produced by a steam jet issuing from a nozzle placed in the chimney is called

  • induced steam jet draught
  • chimney draught
  • forced steam jet draught
  • none of these
Q.7

In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is __________ the condenser pressure.

  • equal to
  • lower than
  • higher than
Q.8

In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is __________ the lowpressure cylinder.

  • equal to
  • less than
  • more than
Q.9

The ratio of the actual vacuum to the ideal vacuum in a condenser is called

  • condenser efficiency
  • vacuum efficiency
  • nozzle efficiency
  • boiler efficiency
Q.10

The average value of diagram factor lies between

  • 0.2 to 0.5
  • 0.5 to 0.65
  • 0.65 to 0.9
  • 0.8 to 1.2
Q.11

In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is __________ the atmospheric pressure.

  • equal to
  • lower than
  • higher than
Q.12

The rate of flow of steam is __________ in case of fire tube boilers.

  • less
  • more
Q.13

The diameter of internal flue tubes of a Lancashire boiler is about __________ that of its shell.

  • one-fourth
  • one-third
  • two-fifth
  • one-half
Q.14

Steam engines are called external combustion engines.

  • Yes
  • No
Q.15

The chimney draught varies with

  • climatic conditions
  • temperature of furnace gases
  • height of chimney
  • all of these
Q.16

A compound steam engine requires a heavier flywheel than simple steam engines.

  • True
  • False
Q.17

The governing of steam engines keep the engine speed constant according to the changing load conditions

  • Yes
  • No
Q.18

Babcock and Wilcox boiler is a stationary type of water tube boiler.

  • Correct
  • Incorrect
Q.19

A compound steam engine in which the high pressure and low pressure cylinders have common piston rod, is called

  • receiver type compound engine
  • Tandem type compound engine
  • Woolf type compound engine
  • none of these
Q.20

The function of a D-slide valve is to exhaust steam from the cylinder at proper moment.

  • Correct
  • Incorrect
Q.21

The fittings mounted on the boiler for its proper and safe functioning is a

  • water level indicatior
  • pressure gauge
  • safety valve
  • all of these
Q.22

Blow off cock in a boiler is used 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.23

The number of water level indicators in a boiler are generally __________ in number.

  • one
  • two
  • three
  • four
Q.24

Locomotive boiler produces steam at a very high rate.

  • Yes
  • No
Q.25

A closed vessel made of steel and used for the generation of steam is called a

  • steam boiler
  • steam turbine
  • steam condenser
  • steam injector
Q.26

A Cochran boiler is a horizontal multi-tubular boiler.

  • Yes
  • No
Q.27

An economiser is used to increase the temperature of saturated steam without raising its pressure.

  • Correct
  • Incorrect
Q.28

The mechanical draught produces more draught than natural draught.

  • True
  • False
Q.29

The cylinder condensation or missing quantity may be reduced by

  • the efficient steam jacketing of the cylinder walls
  • superheating the steam supplied to the engine cylinder
  • keeping the expansion ratio small in each cylinder
  • all of the above
Q.30

For the same diameter and thickness of tube, a water tube boiler has __________ heating surface as compared to fire tube boiler.

  • more
  • less
  • equal
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