Question 1
In case of softwood frames, which of the following shall be of hardwood?
A. Bottom shutter of the window
B. Bottom sill of the window
C. Bottom head of the window
D. Bottom rail of the window
View Answer
Answer: Option B
Explanation:
Members of frames of timber doors and windows are usually made of the same species of timber except in the case of softwood frames. In softwood frames, the bottom sill of the window shall be of hardwood.
Question 2
How many holdfasts shall be fixed on each side in case of window and ventilator frames with height less than 1 m?
A. Two
B. Three
C. Four
D. Five
View Answer
Answer: Option A
Explanation:
Two holdfasts shall be fixed on each side in case of window and ventilator frames with height less than 1 m. According to the Indian Standards, these should be fixed at the quarter points of the frames.
Question 3
Solid core flush door is also known as ________
A. Laminated core flush door
B. Cellular core flush door
C. Sash door
D. Battened door
View Answer
Answer: Option A
Explanation:
Flush doors are of two types – solid core flush door and hollow core flush door. Solid core flush door is also known as a laminated core flush door. It consists of a wooden frame comprising styles, top rail and the bottom rail. The top and bottom rails are used to hold the core.
Question 4
The contact surfaces of tenons should be treated with __________ before putting together.
A. Mud
B. Animal glue
C. Amber
D. Alcohol
View Answer
Answer: Option B
Explanation:
The contact surfaces of tenons should be treated with animal glue before putting together. In place of animal glue, you can use a proper adhesive or polyvinyl acetate dispersion based adhesive.
Question 5
The cross-sectional area of the head and the post of a door frame is generally kept the same.
A. True
B. False
View Answer
Answer: Option A
Explanation:
The cross-sectional area of the head and the post of a door frame is generally kept the same. The top horizontal member of the door frame is known as the head while the vertical members are known as posts.
Question 6
The minimum number of holdfasts on each side of the door and window timber frames should be ________
A. Two
B. Three
C. Four
D. Five
View Answer
Answer: Option B
Explanation:
The minimum number of holdfasts on each side of the door and window timber frames should be three. One should be at the centre point and the other two should be fixed at 300 mm from the top and the bottom of the frames.
Question 7
The right angle of the members of a door shall be checked from their outer surface.
A. True
B. False
View Answer
Answer: Option B
Explanation:
According to the Indian Standard, all the members of a door should be exactly at right angles. The right angle of these members shall be checked from their inner surfaces.
Question 8
The size of a door frame is determined after allowing a margin of __________ all-round.
A. 1 mm
B. 3 mm
C. 5 mm
D. 7 mm
View Answer
Answer: Option C
Explanation:
A door frame consists of horizontal and vertical members forming an enclosure. The size of a door frame is determined after allowing a margin of 5 mm to both the sides and the top of the door opening. This is one of the recommendations laid down by the Indian Standard.
Question 9
The thickness of a timber frame may vary between _______
A. 20-35 mm
B. 60-75 mm
C. 20-35 cm
D. 60-75 cm
View Answer
Answer: Option B
Explanation:
Depending upon the size of the door opening and the type of timber used, the thickness of a timber frame may vary between 60-75 mm. The same thickness is used for the horizontal and vertical members of the door frame.
Question 10
The width of a timber door frame is _______ if the shutter is provided only to one side of the door.
A. 10 mm
B. 50 mm
C. 100 mm
D. 200 mm
View Answer
Answer: Option C
Explanation:
The width of a timber door frame is 100 mm if the shutter is provided only to one side of the door. This is the general case of a timber frame. However, if the shutter is provided to both the sides of the frame, then the width is taken 125-140 mm.
Question 11
The width of rebating of the timber frame at its outer edge varies between ________
A. 12.5-15 mm
B. 2.5-13 mm
C. 8.1-9.2 mm
D. 18.5-20.5 mm
View Answer
Answer: Option A
Explanation:
The width of rebating of the timber frame at its outer edge varies between 12.5-15 mm. In this case, the depth is equal to the thickness of the shutter. However, the depth of rebating of the timber frame at its inner edge is equal to 10 mm.
Question 12
Which of the following doors are used to check the entry of flies and insects?
A. Battened doors
B. Wire-gauged doors
C. Sliding doors
D. Swing doors
View Answer
Answer: Option B
Explanation:
Wire-gauged doors are used to check the entry of flies and insects. In these doors, a wire mesh is provided in the panel which allows free movement of air. These doors are usually used for hotels, sweet shops etc.
Question 13
Which of the following frames are used only for those residential buildings where more funds are available?
A. Timber frames
B. Aluminium frames
C. Steel frames
D. Stone frames
View Answer
Answer: Option B
Explanation:
Aluminium frames are used only for those residential buildings where more funds are available because of their large costs. Timber frames can be easily attacked by termites. Stone frames are used in villages where the stone of good quality in required size is available.
Question 14
Which of the following is an anti-termite solution?
A. Aldrex
B. Acetone
C. Alcohol
D. Water
View Answer
Answer: Option A
Explanation:
Aldrex is an anti-termite solution. It is added to coal tar which is then rubbed on all the parts of the timber frame which are in contact with the masonry. This prevents the timber from the attack of termites. Acetone is a volatile solution and hence is soaked by the wood which makes it ineffective against the attack of termites.
Question 15
Which of the following is not a section of a steel door frame?
A. Single angle iron
B. Double angle iron
C. Q-section
D. T-section
View Answer
Answer: Option C
Explanation:
The various sections of a steel door frame are single angle iron, double angle iron, T-section and channel sections. Steel frames are widely used in factories and workshops.
Question 16
Which of the following is not a type of joint between the head and the post of the timber frame?
A. Closed mortised and tenoned joint
B. Open and pin joint
C. Pin and tenoned joint
D. Dovetailed joint
View Answer
Answer: Option B
Explanation:
The various types of joints between the head and the post of the timber frame are – closed mortised and tenoned joint, pin and tenoned joint, and dovetailed joint. However, Indian Standard recommends a dovetail joint out of these three types.