721.
A device which is used for remove the impurities from the boiler is called
A
Blow-off-cock
B
Economizer
C
Feed pump
D
Injector
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A device which is used for remove the impurities from the boiler is called
Blow-off-cock
Economizer
Feed pump
Injector
A device which is used for pumping the water in boiler is
Feed Pump
Feed check valve
Economi ser
Injector
1 kg/cm2 = ........bar
981
0.981
9.81
98.1
1 inch is equals to how many centimeters?
2.58
2.5
2.46
2.54
A source of energy is known as renewable source
All of the above
Fossil fuel
Solar
CNG
Work is considered positive when
none of the above
Work is done on the system
work is done by the system
both a and b
When mixing mortar, what material is added to the power mixer first?
water
cement
gravel
sand
When laying masonry units, mortar is used to achieve .........
proper consistency
compact joints
minimal waste
plumb wall
What type of chisel isused for chipping mortar from joints?
tooth
mason
plugging
rubber-grip
What causes a whitish stain to appear on masonry walls due to the formation of soluble salts?
moss
acid
efflorescence
lime
The tool used to transport 12 bricks together is a brick
tong
bucket
cart
dolly
The first arches were developed by the ..........
Romans
Americans
Egyptians
Mayans
How many inches are in a yard?
108
12
36
72
How many courses of block (8" x 8" x 16") are needed to build a wall that is 8' 8" tall?
24
12
13
16
A tuckpoint grinder is used to
remove mortar joints
clean masonry units
cut masonry units
cut rebar
A modular spacing rule is based on a module size of
16 inches
2 inches
4 inches
8 inches
Why do casting processes generally produce minimal waste?
because moulds are carefully designed.
because excess metal can be melted down and used again
because factories are always kept warm
because castings shrink when they cool down
Which of these processes is used for manufacturing of bi-metal pipes?
sand casting
turning
forging
centrifugal casting
Which of these metals is most commonly sand cast?
titanium
bronze
silver
steel
Which of these metals is commonly die cast?
titanium
lead
steel
aluminium