5th Class Practice Question

Question 1

In a serpentine boiler the _________ is installed below the water tubes.

A. draft diverter
B. Pressure relief valve
C. Temperature pressure gauge
D. Combustion chamber
E. Operating high limit aquastat

Answer 1

D. Combustion chamber

Question 2

A high temperature rope or gasket materials is installed between the cast iron section to__________.

A. Create a tight seal and prevent flue gases from escaping
B. Tightly hold the sections together
C. Increase the surface area to improve heat transfer
D. Provide cleanout ports
E. Increase the heat transfer by reducing the combustion flue gas flow rate

Answer 2

A. Create a tight seal and prevent flue gases from escaping

Question 3

Locomotive boilers have the following advantages compared to other boiler designs

A. No brickwork
B. No refractory
C. No setting
D. Portability
E. Very little water surrounds the furnace

Answer 3

E. Very little water surruounds the furnace

Question 4

The central generating chamber houses the ________ of an electrode type electric boiler.

A. Water gauge
B. Low water cut off
C. Electrodes
D. Lagging

Answer 4

C. Electrodes

Question 5

Which of the following instruments is shaped oval in cross section and designed as letter C.

A. Safety Valve
B. Bourbon tube
C. Transmitter
D. Transducer
E. Bellows

Answer 5

B. Bourbon tube

Question 6

The pressure relief valve installed in a hot water heating system.

A. Installed close or anywhere reasonably close to the tank
B. Is required to have the discharge piping be routed just above the floor drain.
C. Is required to be installed on every hot water heating system boiler.
D. Should have no valve installed between the pressure relief valve and the boiler.
E. Have an operating temperature limit of 80*C

Answer 6

No answers

Question 7

To prevent uneven expansion and themal shock damga boiler operator should ______ a cold firetube boiler.

A.