#61.
What is the surface area of a sphere whose
volume is 36 cu.m?
A
55.8 cum
B
48.90 cum
C
52.70 cum
D
57.78 cum
Answer: 52.70 cum
#62.
The pressure in a tank is 50 psi, what is the equivalent pressure head of water
A
733.94 ft
B
115.38 ft
C
9.62 ft
D
61.16 ft
Answer: 115.38 ft
#63.
What is the equivalent pressure head of fuel oil with sp. Gr.=
0.92 if the pressure in a tank is 50 psi?
A
125.42 ft
B
115.38 ft
C
797.77 ft
D
733.94 ft
Answer: 125.42 ft
#64.
A tank can be filled by pipe A in 3 hours and by pipe B
in 5 hours. When the tank is full, it can be drained by
pipe C in 4 hours.What is the rate of Pipe A
A
1/12
B
1/5
C
1/3
D
1/4
Answer: 1/3
#65.
A tank can be filled by pipe A in 3 hours and by pipe B
in 5 hours. When the tank is full, it can be drained by
pipe C in 4 hours.What is the rate of pipe C
A
1/12
B
1/4
C
1/5
D
1/3
Answer: 1/4
#66.
A tank can be filled by pipe A in 3 hours and by pipe B
in 5 hours. When the tank is full, it can be drained by
pipe C in 4 hours.If the tank is initially empty and pipe A & pipe B
are open, how many hours will take to fill up the
tank?
A
3.53
B
1.714
C
0.53
D
1.875
Answer: 1.875
#67.
A tank can be filled by pipe A in 3 hours and by pipe B
in 5 hours. When the tank is full, it can be drained by
pipe C in 4 hours. If the tank is half full and pipe A & pipe C are
open, how many hours will it take to fill up the
tank?
A
3
B
2
C
6
D
12
Answer: 6
#68.
A tank can be filled by pipe A in 3 hours and by pipe B
in 5 hours. When the tank is full, it can be drained by
pipe C in 4 hours. If the tank is initially empty and all three pipe are
open, how many hours will it take to fill up the
tank?
A
0.28
B
3.53
C
0.78
D
1.28
Answer: 3.53
#69.
A vertical pole 6 ft high casts a shadow 4 ft long.
At the same time a tree casts a shadow 64 ft long.
What is the height, in feet, of the tree?
A
44
B
72
C
192
D
96
Answer: 96
#70.
If 4 men can clear the garbage near a school in 6
hours, how many hours will it take 12 men
working at the same rate to perform this task?
A
2
B
4
C
8
D
7
Answer: 2
#71.
Is a sewer line or system directly controlled by
public authority?
A
House sewer
B
Private sewer
C
Main sewer
D
Sanitary sewer
Answer: Main sewer
#72.
Air pressure in drainage pipes greater than
atmospheric pressure?
A
Normal pressure
B
Standard pressure
C
Barometric pressure
D
Back pressure
Answer: Back pressure
#73.
Refers to the pressure range measured over a
period of 24 hours?
A
Static pressure
B
Pressure
C
Critical pressure
D
Normal pressure
Answer: Critical pressure
#74.
Located at the lower end of the pump used
to prevent lost of priming the pump?
A
Globe valve
B
Foot valve
C
Gate valve
D
Angle valve
Answer: Foot valve
#75.
The inspection of gas piping system prior to
covering or concealing such pipe is called a:
A
Routine inspection
B
Hydro piping inspection
C
Rough piping inspection
D
Site inspection
Answer: Rough piping inspection
#76.
In bending plastic, what will be the practical
material to be used to prevent fattening of the
pipe?
A
Metal spring
B
Water
C
Sand
D
Gravel
Answer: Sand
#77.
An alloy of copper and tin is 20% copper. How
many pounds of copper must be added to 20
pounds of the alloy in order for the resulting alloy
to be 50% copper?
A
6
B
13
C
12.5
D
12
Answer: 12
#78.
How much water, in cm3, must be added to 100
cm3
of 80% solution of boric acid to reduce it to a
50% solution?
A
30
B
40
C
50
D
60
Answer: 60
#79.
How many quartz of a 90% solution of alcohol
should be mixed with a 75% solution of alcohol in
order to make 20 quarts of 78% solution?
A
4
B
5
C
6
D
3
Answer: 4
#80.
A machine can cut some wood in 6 minutes, and a
man using a hand saw can do it in 18 minutes.
After 4 minutes there is a power shortage and the
wood must be cut by hand saw. How many
minutes must the man work to complete the
task?
A
2
B
6
C
12
D
14
Answer: 6
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