Power Screws Multiple Choice Questions - Set 02 - ObjectiveBooks

# Practice Test: Question Set - 02

1. The maximum efficiency of square threaded power depends upon
(B) Friction angle
(C) Pitch of screw
(D) Nominal diameter of screw

2. For over hauling screw
(A) Ï† > Î±
(B) Î± > Ï†
(C) Ï† = Î±
(D) None of the above

3. Which of the following screw thread is stronger than other threads?

4. Multiple threads are used for
(A) High efficiency
(C) Low efficiency for self-locking

5. Which of the following screw thread is adaptable to split type nut?

6. The efficiency of square threaded power screw is given by,
(A) Î· = tan Î±/tan (Î± + Ï†)
(B) Î· = tan Î±/tan (Î± - Ï†)
(C) Î· = tan (Î± + Ï†)/tan Î±
(D) Î· = tan (Î± - Ï†)/tan Î±

7. For self locking screw
(A) Ï† > Î±
(B) Î± > Ï†
(C) Î¼ < tan Î±
(D) Î¼ = cosec Î±

8. Which of the following screw thread is used for transmitting power in either direction?
(D) Both (A) and (B)

9. A cup is provided in screw jack
(A) To reduce the friction
(B) To prevent rotation of load