The operation of a mechanical steam trap depends on the:

The operation of a mechanical steam trap depends on the:

a. difference in temperature between the steam and condensate
b. difference in specific gravity between the steam and condensate
c. difference in pressure between the steam and condensate
d. liquid level in the condensate tank
e. liquid level in the steam trap

Answer: E

When tightening pipe flange bolts:

When tightening pipe flange bolts:

a. tighten them in sequence
b. the gasket should be held in place by gasket glue
c. the top bolts must be tightened first
d. use a cross-over method or a criss-cross method of tightening
e. tighten every second bolt then tighten the others

Answer: D

Before admitting any steam to a steam piping system it is imperative to first:

Before admitting any steam to a steam piping system it is imperative to first:

a. warm up the line properly
b. positively ensure that no water or condensate exists in the piping
c. ensure drain valves are closed
d. crack open the steam valve
e. ensure the steam pressure is at maximum value allowed without the boiler safety valve opening

Answer: B

Low pressure steam pipes are usually connected together by:

Low pressure steam pipes are usually connected together by:

a. welding
b. glands
c. screwed fittings
d. flanges

Answer: A, C & D.

The two types of expansion joints are the _______ and the slip expansion joint.

The two types of expansion joints are the _______ and the slip expansion joint.

a. bolted
b. fixed
c. stationary
d. corrugated
e. rotating

Answer: D

Fittings used to connect a straight run of same size piping are:

Fittings used to connect a straight run of same size piping are:

a. nipples
b. couplings
c. bushings
d. elbows
e. return bends

Answer: B

The best material for gaskets in very high temperature areas would be:

The best material for gaskets in very high temperature areas would be:

a. metallic
b. cork
c. nylon
d. plastic foam
e. rubber

Answer: A

Double extra strong pipe is denoted by:

Double extra strong pipe is denoted by:

a. SS
b. 2S
c. ES
d. XXS
e. DES

Answer: D

The mass of a two metre length of schedule 40 pipe, nominal size 101.6 mm, is:

The mass of a two metre length of schedule 40 pipe, nominal size 101.6 mm, is:

a. 12.04 kg
b. 8 kg
c. 31.9 kg
d. 26.92 kg
e. 11.48 kg

Answer: C

For varying wall thicknesses of pipe, tables are developed which give the dimensions and:

For varying wall thicknesses of pipe, tables are developed which give the dimensions and:

a. volume in cu m
b. length in cm
c. diameter in cm square
d. weight in kg/m
e. thickness in cm

Answer: D

Insulating pipes, which carry substances lower than the ambient air temperature, will prevent ______ on the pipe and consequent dripping and corrosion.

Insulating pipes, which carry substances lower than the ambient air temperature, will prevent ______ on the pipe and consequent dripping and corrosion.

a. discoloration
b. evaporation
c. water hammering
d. expansion
e. sweating

Answer: E

By using backing rings in butt welded pipes, the backing rings serves to:

By using backing rings in butt welded pipes, the backing rings serves to:

a. reinforce the pipe because of beveling at the joint
b. reduce sludge flow
c. align the pipe
d. support the pipe to the wall
e. prevent welding gases from entering the pipe line

Answer: C

Expansion of piping is controlled by:

Expansion of piping is controlled by:

a. anchoring the pipe at both ends to prevent movement
b. installing a corrugated expansion joint in the line
c. installing an expansion bend in the line
d. anchoring the pipe at both ends and installing hangers every five metres

Answer: B & C.

A newer method used to designate pipe wall thickness is the ______ number.

A newer method used to designate pipe wall thickness is the ______ number.

a. schedule
b. regulation
c. diameter
d. circumference
e. pipe registration

Answer: A