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CBSE PORTAL : (Download) CBSE Class-12 Sample Paper 2019-20 : Mechanical Engineering

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(Download) CBSE Class-12 Sample Paper 2019-20 : Mechanical Engineering

Posted: 23 Aug 2019 04:53 AM PDT

(Download) CBSE Class-12 Sample Paper 2019-20 : Mechanical Engineering

Class: XII
Mechanical Engineering-626
Sample Question Paper 2019-20

SECTION –A

Answer any 10 questions out of the given 12 questions-(1 Mark Each) Choose the correct answer

Q1 In a four stroke engine number of power stroke in two rotation of crank shaft is
a) One
b) Two
c) Three
d) Four

Q2 The friction disk is positioned between the flywheel and _______.
a) Engine
b) Crankshaft
c) Pressure plate
d) Differential

Q3 Distance travelled by the piston in moving from T.D.C. to the B.D.C is called
a) Stroke.
b) Bore.
c) Clearance volume.
d) Displacement Volume.

Q4 The velocity ratio of two pulleys connected by an open belt or crossed belt is
a) directly proportional to their diameters.
b) inversely proportional to their diameters.
c) directly proportional to the square of their diameters.
d) inversely proportional to the square of their diameters.

Q5 When two pulleys of different diameters are connected by means of an open belt drive,then the angle of contact taken into consideration should be of the
a) larger pulley.
b) smaller pulley.
c) average of two pulleys.
d) none of the mentioned.

Q6 Which gear train is used for higher velocity ratios in a small space?
a) Simple gear train
b) Compound gear train
c) Reverted gear train
d) Epicyclic gear train

Q7 The function of the following fitting is to extinguish boiler furnace fire in case of water level falling below safe level:
a) Feed check valve
b) Blow off cock
c) Safety valve
d) Fusible plug

Q8 Which of the following as referred to steam boiler is defined as mounting?
a) Safety valve
b) Economizer
c) Air pre heater
d) Feed Pump

Q9 What is the function of Blow down valve of a boiler?
a) To remove sludge
b) To build sediments
c) To remove Flue gas
d) To remove ash

Q10 Which of the following is an impulse turbine?
a) Pelton turbine
b) Francis turbine
c) Kaplan turbine
d) Propeller turbine

Q11 Kaplan turbine is:
a) A high head mixed flow turbine
b) A low head axial flow turbine
c) An outward flow reaction turbine
d) An impulse inward flow turbine

Q12 _______ restricts the crane from tipping
a) Gear
b) Indicator
c) Counterweights
d) Boom

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CBSE Board Class-XII

सीबीएसई बोर्ड कक्षा-12

Sample Paper

Mechanical Engineering

Class-12

(Download) CBSE Class-10 Sample Paper And Marking Scheme 2019-20: (Beauty and Wellness)

Posted: 23 Aug 2019 04:24 AM PDT

(Download) CBSE Class-10 Sample Paper And Marking Scheme 2019-20:

(Beauty and Wellness)

Class X - 2019-20
BEAUTY AND WELLNESS (407)
Time: 2 Hours
Max. Marks: 50

SECTION –A

Fill in the blanks 10X1=10

Answer any 10 questions out of the given 12 questions:
1. Normal skin has Ph of about __________.

2. Regular practice of __________ removes all minor deformities of back.

3. A regular intake of __________ is essential to maintain good health.

4. Most hair conditioners contain positively charged molecules called _________surfactants.

5. Violet color governs the ___________ chakra in the body. This color helps in decision making process.

6. ___________ Manicure is differentiated by regular manicure due to different way of application of nail paint.

7. The word manicure is derived from _________ word “manus”.

8. ___________are placed on the nail into wet polish.

9. To attach a nail__________, a hole is drilled in nail art.

10. __________ is made from tiny strips of foils that are available in many colors.

11. Cobra pose is also known as ____________.

12. Before applying nail paint, place the _________________ between the toes.

VERY SHORT ANSWER (attempt any five) 5X2=10

13. Define paraffin manicure.
14. What is the definition of nutrition?
15. List contraindications of pedicure.
16. List the types of skin. Write the characteristics for oily skin type.
17. Why conditioner is used after shampooing the hair?
18. List any four benefits of henna application on head.
19. What is nail art?

SHORT ANSWERS (attempt any five) 5X3=15

20. Write down the career options in Beauty and Wellness industry.
21. Explain massage movements used in pedicure.
22. Describe in detail about Hydro therapy.
23. Explain the techniques used for sterilization.
24. Describe any 3 tools used in hair cutting.
25. Write down the various safety in hair cutting.
26. Briefly explain the procedure of powder bleach.