1. Which of the following instruments will have a four number formula

A. Ordinary hatchet
B. GMT
C. Jeffery hatchet
D. All of the above

Ans. B

2. The most effective method of maintaining dry field in dentistry is

A. Gingival retraction
B. Rubber dam
C. Throat swab and cotton
D. Suction tips

Ans. B

3. Four numbered instrument formula other than GMT

A. Chistle
B. Hoe
C. Angle former
D. Hatchet

Ans. C

4. High speed includes the RPM between

A. 20000-50000
B. 50000-100000
C. 100000-200000
D. Above 200000

Ans. B

5. A major factor determining the efficiency of bur is

A. Taper angle
B. Spiral angle
C. Head length
D. Head diameter

Ans. B

6. The angle former is a special type of

A. Chisel
B. Excavator
C. Hatchet
D. Rotary instrument

Ans. B

7. The enamel bevel of a gingival floor is done with

A. Hatchet
B. Chisel
C. Hoe
D. Curette

Ans. B

8. The recommended rubber dam to provide effective retraction of gingival tissue is

A. Thin
B. Extra heavy
C. Heavy
D. Medium

Ans. C

9. The recommended clamp for class V tooth preparation

A. No 213
B. No 212
C. No 123
D. No 122

Ans. B

10. The encircled number in the given instrument formula represents10-(80)-6-12

A. Width of the blade
B. Length of the blade
C. Angulation of the blade to the long axis
D. Angulation of the cutting edge of blade to the long axis

Ans. D