Related Questions

A bell rings every 15 minute. If the bell rang at 12.40, which of the following could be a time at which the bell had sounded?
A 5:30
B 6:45
C 7:15
D 8:10
A tank is fitted with 8 pipes, some of them that fill the tank and others that are waste pipe meant to those that empty the tank can empty it in 6 hours. If all the pipes are kept open when the tank is full, it will take exactly 6 hours for the tank to empty. How many of these are these are fill pipes?
A 2
B 4
C 6
D 5
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)
A Less than 20d
B Greater than 30d
C Between 20d and 30d
D Equal to inside diameter of pipe
The drive-shafts are connected to the differential and wheel hubs through universal joints because the universal joints
A Absorb the vibrations transferred from the surface of the road
B Compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.
C Absorb any difference in speed between the left and right wheels when the vehicle is turning
D None of the above
Lead is poured into the joint between two pipes. These pipes may be made of
A Cast iron
B Vitrified clay
C Asbestos cement
D Concrete
Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 20 minutes, and 10 minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P, Q and R respectively. What is the proportion of the solution R in the liquid in the tank after 3 minutes?
A $$\frac{5}{{11}}$$
B $$\frac{6}{{11}}$$
C $$\frac{7}{{11}}$$
D $$\frac{8}{{11}}$$
Two pipes A and B can fill a tank in 20 and 30 minutes respectively . If both the pipes are used together , then how long will it take to fill the tank ?
A 12 min
B 15 min
C 25 min
D 50 min
Two pipes A and B can fill a tank in 15 minutes and 20 minutes respectively. Both the pipes are opended together but after 4 minutes, pipe A is turned off. What is the total time required to fill the tank?
A 10 min 20 sec
B 11 min 45 sec
C 12 min 30 sec
D 14 min 40 sec
Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is ----
A 60 gallons
B 120 gallons
C 150 gallons
D 170 gallons
Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in:
A 2811 hours
B 3917hours
C 412 hours
D 11317hours

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