Which of the following types of pumps can be used for concreting ?1. Piston operated. 2. Pneumatically operated. 3. Centrifugal operated, with straight blades. 4. Screw type.

Which of the following types of pumps can be used for concreting ?1. P

1.	Which of the following types of pumps can be used for concreting ?1. Piston operated. 2. Pneumatically operated. 3. Centrifugal operated, with straight blades. 4. Screw type.
A.	1 and 3
B.	1 and 2
C.	1, 3 and 4
D.	2 and 4
Answer» C. 1, 3 and 4

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Which of the following types of pumps can be used for concreting ?1. Piston operated. 2. Pneumatically operated. 3. Centrifugal operated, with straight blades. 4. Screw type.

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