1. Automobile piston is an extremely key part of ________ engine:
(A) Jet
(B) Wankel
(C) Combustion
(D) None of these
2. Any object in motion ______ any effort to change its speed or direction of motion:
(A) Increase
(B) Stop
(C) Resists
(D) None of these
3. The piston is lighter in weight:
(A) Cast iron
(B) Steel
(C) Aluminum alloy
(D) None of these
4. The combustion heat absorbed by the piston:
(A) 40%
(B) 50%
(C) 60%
(D) None of these
5. A surface mark made by an object being rubbed or scraped is called:
(A) Pitting
(B) Hissing
(C) Scuffing
(D) None of these
6. An advanced stage of scuffing is called:
(A) Scoring
(B) Coating
(C) Taping
(D) None of these
7. Insufficient clearance can cause the piston to ________ in the cylinder:
(A) Free
(B) Seize
(C) Speedy
(D) None of these
8. The piston rings are made of:
(A) Aluminum alloy
(B) Carbon steel
(C) Alloy cast iron
(D) None of these
9. The end gap of top ring is:
(A) 0.25 to 0.45 mm
(B) 0.10 to 0.20 mm
(C) 0.50 to 0.60 mm
(D) None of these
10. The method now most generally used in piston pin fitting:
(A) Full-Floating
(B) Semi-Floating
(C) Screw Fastened
(D) None of these
11. The ends of the spiral expander must always be _______ the ring joint:
(A) Top
(B) Bottom
(C) Opposite
(D) None of these
12. The vertical clearance remaining in the piston ring groove is called:
(A) End gap clearance
(B) Piston ring side clearance
(C) Piston clearance
(D) None of these
13. Piston ring groove side clearances should be between:
(A) 0.1 - 0.4 inch
(B) 0.01 – 0.04 inch
(C) 0.001 – 0.004 inch
(D) None of these
14. The piston rings can be inspected when the piston is ____ the cylinder:
(A) In
(B) Out of
(C) Both a & b
(D) None of these
15. The ________ fits into a groove turned in the piston boss:
(A) Ring
(B) Circlip spring
(C) Coil spring
(D) None of these